City of Stockton (CA) Water Quality

City of Stockton is a large public water system in EPA region 09 that provides tap water for the 95205 - 95207, 95210, 95215, 95231 zip codes. It has 17 facilities where the water supply was tested for 23 chemical contaminants that impact tap water quality and human health.

• Table of Contents
• Contaminants
• Facilities
• FAQ

Contaminants

• Jump To Contaminant
• 1-butanol
• 2-methoxyethanol
• 2-propen-1-ol
• HAA5
• HAA6Br
• HAA9
• alpha-hexachlorocyclohexane
• anatoxin-a
• butylated hydroxyanisole
• chlorpyrifos
• cylindrospermopsin
• dimethipin
• ethoprop
• germanium
• manganese
• o-toluidine
• oxyfluorfen
• profenofos
• quinoline
• tebuconazole
• total microcystin
• total permethrin
• tribufos

1-butanol

1-butanol is a class of Alcohol that has a minimum reporting level of 2 µg/L and a reference level of 700 µg/L. All the latest water samples for City of Stockton showed levels of 1-butanol that were below unsafe concentration levels. Learn more about 1-butanol.

EP-26 4512 Frontier SEWD Intertie	11/19/2019 67 months ago	<2.0 µg/L Below Reporting Level
EP-25 303 Olympic Circle Cal Water Intertie	8/22/2019 70 months ago	<2.0 µg/L Below Reporting Level
EP-24 Finished Water Delta Water Supply Plant	11/19/2019 67 months ago	<2.0 µg/L Below Reporting Level
EP-08 Well 27 Treated Well 27	8/21/2019 70 months ago	<2.0 µg/L Below Reporting Level
EP-06 Well 21 Treated Well 21	8/21/2019 70 months ago	<2.0 µg/L Below Reporting Level
EP-04 Well 19 Treated Well 19	8/21/2019 70 months ago	<2.0 µg/L Below Reporting Level
EP-03 Well 18 Treated Well 18	8/21/2019 70 months ago	<2.0 µg/L Below Reporting Level
EP-13 Well 32 Treated Well 32	8/21/2019 70 months ago	<2.0 µg/L Below Reporting Level
EP-12 Well 31 Treated Well 31	8/21/2019 70 months ago	<2.0 µg/L Below Reporting Level
EP-11 Well 30 Treated Well 30	8/21/2019 70 months ago	<2.0 µg/L Below Reporting Level
EP-23 Well SSS9 Treated Well SSS9	8/22/2019 70 months ago	<2.0 µg/L Below Reporting Level
EP-10 Well 29 Treated Well 29	8/21/2019 70 months ago	<2.0 µg/L Below Reporting Level
EP-21 Well SSS3 Treated Well SSS3	8/22/2019 70 months ago	<2.0 µg/L Below Reporting Level
EP-01 Well 3R Treated Well 3R	8/21/2019 70 months ago	<2.0 µg/L Below Reporting Level
EP-02 Well 10R Treated Well 10-R	2/20/2019 76 months ago	<2.0 µg/L Below Reporting Level
EP-09 Well 28 Treated Well 28	8/21/2019 70 months ago	<2.0 µg/L Below Reporting Level

2-methoxyethanol

2-methoxyethanol is a class of Alcohol that has a minimum reporting level of 0.4 µg/L and a reference level of 21 µg/L. All the latest water samples for City of Stockton showed levels of 2-methoxyethanol that were below unsafe concentration levels. Learn more about 2-methoxyethanol.

EP-26 4512 Frontier SEWD Intertie	11/19/2019 67 months ago	<0.4 µg/L Below Reporting Level
EP-25 303 Olympic Circle Cal Water Intertie	8/22/2019 70 months ago	<0.4 µg/L Below Reporting Level
EP-24 Finished Water Delta Water Supply Plant	11/19/2019 67 months ago	<0.4 µg/L Below Reporting Level
EP-08 Well 27 Treated Well 27	8/21/2019 70 months ago	<0.4 µg/L Below Reporting Level
EP-06 Well 21 Treated Well 21	8/21/2019 70 months ago	<0.4 µg/L Below Reporting Level
EP-04 Well 19 Treated Well 19	8/21/2019 70 months ago	<0.4 µg/L Below Reporting Level
EP-03 Well 18 Treated Well 18	8/21/2019 70 months ago	<0.4 µg/L Below Reporting Level
EP-13 Well 32 Treated Well 32	8/21/2019 70 months ago	<0.4 µg/L Below Reporting Level
EP-12 Well 31 Treated Well 31	8/21/2019 70 months ago	<0.4 µg/L Below Reporting Level
EP-11 Well 30 Treated Well 30	8/21/2019 70 months ago	<0.4 µg/L Below Reporting Level
EP-23 Well SSS9 Treated Well SSS9	8/22/2019 70 months ago	<0.4 µg/L Below Reporting Level
EP-10 Well 29 Treated Well 29	8/21/2019 70 months ago	<0.4 µg/L Below Reporting Level
EP-21 Well SSS3 Treated Well SSS3	8/22/2019 70 months ago	<0.4 µg/L Below Reporting Level
EP-01 Well 3R Treated Well 3R	8/21/2019 70 months ago	<0.4 µg/L Below Reporting Level
EP-02 Well 10R Treated Well 10-R	2/20/2019 76 months ago	<0.4 µg/L Below Reporting Level
EP-09 Well 28 Treated Well 28	8/21/2019 70 months ago	<0.4 µg/L Below Reporting Level

2-propen-1-ol (Allyl Alcohol)

2-propen-1-ol (Allyl Alcohol) is a class of Alcohol that has a minimum reporting level of 0.5 µg/L and a reference level of 35 µg/L. All the latest water samples for City of Stockton showed levels of 2-propen-1-ol (Allyl Alcohol) that were below unsafe concentration levels. Learn more about 2-propen-1-ol (Allyl Alcohol).

