CA Water Service - Stockton (CA) Water Quality

CA Water Service - Stockton is a large public water system in EPA region 09 that provides tap water for the 95202 - 95207, 95211, 95212, 95219 zip codes. It has 20 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 CA Water Service - Stockton showed levels of 1-butanol that were below unsafe concentration levels. Learn more about 1-butanol.

EP #117 - STK-W-066-01-TR Well 66-1 (GWRMP)	7/2/2019 72 months ago	<2.0 µg/L Below Reporting Level
EP #115 - STK-W-062-01-CL Well 62-1	1/9/2019 78 months ago	<2.0 µg/L Below Reporting Level
EP #114 - STK-W-061-01-TR Well 61-1 (GWRMP)	7/2/2019 72 months ago	<2.0 µg/L Below Reporting Level
EP #113 - STK-W-060-01-TR Well 60-1 (GWRMP)	11/19/2019 68 months ago	<2.0 µg/L Below Reporting Level
EP #93 - STK-W-035-01-CL Well 35-1	7/10/2019 72 months ago	<2.0 µg/L Below Reporting Level
EP #83 - STK-W-036-01-AF Well 36-1 (GWRMP)	10/1/2019 69 months ago	<2.0 µg/L Below Reporting Level
EP #81 - STK-W-079-01-CL Well 79-1 (GWRMP)	9/1/2020 58 months ago	<2.0 µg/L Below Reporting Level
EP #75 - STK-W-007-02-CL Well 7-2 (GWRMP)	7/16/2019 72 months ago	<2.0 µg/L Below Reporting Level
STK-BL-W-SEWD Arsenic Blend	7/11/2019 72 months ago	<2.0 µg/L Below Reporting Level
STK-WS-001 SEWD Intertie	7/22/2019 72 months ago	<2.0 µg/L Below Reporting Level
STK-W-021-02-CL Well 21-02	7/29/2019 71 months ago	<2.0 µg/L Below Reporting Level
STK-W-087-01-CL Well 87-01-CL	7/15/2019 72 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 CA Water Service - Stockton showed levels of 2-methoxyethanol that were below unsafe concentration levels. Learn more about 2-methoxyethanol.

EP #117 - STK-W-066-01-TR Well 66-1 (GWRMP)	7/2/2019 72 months ago	<0.4 µg/L Below Reporting Level
EP #115 - STK-W-062-01-CL Well 62-1	1/9/2019 78 months ago	<0.4 µg/L Below Reporting Level
EP #114 - STK-W-061-01-TR Well 61-1 (GWRMP)	7/2/2019 72 months ago	<0.4 µg/L Below Reporting Level
EP #113 - STK-W-060-01-TR Well 60-1 (GWRMP)	11/19/2019 68 months ago	<0.4 µg/L Below Reporting Level
EP #93 - STK-W-035-01-CL Well 35-1	7/10/2019 72 months ago	<0.4 µg/L Below Reporting Level
EP #83 - STK-W-036-01-AF Well 36-1 (GWRMP)	10/1/2019 69 months ago	<0.4 µg/L Below Reporting Level
EP #81 - STK-W-079-01-CL Well 79-1 (GWRMP)	9/1/2020 58 months ago	<0.4 µg/L Below Reporting Level
EP #75 - STK-W-007-02-CL Well 7-2 (GWRMP)	7/16/2019 72 months ago	<0.4 µg/L Below Reporting Level
STK-BL-W-SEWD Arsenic Blend	7/11/2019 72 months ago	<0.4 µg/L Below Reporting Level
STK-WS-001 SEWD Intertie	7/22/2019 72 months ago	<0.4 µg/L Below Reporting Level
STK-W-021-02-CL Well 21-02	7/29/2019 71 months ago	<0.4 µg/L Below Reporting Level
STK-W-087-01-CL Well 87-01-CL	7/15/2019 72 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 CA Water Service - 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 #117 - STK-W-066-01-TR Well 66-1 (GWRMP)	7/2/2019 72 months ago	<0.5 µg/L Below Reporting Level
EP #115 - STK-W-062-01-CL Well 62-1	1/9/2019 78 months ago	<0.5 µg/L Below Reporting Level
EP #114 - STK-W-061-01-TR Well 61-1 (GWRMP)	7/2/2019 72 months ago	<0.5 µg/L Below Reporting Level
EP #113 - STK-W-060-01-TR Well 60-1 (GWRMP)	11/19/2019 68 months ago	<0.5 µg/L Below Reporting Level
EP #93 - STK-W-035-01-CL Well 35-1	7/10/2019 72 months ago	<0.5 µg/L Below Reporting Level
EP #83 - STK-W-036-01-AF Well 36-1 (GWRMP)	10/1/2019 69 months ago	<0.5 µg/L Below Reporting Level
EP #81 - STK-W-079-01-CL Well 79-1 (GWRMP)	9/1/2020 58 months ago	<0.5 µg/L Below Reporting Level
EP #75 - STK-W-007-02-CL Well 7-2 (GWRMP)	7/16/2019 72 months ago	<0.5 µg/L Below Reporting Level
STK-BL-W-SEWD Arsenic Blend	7/11/2019 72 months ago	<0.5 µg/L Below Reporting Level
STK-WS-001 SEWD Intertie	7/22/2019 72 months ago	<0.5 µg/L Below Reporting Level
STK-W-021-02-CL Well 21-02	7/29/2019 71 months ago	<0.5 µg/L Below Reporting Level
STK-W-087-01-CL Well 87-01-CL	7/15/2019 72 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 CA Water Service - Stockton showed levels of HAA5 (five regulated haloacetic acids) that were below unsafe concentration levels. The maximum reported value was 12.4 µg/L. Learn more about HAA5 (five regulated haloacetic acids).