EP-26 4512 Frontier SEWD Intertie	11/19/2019 67 months ago	<0.5 µg/L Below Reporting Level
EP-25 303 Olympic Circle Cal Water Intertie	8/22/2019 70 months ago	<0.5 µg/L Below Reporting Level
EP-24 Finished Water Delta Water Supply Plant	11/19/2019 67 months ago	<0.5 µg/L Below Reporting Level
EP-08 Well 27 Treated Well 27	8/21/2019 70 months ago	<0.5 µg/L Below Reporting Level
EP-06 Well 21 Treated Well 21	8/21/2019 70 months ago	<0.5 µg/L Below Reporting Level
EP-04 Well 19 Treated Well 19	8/21/2019 70 months ago	<0.5 µg/L Below Reporting Level
EP-03 Well 18 Treated Well 18	8/21/2019 70 months ago	<0.5 µg/L Below Reporting Level
EP-13 Well 32 Treated Well 32	8/21/2019 70 months ago	<0.5 µg/L Below Reporting Level
EP-12 Well 31 Treated Well 31	8/21/2019 70 months ago	<0.5 µg/L Below Reporting Level
EP-11 Well 30 Treated Well 30	8/21/2019 70 months ago	<0.5 µg/L Below Reporting Level
EP-23 Well SSS9 Treated Well SSS9	8/22/2019 70 months ago	<0.5 µg/L Below Reporting Level
EP-10 Well 29 Treated Well 29	8/21/2019 70 months ago	<0.5 µg/L Below Reporting Level
EP-21 Well SSS3 Treated Well SSS3	8/22/2019 70 months ago	<0.5 µg/L Below Reporting Level
EP-01 Well 3R Treated Well 3R	8/21/2019 70 months ago	<0.5 µg/L Below Reporting Level
EP-02 Well 10R Treated Well 10-R	2/20/2019 76 months ago	<0.5 µg/L Below Reporting Level
EP-09 Well 28 Treated Well 28	8/21/2019 70 months ago	<0.5 µg/L Below Reporting Level

HAA5 (five regulated haloacetic acids)

HAA5 (five regulated haloacetic acids) are a class of Disinfection Byproducts that includes Dibromoacetic Acid, Dichloroacetic Acid, Monobromoacetic Acid, Monochloroacetic Acid, Trichloroacetic Acid and has a minimum reporting level of 0.5 µg/L and a reference level of 60 µg/L. All the latest water samples for City of Stockton showed levels of HAA5 (five regulated haloacetic acids) that were below unsafe concentration levels. The maximum reported value was 19.6 µg/L. Learn more about HAA5 (five regulated haloacetic acids).

ND-2 3131 Auto Center Cir Distribution System	10/16/2019 68 months ago	19.27 µg/L Meets Reporting Threshold
ND-4 9498 Glacier Point Dr Distribution System	10/16/2019 68 months ago	17.1 µg/L Meets Reporting Threshold
ND-9 142 Marilyn Ave Distribution System	10/16/2019 68 months ago	11.45 µg/L Meets Reporting Threshold
ND-10 8420 Galloway Ct B Distribution System	10/16/2019 68 months ago	16.1 µg/L Meets Reporting Threshold
ND-12 1415 Chelsea Way Distribution System	10/16/2019 68 months ago	18.06 µg/L Meets Reporting Threshold
ND-16 10481 River Oaks Dr Distribution System	10/16/2019 68 months ago	15.25 µg/L Meets Reporting Threshold
ND-18 5703 Westchester Cir Distribution System	10/16/2019 68 months ago	18.93 µg/L Meets Reporting Threshold
ND-20 3102 Valley Forge Dr Distribution System	10/16/2019 68 months ago	19.6 µg/L Meets Reporting Threshold
ND-21 7339 Parkwoods Dr Distribution System	10/16/2019 68 months ago	13.67 µg/L Meets Reporting Threshold
ND-25 5376 Feather River Dr Distribution System	10/16/2019 68 months ago	18.64 µg/L Meets Reporting Threshold
ND-27 4046 Pine Lake Cir Distribution System	10/16/2019 68 months ago	17.95 µg/L Meets Reporting Threshold
ND-29 2161 Canyon Creek Cir Distribution System	10/16/2019 68 months ago	14.81 µg/L Meets Reporting Threshold
ND-30 5151 Pacific Ave Distribution System	10/16/2019 68 months ago	11.18 µg/L Meets Reporting Threshold
SD-4 500 W Hospital Rd Distribution System	10/16/2019 68 months ago	7.6 µg/L Meets Reporting Threshold
SD-5 1976 Universal Lane Distribution System	10/16/2019 68 months ago	8 µg/L Meets Reporting Threshold
SD-6 3350 Nautical Ct Distribution System	10/16/2019 68 months ago	8.8 µg/L Meets Reporting Threshold
WD-1 1050 Diamond St Distribution System	10/16/2019 68 months ago	9.5 µg/L Meets Reporting Threshold
Res-2 NW Reservoir Distribution System	10/16/2019 68 months ago	18.29 µg/L Meets Reporting Threshold
Res-3 Weston Ranch Reservoir Distribution System	10/16/2019 68 months ago	8.3 µg/L Meets Reporting Threshold

HAA6Br (six brominated haloacetic acids)

HAA6Br (six brominated haloacetic acids) are a class of Disinfection Byproducts that includes Bromochloroacetic Acid, Bromodichloroacetic Acid, Dibromoacetic Acid, Dibromochloroacetic Acid, Monobromoacetic Acid, Tribromoacetic Acid and has a minimum reporting level of 0 µg/L and is a potential threat to human health. Learn more about HAA6Br (six brominated haloacetic acids).

ND-2 3131 Auto Center Cir Distribution System	10/16/2019 68 months ago	4.88 µg/L
ND-4 9498 Glacier Point Dr Distribution System	10/16/2019 68 months ago	4.64 µg/L
ND-9 142 Marilyn Ave Distribution System	10/16/2019 68 months ago	3.93 µg/L
ND-10 8420 Galloway Ct B Distribution System	10/16/2019 68 months ago	5.54 µg/L
ND-12 1415 Chelsea Way Distribution System	10/16/2019 68 months ago	5.36 µg/L
ND-16 10481 River Oaks Dr Distribution System	10/16/2019 68 months ago	5.06 µg/L
ND-18 5703 Westchester Cir Distribution System	10/16/2019 68 months ago	5.22 µg/L
ND-20 3102 Valley Forge Dr Distribution System	10/16/2019 68 months ago	5.34 µg/L
ND-21 7339 Parkwoods Dr Distribution System	10/16/2019 68 months ago	4.71 µg/L
ND-25 5376 Feather River Dr Distribution System	10/16/2019 68 months ago	5.32 µg/L
ND-27 4046 Pine Lake Cir Distribution System	10/16/2019 68 months ago	4.97 µg/L
ND-29 2161 Canyon Creek Cir Distribution System	10/16/2019 68 months ago	3.83 µg/L
ND-30 5151 Pacific Ave Distribution System	10/16/2019 68 months ago	3.23 µg/L
SD-4 500 W Hospital Rd Distribution System	10/16/2019 68 months ago	0 µg/L
SD-5 1976 Universal Lane Distribution System	10/16/2019 68 months ago	.33 µg/L
SD-6 3350 Nautical Ct Distribution System	10/16/2019 68 months ago	.32 µg/L
WD-1 1050 Diamond St Distribution System	10/16/2019 68 months ago	.37 µg/L
Res-2 NW Reservoir Distribution System	10/16/2019 68 months ago	5.19 µg/L
Res-3 Weston Ranch Reservoir Distribution System	10/16/2019 68 months ago	0 µg/L

HAA9 (nine haloacetic acids)

HAA9 (nine haloacetic acids) are a class of Disinfection Byproducts that includes Bromochloroacetic Acid, Bromodichloroacetic Acid, Chlorodibromoacetic Acid, Dibromoacetic Acid, Dichloroacetic Acid, Monobromoacetic Acid, Monochloroacetic Acid, Tribromoacetic Acid, Trichloroacetic Acid and has a minimum reporting level of 0 µg/L and is a potential threat to human health. Learn more about HAA9 (nine haloacetic acids).

ND-2 3131 Auto Center Cir Distribution System	10/16/2019 68 months ago	23.78 µg/L
ND-4 9498 Glacier Point Dr Distribution System	10/16/2019 68 months ago	21.34 µg/L
ND-9 142 Marilyn Ave Distribution System	10/16/2019 68 months ago	14.73 µg/L
ND-10 8420 Galloway Ct B Distribution System	10/16/2019 68 months ago	20.94 µg/L
ND-12 1415 Chelsea Way Distribution System	10/16/2019 68 months ago	22.76 µg/L
ND-16 10481 River Oaks Dr Distribution System	10/16/2019 68 months ago	19.66 µg/L
ND-18 5703 Westchester Cir Distribution System	10/16/2019 68 months ago	23.42 µg/L
ND-20 3102 Valley Forge Dr Distribution System	10/16/2019 68 months ago	24.24 µg/L
ND-21 7339 Parkwoods Dr Distribution System	10/16/2019 68 months ago	17.71 µg/L
ND-25 5376 Feather River Dr Distribution System	10/16/2019 68 months ago	23.42 µg/L
ND-27 4046 Pine Lake Cir Distribution System	10/16/2019 68 months ago	22.27 µg/L
ND-29 2161 Canyon Creek Cir Distribution System	10/16/2019 68 months ago	18.13 µg/L
ND-30 5151 Pacific Ave Distribution System	10/16/2019 68 months ago	13.93 µg/L
SD-4 500 W Hospital Rd Distribution System	10/16/2019 68 months ago	7.6 µg/L
SD-5 1976 Universal Lane Distribution System	10/16/2019 68 months ago	8.33 µg/L
SD-6 3350 Nautical Ct Distribution System	10/16/2019 68 months ago	9.12 µg/L
WD-1 1050 Diamond St Distribution System	10/16/2019 68 months ago	9.87 µg/L
Res-2 NW Reservoir Distribution System	10/16/2019 68 months ago	22.49 µg/L
Res-3 Weston Ranch Reservoir Distribution System	10/16/2019 68 months ago	8.3 µg/L

alpha-hexachlorocyclohexane

alpha-hexachlorocyclohexane is a chemical contaminant that has a reference level of 0.006 µg/L. All the latest water samples for City of Stockton showed levels of alpha-hexachlorocyclohexane that were below unsafe concentration levels. Learn more about alpha-hexachlorocyclohexane.

EP-26 4512 Frontier SEWD Intertie	11/19/2019 67 months ago	<0.01 µg/L Below Reporting Level
EP-25 303 Olympic Circle Cal Water Intertie	8/22/2019 70 months ago	<0.01 µg/L Below Reporting Level
EP-24 Finished Water Delta Water Supply Plant	11/19/2019 67 months ago	<0.01 µg/L Below Reporting Level
EP-08 Well 27 Treated Well 27	8/21/2019 70 months ago	<0.01 µg/L Below Reporting Level
EP-06 Well 21 Treated Well 21	8/21/2019 70 months ago	<0.01 µg/L Below Reporting Level
EP-04 Well 19 Treated Well 19	8/21/2019 70 months ago	<0.01 µg/L Below Reporting Level
EP-03 Well 18 Treated Well 18	8/21/2019 70 months ago	<0.01 µg/L Below Reporting Level
EP-13 Well 32 Treated Well 32	8/21/2019 70 months ago	<0.01 µg/L Below Reporting Level
EP-12 Well 31 Treated Well 31	8/21/2019 70 months ago	<0.01 µg/L Below Reporting Level
EP-11 Well 30 Treated Well 30	8/21/2019 70 months ago	<0.01 µg/L Below Reporting Level
EP-23 Well SSS9 Treated Well SSS9	8/22/2019 70 months ago	<0.01 µg/L Below Reporting Level
EP-10 Well 29 Treated Well 29	8/21/2019 70 months ago	<0.01 µg/L Below Reporting Level
EP-21 Well SSS3 Treated Well SSS3	8/22/2019 70 months ago	<0.01 µg/L Below Reporting Level
EP-01 Well 3R Treated Well 3R	8/21/2019 70 months ago	<0.01 µg/L Below Reporting Level
EP-02 Well 10R Treated Well 10-R	3/28/2019 75 months ago	<0.01 µg/L Below Reporting Level
EP-09 Well 28 Treated Well 28	8/21/2019 70 months ago	<0.01 µg/L Below Reporting Level

anatoxin-a

anatoxin-a is a chemical contaminant that is a potential threat to human health. Learn more about anatoxin-a.

EP-26 4512 Frontier SEWD Intertie	10/15/2019 68 months ago	<0.03 µg/L Below Reporting Level
EP-24 Finished Water Delta Water Supply Plant	10/15/2019 68 months ago	<0.03 µg/L Below Reporting Level

Butylated Hydroxyanisole

Butylated Hydroxyanisole is a chemical contaminant that is a potential threat to human health. Learn more about Butylated Hydroxyanisole.

EP-26 4512 Frontier SEWD Intertie	11/19/2019 67 months ago	<0.03 µg/L Below Reporting Level
EP-25 303 Olympic Circle Cal Water Intertie	8/22/2019 70 months ago	<0.03 µg/L Below Reporting Level
EP-24 Finished Water Delta Water Supply Plant	11/19/2019 67 months ago	<0.03 µg/L Below Reporting Level
EP-08 Well 27 Treated Well 27	8/21/2019 70 months ago	<0.03 µg/L Below Reporting Level
EP-06 Well 21 Treated Well 21	8/21/2019 70 months ago	<0.03 µg/L Below Reporting Level
EP-04 Well 19 Treated Well 19	8/21/2019 70 months ago	<0.03 µg/L Below Reporting Level
EP-03 Well 18 Treated Well 18	8/21/2019 70 months ago	<0.03 µg/L Below Reporting Level
EP-13 Well 32 Treated Well 32	8/21/2019 70 months ago	<0.03 µg/L Below Reporting Level
EP-12 Well 31 Treated Well 31	8/21/2019 70 months ago	<0.03 µg/L Below Reporting Level
EP-11 Well 30 Treated Well 30	8/21/2019 70 months ago	<0.03 µg/L Below Reporting Level
EP-23 Well SSS9 Treated Well SSS9	8/22/2019 70 months ago	<0.03 µg/L Below Reporting Level
EP-10 Well 29 Treated Well 29	8/21/2019 70 months ago	<0.03 µg/L Below Reporting Level
EP-21 Well SSS3 Treated Well SSS3	8/22/2019 70 months ago	<0.03 µg/L Below Reporting Level
EP-01 Well 3R Treated Well 3R	8/21/2019 70 months ago	<0.03 µg/L Below Reporting Level
EP-02 Well 10R Treated Well 10-R	2/20/2019 76 months ago	<0.03 µg/L Below Reporting Level
EP-09 Well 28 Treated Well 28	8/21/2019 70 months ago	<0.03 µg/L Below Reporting Level

chlorpyrifos

chlorpyrifos is a chemical contaminant that has a reference level of 2 µg/L. All the latest water samples for City of Stockton showed levels of chlorpyrifos that were below unsafe concentration levels. Learn more about chlorpyrifos.

EP-26 4512 Frontier SEWD Intertie	11/19/2019 67 months ago	<0.03 µg/L Below Reporting Level
EP-25 303 Olympic Circle Cal Water Intertie	8/22/2019 70 months ago	<0.03 µg/L Below Reporting Level
EP-24 Finished Water Delta Water Supply Plant	11/19/2019 67 months ago	<0.03 µg/L Below Reporting Level
EP-08 Well 27 Treated Well 27	8/21/2019 70 months ago	<0.03 µg/L Below Reporting Level
EP-06 Well 21 Treated Well 21	8/21/2019 70 months ago	<0.03 µg/L Below Reporting Level
EP-04 Well 19 Treated Well 19	8/21/2019 70 months ago	<0.03 µg/L Below Reporting Level
EP-03 Well 18 Treated Well 18	8/21/2019 70 months ago	<0.03 µg/L Below Reporting Level
EP-13 Well 32 Treated Well 32	8/21/2019 70 months ago	<0.03 µg/L Below Reporting Level
EP-12 Well 31 Treated Well 31	8/21/2019 70 months ago	<0.03 µg/L Below Reporting Level
EP-11 Well 30 Treated Well 30	8/21/2019 70 months ago	<0.03 µg/L Below Reporting Level
EP-23 Well SSS9 Treated Well SSS9	8/22/2019 70 months ago	<0.03 µg/L Below Reporting Level
EP-10 Well 29 Treated Well 29	8/21/2019 70 months ago	<0.03 µg/L Below Reporting Level
EP-21 Well SSS3 Treated Well SSS3	8/22/2019 70 months ago	<0.03 µg/L Below Reporting Level
EP-01 Well 3R Treated Well 3R	8/21/2019 70 months ago	<0.03 µg/L Below Reporting Level
EP-02 Well 10R Treated Well 10-R	3/28/2019 75 months ago	<0.03 µg/L Below Reporting Level
EP-09 Well 28 Treated Well 28	8/21/2019 70 months ago	<0.03 µg/L Below Reporting Level

cylindrospermopsin

cylindrospermopsin is a chemical contaminant that has a reference level of 0.7 µg/L. All the latest water samples for City of Stockton showed levels of cylindrospermopsin that were below unsafe concentration levels. Learn more about cylindrospermopsin.

EP-26 4512 Frontier SEWD Intertie	10/15/2019 68 months ago	<0.09 µg/L Below Reporting Level
EP-24 Finished Water Delta Water Supply Plant	10/15/2019 68 months ago	<0.09 µg/L Below Reporting Level

dimethipin

dimethipin is a chemical contaminant that has a reference level of 140 µg/L. All the latest water samples for City of Stockton showed levels of dimethipin that were below unsafe concentration levels. Learn more about dimethipin.

EP-26 4512 Frontier SEWD Intertie	11/19/2019 67 months ago	<0.2 µg/L Below Reporting Level
EP-25 303 Olympic Circle Cal Water Intertie	8/22/2019 70 months ago	<0.2 µg/L Below Reporting Level
EP-24 Finished Water Delta Water Supply Plant	11/19/2019 67 months ago	<0.2 µg/L Below Reporting Level
EP-08 Well 27 Treated Well 27	8/21/2019 70 months ago	<0.2 µg/L Below Reporting Level
EP-06 Well 21 Treated Well 21	8/21/2019 70 months ago	<0.2 µg/L Below Reporting Level
EP-04 Well 19 Treated Well 19	8/21/2019 70 months ago	<0.2 µg/L Below Reporting Level
EP-03 Well 18 Treated Well 18	8/21/2019 70 months ago	<0.2 µg/L Below Reporting Level
EP-13 Well 32 Treated Well 32	8/21/2019 70 months ago	<0.2 µg/L Below Reporting Level
EP-12 Well 31 Treated Well 31	8/21/2019 70 months ago	<0.2 µg/L Below Reporting Level
EP-11 Well 30 Treated Well 30	8/21/2019 70 months ago	<0.2 µg/L Below Reporting Level
EP-23 Well SSS9 Treated Well SSS9	8/22/2019 70 months ago	<0.2 µg/L Below Reporting Level
EP-10 Well 29 Treated Well 29	8/21/2019 70 months ago	<0.2 µg/L Below Reporting Level
EP-21 Well SSS3 Treated Well SSS3	8/22/2019 70 months ago	<0.2 µg/L Below Reporting Level
EP-01 Well 3R Treated Well 3R	8/21/2019 70 months ago	<0.2 µg/L Below Reporting Level
EP-02 Well 10R Treated Well 10-R	3/28/2019 75 months ago	<0.2 µg/L Below Reporting Level
EP-09 Well 28 Treated Well 28	8/21/2019 70 months ago	<0.2 µg/L Below Reporting Level

ethoprop

ethoprop is a chemical contaminant that has a reference level of 1.14 µg/L. All the latest water samples for City of Stockton showed levels of ethoprop that were below unsafe concentration levels. Learn more about ethoprop.

EP-26 4512 Frontier SEWD Intertie	11/19/2019 67 months ago	<0.03 µg/L Below Reporting Level
EP-25 303 Olympic Circle Cal Water Intertie	8/22/2019 70 months ago	<0.03 µg/L Below Reporting Level
EP-24 Finished Water Delta Water Supply Plant	11/19/2019 67 months ago	<0.03 µg/L Below Reporting Level
EP-08 Well 27 Treated Well 27	8/21/2019 70 months ago	<0.03 µg/L Below Reporting Level
EP-06 Well 21 Treated Well 21	8/21/2019 70 months ago	<0.03 µg/L Below Reporting Level
EP-04 Well 19 Treated Well 19	8/21/2019 70 months ago	<0.03 µg/L Below Reporting Level
EP-03 Well 18 Treated Well 18	8/21/2019 70 months ago	<0.03 µg/L Below Reporting Level
EP-13 Well 32 Treated Well 32	8/21/2019 70 months ago	<0.03 µg/L Below Reporting Level
EP-12 Well 31 Treated Well 31	8/21/2019 70 months ago	<0.03 µg/L Below Reporting Level
EP-11 Well 30 Treated Well 30	8/21/2019 70 months ago	<0.03 µg/L Below Reporting Level
EP-23 Well SSS9 Treated Well SSS9	8/22/2019 70 months ago	<0.03 µg/L Below Reporting Level
EP-10 Well 29 Treated Well 29	8/21/2019 70 months ago	<0.03 µg/L Below Reporting Level
EP-21 Well SSS3 Treated Well SSS3	8/22/2019 70 months ago	<0.03 µg/L Below Reporting Level
EP-01 Well 3R Treated Well 3R	8/21/2019 70 months ago	<0.03 µg/L Below Reporting Level
EP-02 Well 10R Treated Well 10-R	3/28/2019 75 months ago	<0.03 µg/L Below Reporting Level
EP-09 Well 28 Treated Well 28	8/21/2019 70 months ago	<0.03 µg/L Below Reporting Level

Germanium

Germanium is a chemical contaminant that is a potential threat to human health. Learn more about Germanium.

EP-26 4512 Frontier SEWD Intertie	11/19/2019 67 months ago	<0.3 µg/L Below Reporting Level
EP-25 303 Olympic Circle Cal Water Intertie	8/22/2019 70 months ago	<0.3 µg/L Below Reporting Level
EP-24 Finished Water Delta Water Supply Plant	11/19/2019 67 months ago	<0.3 µg/L Below Reporting Level
EP-08 Well 27 Treated Well 27	8/21/2019 70 months ago	<0.3 µg/L Below Reporting Level
EP-06 Well 21 Treated Well 21	8/21/2019 70 months ago	<0.3 µg/L Below Reporting Level
EP-04 Well 19 Treated Well 19	8/21/2019 70 months ago	<0.3 µg/L Below Reporting Level
EP-03 Well 18 Treated Well 18	8/21/2019 70 months ago	<0.3 µg/L Below Reporting Level
EP-13 Well 32 Treated Well 32	8/21/2019 70 months ago	<0.3 µg/L Below Reporting Level
EP-12 Well 31 Treated Well 31	8/21/2019 70 months ago	<0.3 µg/L Below Reporting Level
EP-11 Well 30 Treated Well 30	8/21/2019 70 months ago	<0.3 µg/L Below Reporting Level
EP-23 Well SSS9 Treated Well SSS9	8/22/2019 70 months ago	<0.3 µg/L Below Reporting Level
EP-10 Well 29 Treated Well 29	8/21/2019 70 months ago	<0.3 µg/L Below Reporting Level
EP-21 Well SSS3 Treated Well SSS3	8/22/2019 70 months ago	<0.3 µg/L Below Reporting Level
EP-01 Well 3R Treated Well 3R	8/21/2019 70 months ago	<0.3 µg/L Below Reporting Level
EP-02 Well 10R Treated Well 10-R	2/20/2019 76 months ago	<0.3 µg/L Below Reporting Level
EP-09 Well 28 Treated Well 28	8/21/2019 70 months ago	<0.3 µg/L Below Reporting Level

Manganese

Manganese is a chemical contaminant that has a reference level of 300 µg/L. All the latest water samples for City of Stockton showed levels of Manganese that were below unsafe concentration levels. The maximum reported value was 77 µg/L. Learn more about Manganese.

EP-26 4512 Frontier SEWD Intertie	11/19/2019 67 months ago	1.2 µg/L Meets Reporting Threshold
EP-25 303 Olympic Circle Cal Water Intertie	8/22/2019 70 months ago	2.6 µg/L Meets Reporting Threshold
EP-24 Finished Water Delta Water Supply Plant	11/19/2019 67 months ago	3.2 µg/L Meets Reporting Threshold
EP-08 Well 27 Treated Well 27	8/21/2019 70 months ago	2 µg/L Meets Reporting Threshold
EP-06 Well 21 Treated Well 21	8/21/2019 70 months ago	3 µg/L Meets Reporting Threshold
EP-04 Well 19 Treated Well 19	8/21/2019 70 months ago	2.4 µg/L Meets Reporting Threshold
EP-03 Well 18 Treated Well 18	8/21/2019 70 months ago	20 µg/L Meets Reporting Threshold
EP-13 Well 32 Treated Well 32	8/21/2019 70 months ago	1.8 µg/L Meets Reporting Threshold
EP-12 Well 31 Treated Well 31	8/21/2019 70 months ago	<0.4 µg/L Below Reporting Level
EP-11 Well 30 Treated Well 30	8/21/2019 70 months ago	<0.4 µg/L Below Reporting Level
EP-23 Well SSS9 Treated Well SSS9	8/22/2019 70 months ago	7.9 µg/L Meets Reporting Threshold
EP-10 Well 29 Treated Well 29	8/21/2019 70 months ago	49 µg/L Meets Reporting Threshold
EP-21 Well SSS3 Treated Well SSS3	8/22/2019 70 months ago	77 µg/L Meets Reporting Threshold
EP-01 Well 3R Treated Well 3R	8/21/2019 70 months ago	11 µg/L Meets Reporting Threshold
EP-02 Well 10R Treated Well 10-R	2/20/2019 76 months ago	<0.4 µg/L Below Reporting Level
EP-09 Well 28 Treated Well 28	8/21/2019 70 months ago	2 µg/L Meets Reporting Threshold

o-toluidine

o-toluidine is a chemical contaminant that is a potential threat to human health. Learn more about o-toluidine.

EP-26 4512 Frontier SEWD Intertie	11/19/2019 67 months ago	<0.007 µg/L Below Reporting Level
EP-25 303 Olympic Circle Cal Water Intertie	8/22/2019 70 months ago	<0.007 µg/L Below Reporting Level
EP-24 Finished Water Delta Water Supply Plant	11/19/2019 67 months ago	<0.007 µg/L Below Reporting Level
EP-08 Well 27 Treated Well 27	8/21/2019 70 months ago	<0.007 µg/L Below Reporting Level
EP-06 Well 21 Treated Well 21	8/21/2019 70 months ago	<0.007 µg/L Below Reporting Level
EP-04 Well 19 Treated Well 19	8/21/2019 70 months ago	<0.007 µg/L Below Reporting Level
EP-03 Well 18 Treated Well 18	8/21/2019 70 months ago	<0.007 µg/L Below Reporting Level
EP-13 Well 32 Treated Well 32	8/21/2019 70 months ago	<0.007 µg/L Below Reporting Level
EP-12 Well 31 Treated Well 31	8/21/2019 70 months ago	<0.007 µg/L Below Reporting Level
EP-11 Well 30 Treated Well 30	8/21/2019 70 months ago	<0.007 µg/L Below Reporting Level
EP-23 Well SSS9 Treated Well SSS9	8/22/2019 70 months ago	<0.007 µg/L Below Reporting Level
EP-10 Well 29 Treated Well 29	8/21/2019 70 months ago	<0.007 µg/L Below Reporting Level
EP-21 Well SSS3 Treated Well SSS3	8/22/2019 70 months ago	<0.007 µg/L Below Reporting Level
EP-01 Well 3R Treated Well 3R	8/21/2019 70 months ago	<0.007 µg/L Below Reporting Level
EP-02 Well 10R Treated Well 10-R	2/20/2019 76 months ago	<0.007 µg/L Below Reporting Level
EP-09 Well 28 Treated Well 28	8/21/2019 70 months ago	<0.007 µg/L Below Reporting Level

oxyfluorfen

oxyfluorfen is a chemical contaminant that has a reference level of 200 µg/L. All the latest water samples for City of Stockton showed levels of oxyfluorfen that were below unsafe concentration levels. Learn more about oxyfluorfen.

EP-26 4512 Frontier SEWD Intertie	11/19/2019 67 months ago	<0.05 µg/L Below Reporting Level
EP-25 303 Olympic Circle Cal Water Intertie	8/22/2019 70 months ago	<0.05 µg/L Below Reporting Level
EP-24 Finished Water Delta Water Supply Plant	11/19/2019 67 months ago	<0.05 µg/L Below Reporting Level
EP-08 Well 27 Treated Well 27	8/21/2019 70 months ago	<0.05 µg/L Below Reporting Level
EP-06 Well 21 Treated Well 21	8/21/2019 70 months ago	<0.05 µg/L Below Reporting Level
EP-04 Well 19 Treated Well 19	8/21/2019 70 months ago	<0.05 µg/L Below Reporting Level
EP-03 Well 18 Treated Well 18	8/21/2019 70 months ago	<0.05 µg/L Below Reporting Level
EP-13 Well 32 Treated Well 32	8/21/2019 70 months ago	<0.05 µg/L Below Reporting Level
EP-12 Well 31 Treated Well 31	8/21/2019 70 months ago	<0.05 µg/L Below Reporting Level
EP-11 Well 30 Treated Well 30	8/21/2019 70 months ago	<0.05 µg/L Below Reporting Level
EP-23 Well SSS9 Treated Well SSS9	8/22/2019 70 months ago	<0.05 µg/L Below Reporting Level
EP-10 Well 29 Treated Well 29	8/21/2019 70 months ago	<0.05 µg/L Below Reporting Level
EP-21 Well SSS3 Treated Well SSS3	8/22/2019 70 months ago	<0.05 µg/L Below Reporting Level
EP-01 Well 3R Treated Well 3R	8/21/2019 70 months ago	<0.05 µg/L Below Reporting Level
EP-02 Well 10R Treated Well 10-R	3/28/2019 75 months ago	<0.05 µg/L Below Reporting Level
EP-09 Well 28 Treated Well 28	8/21/2019 70 months ago	<0.05 µg/L Below Reporting Level

profenofos

profenofos is a chemical contaminant that has a reference level of 0.3 µg/L. All the latest water samples for City of Stockton showed levels of profenofos that were below unsafe concentration levels. Learn more about profenofos.

EP-26 4512 Frontier SEWD Intertie	11/19/2019 67 months ago	<0.3 µg/L Below Reporting Level
EP-25 303 Olympic Circle Cal Water Intertie	8/22/2019 70 months ago	<0.3 µg/L Below Reporting Level
EP-24 Finished Water Delta Water Supply Plant	11/19/2019 67 months ago	<0.3 µg/L Below Reporting Level
EP-08 Well 27 Treated Well 27	8/21/2019 70 months ago	<0.3 µg/L Below Reporting Level
EP-06 Well 21 Treated Well 21	8/21/2019 70 months ago	<0.3 µg/L Below Reporting Level
EP-04 Well 19 Treated Well 19	8/21/2019 70 months ago	<0.3 µg/L Below Reporting Level
EP-03 Well 18 Treated Well 18	8/21/2019 70 months ago	<0.3 µg/L Below Reporting Level
EP-13 Well 32 Treated Well 32	8/21/2019 70 months ago	<0.3 µg/L Below Reporting Level
EP-12 Well 31 Treated Well 31	8/21/2019 70 months ago	<0.3 µg/L Below Reporting Level
EP-11 Well 30 Treated Well 30	8/21/2019 70 months ago	<0.3 µg/L Below Reporting Level
EP-23 Well SSS9 Treated Well SSS9	8/22/2019 70 months ago	<0.3 µg/L Below Reporting Level
EP-10 Well 29 Treated Well 29	8/21/2019 70 months ago	<0.3 µg/L Below Reporting Level
EP-21 Well SSS3 Treated Well SSS3	8/22/2019 70 months ago	<0.3 µg/L Below Reporting Level
EP-01 Well 3R Treated Well 3R	8/21/2019 70 months ago	<0.3 µg/L Below Reporting Level
EP-02 Well 10R Treated Well 10-R	3/28/2019 75 months ago	<0.3 µg/L Below Reporting Level
EP-09 Well 28 Treated Well 28	8/21/2019 70 months ago	<0.3 µg/L Below Reporting Level

quinoline

quinoline is a chemical contaminant that has a reference level of 0.01 µg/L. All the latest water samples for City of Stockton showed levels of quinoline that were below unsafe concentration levels. Learn more about quinoline.

EP-26 4512 Frontier SEWD Intertie	11/19/2019 67 months ago	<0.02 µg/L Below Reporting Level
EP-25 303 Olympic Circle Cal Water Intertie	8/22/2019 70 months ago	<0.02 µg/L Below Reporting Level
EP-24 Finished Water Delta Water Supply Plant	11/19/2019 67 months ago	<0.02 µg/L Below Reporting Level
EP-08 Well 27 Treated Well 27	8/21/2019 70 months ago	<0.02 µg/L Below Reporting Level
EP-06 Well 21 Treated Well 21	8/21/2019 70 months ago	<0.02 µg/L Below Reporting Level
EP-04 Well 19 Treated Well 19	8/21/2019 70 months ago	<0.02 µg/L Below Reporting Level
EP-03 Well 18 Treated Well 18	8/21/2019 70 months ago	<0.02 µg/L Below Reporting Level
EP-13 Well 32 Treated Well 32	8/21/2019 70 months ago	<0.02 µg/L Below Reporting Level
EP-12 Well 31 Treated Well 31	8/21/2019 70 months ago	<0.02 µg/L Below Reporting Level
EP-11 Well 30 Treated Well 30	8/21/2019 70 months ago	<0.02 µg/L Below Reporting Level
EP-23 Well SSS9 Treated Well SSS9	8/22/2019 70 months ago	<0.02 µg/L Below Reporting Level
EP-10 Well 29 Treated Well 29	8/21/2019 70 months ago	<0.02 µg/L Below Reporting Level
EP-21 Well SSS3 Treated Well SSS3	8/22/2019 70 months ago	<0.02 µg/L Below Reporting Level
EP-01 Well 3R Treated Well 3R	8/21/2019 70 months ago	<0.02 µg/L Below Reporting Level
EP-02 Well 10R Treated Well 10-R	2/20/2019 76 months ago	<0.02 µg/L Below Reporting Level
EP-09 Well 28 Treated Well 28	8/21/2019 70 months ago	<0.02 µg/L Below Reporting Level

tebuconazole

tebuconazole is a chemical contaminant that has a reference level of 190 µg/L. All the latest water samples for City of Stockton showed levels of tebuconazole that were below unsafe concentration levels. Learn more about tebuconazole.

EP-26 4512 Frontier SEWD Intertie	11/19/2019 67 months ago	<0.2 µg/L Below Reporting Level
EP-25 303 Olympic Circle Cal Water Intertie	8/22/2019 70 months ago	<0.2 µg/L Below Reporting Level
EP-24 Finished Water Delta Water Supply Plant	11/19/2019 67 months ago	<0.2 µg/L Below Reporting Level
EP-08 Well 27 Treated Well 27	8/21/2019 70 months ago	<0.2 µg/L Below Reporting Level
EP-06 Well 21 Treated Well 21	8/21/2019 70 months ago	<0.2 µg/L Below Reporting Level
EP-04 Well 19 Treated Well 19	8/21/2019 70 months ago	<0.2 µg/L Below Reporting Level
EP-03 Well 18 Treated Well 18	8/21/2019 70 months ago	<0.2 µg/L Below Reporting Level
EP-13 Well 32 Treated Well 32	8/21/2019 70 months ago	<0.2 µg/L Below Reporting Level
EP-12 Well 31 Treated Well 31	8/21/2019 70 months ago	<0.2 µg/L Below Reporting Level
EP-11 Well 30 Treated Well 30	8/21/2019 70 months ago	<0.2 µg/L Below Reporting Level
EP-23 Well SSS9 Treated Well SSS9	8/22/2019 70 months ago	<0.2 µg/L Below Reporting Level
EP-10 Well 29 Treated Well 29	8/21/2019 70 months ago	<0.2 µg/L Below Reporting Level
EP-21 Well SSS3 Treated Well SSS3	8/22/2019 70 months ago	<0.2 µg/L Below Reporting Level
EP-01 Well 3R Treated Well 3R	8/21/2019 70 months ago	<0.2 µg/L Below Reporting Level
EP-02 Well 10R Treated Well 10-R	3/28/2019 75 months ago	<0.2 µg/L Below Reporting Level
EP-09 Well 28 Treated Well 28	8/21/2019 70 months ago	<0.2 µg/L Below Reporting Level

Total Microcystin

Total Microcystin is a chemical contaminant that has a reference level of 0.3 µg/L. All the latest water samples for City of Stockton showed levels of Total Microcystin that were below unsafe concentration levels. Learn more about Total Microcystin.

EP-26 4512 Frontier SEWD Intertie	10/15/2019 68 months ago	<0.3 µg/L Below Reporting Level
EP-24 Finished Water Delta Water Supply Plant	10/15/2019 68 months ago	<0.3 µg/L Below Reporting Level

Total Permethrin

Total Permethrin is a chemical contaminant that has a reference level of 3.344 µg/L. All the latest water samples for City of Stockton showed levels of Total Permethrin that were below unsafe concentration levels. Learn more about Total Permethrin.

EP-26 4512 Frontier SEWD Intertie	11/19/2019 67 months ago	<0.04 µg/L Below Reporting Level
EP-25 303 Olympic Circle Cal Water Intertie	8/22/2019 70 months ago	<0.04 µg/L Below Reporting Level
EP-24 Finished Water Delta Water Supply Plant	11/19/2019 67 months ago	<0.04 µg/L Below Reporting Level
EP-08 Well 27 Treated Well 27	8/21/2019 70 months ago	<0.04 µg/L Below Reporting Level
EP-06 Well 21 Treated Well 21	8/21/2019 70 months ago	<0.04 µg/L Below Reporting Level
EP-04 Well 19 Treated Well 19	8/21/2019 70 months ago	<0.04 µg/L Below Reporting Level
EP-03 Well 18 Treated Well 18	8/21/2019 70 months ago	<0.04 µg/L Below Reporting Level
EP-13 Well 32 Treated Well 32	8/21/2019 70 months ago	<0.04 µg/L Below Reporting Level
EP-12 Well 31 Treated Well 31	8/21/2019 70 months ago	<0.04 µg/L Below Reporting Level
EP-11 Well 30 Treated Well 30	8/21/2019 70 months ago	<0.04 µg/L Below Reporting Level
EP-23 Well SSS9 Treated Well SSS9	8/22/2019 70 months ago	<0.04 µg/L Below Reporting Level
EP-10 Well 29 Treated Well 29	8/21/2019 70 months ago	<0.04 µg/L Below Reporting Level
EP-21 Well SSS3 Treated Well SSS3	8/22/2019 70 months ago	<0.04 µg/L Below Reporting Level
EP-01 Well 3R Treated Well 3R	8/21/2019 70 months ago	<0.04 µg/L Below Reporting Level
EP-02 Well 10R Treated Well 10-R	3/28/2019 75 months ago	<0.04 µg/L Below Reporting Level
EP-09 Well 28 Treated Well 28	8/21/2019 70 months ago	<0.04 µg/L Below Reporting Level

tribufos

tribufos is a chemical contaminant that has a reference level of 0.6 µg/L. All the latest water samples for City of Stockton showed levels of tribufos that were below unsafe concentration levels. Learn more about tribufos.

EP-26 4512 Frontier SEWD Intertie	11/19/2019 67 months ago	<0.07 µg/L Below Reporting Level
EP-25 303 Olympic Circle Cal Water Intertie	8/22/2019 70 months ago	<0.07 µg/L Below Reporting Level
EP-24 Finished Water Delta Water Supply Plant	11/19/2019 67 months ago	<0.07 µg/L Below Reporting Level
EP-08 Well 27 Treated Well 27	8/21/2019 70 months ago	<0.07 µg/L Below Reporting Level
EP-06 Well 21 Treated Well 21	8/21/2019 70 months ago	<0.07 µg/L Below Reporting Level
EP-04 Well 19 Treated Well 19	8/21/2019 70 months ago	<0.07 µg/L Below Reporting Level
EP-03 Well 18 Treated Well 18	8/21/2019 70 months ago	<0.07 µg/L Below Reporting Level
EP-13 Well 32 Treated Well 32	8/21/2019 70 months ago	<0.07 µg/L Below Reporting Level
EP-12 Well 31 Treated Well 31	8/21/2019 70 months ago	<0.07 µg/L Below Reporting Level
EP-11 Well 30 Treated Well 30	8/21/2019 70 months ago	<0.07 µg/L Below Reporting Level
EP-23 Well SSS9 Treated Well SSS9	8/22/2019 70 months ago	<0.07 µg/L Below Reporting Level
EP-10 Well 29 Treated Well 29	8/21/2019 70 months ago	<0.07 µg/L Below Reporting Level
EP-21 Well SSS3 Treated Well SSS3	8/22/2019 70 months ago	<0.07 µg/L Below Reporting Level
EP-01 Well 3R Treated Well 3R	8/21/2019 70 months ago	<0.07 µg/L Below Reporting Level
EP-02 Well 10R Treated Well 10-R	3/28/2019 75 months ago	<0.07 µg/L Below Reporting Level
EP-09 Well 28 Treated Well 28	8/21/2019 70 months ago	<0.07 µg/L Below Reporting Level

Sampling Facilities

Facility Name	Water Type/Source
SEWD Intertie	Surface Water (SW)
Cal Water Intertie	Ground Water (GW)
Delta Water Supply Plant	Surface Water (SW)
Well 27	Ground Water (GW)
Well 21	Ground Water (GW)
Well 19	Ground Water (GW)
Well 18	Ground Water (GW)
Well 32	Ground Water (GW)
Well 31	Ground Water (GW)
Well 30	Ground Water (GW)
Well SSS9	Ground Water (GW)
Well 29	Ground Water (GW)
Well SSS3	Ground Water (GW)
Well 3R	Ground Water (GW)
Well 10-R	Ground Water (GW)
Well 28	Ground Water (GW)
Distribution System	Multiple sources (MX)

FAQ

Is City of Stockton tap water safe to drink?

When was City of Stockton last tested for water contamination?

The latest water samples were taken between February 20th, 2019 and November 19th, 2019.