STK-D-006 Distribution System	7/25/2019 72 months ago	8.7 µg/L Meets Reporting Threshold
STK-D-007 Distribution System	7/25/2019 72 months ago	8.9 µg/L Meets Reporting Threshold
STK-D-012 Distribution System	7/25/2019 72 months ago	9.1 µg/L Meets Reporting Threshold
STK-D-026 Distribution System	7/25/2019 72 months ago	9.1 µg/L Meets Reporting Threshold
STK-D-032 Distribution System	7/18/2019 72 months ago	10.3 µg/L Meets Reporting Threshold
STK-D-038 Distribution System	7/18/2019 72 months ago	11.8 µg/L Meets Reporting Threshold
STK-D-041 Distribution System	7/18/2019 72 months ago	12.4 µg/L Meets Reporting Threshold
STK-BL-W-SEWD Distribution System	7/18/2019 72 months ago	8.7 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).

STK-D-006 Distribution System	7/25/2019 72 months ago	.55 µg/L
STK-D-007 Distribution System	7/25/2019 72 months ago	.49 µg/L
STK-D-012 Distribution System	7/25/2019 72 months ago	1.03 µg/L
STK-D-026 Distribution System	7/25/2019 72 months ago	.5 µg/L
STK-D-032 Distribution System	7/18/2019 72 months ago	1.2 µg/L
STK-D-038 Distribution System	7/18/2019 72 months ago	1.12 µg/L
STK-D-041 Distribution System	7/18/2019 72 months ago	1.09 µg/L
STK-BL-W-SEWD Distribution System	7/18/2019 72 months ago	.45 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).

STK-D-006 Distribution System	7/25/2019 72 months ago	9.25 µg/L
STK-D-007 Distribution System	7/25/2019 72 months ago	9.39 µg/L
STK-D-012 Distribution System	7/25/2019 72 months ago	10.13 µg/L
STK-D-026 Distribution System	7/25/2019 72 months ago	9.6 µg/L
STK-D-032 Distribution System	7/18/2019 72 months ago	11.5 µg/L
STK-D-038 Distribution System	7/18/2019 72 months ago	12.92 µg/L
STK-D-041 Distribution System	7/18/2019 72 months ago	13.49 µg/L
STK-BL-W-SEWD Distribution System	7/18/2019 72 months ago	9.15 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 CA Water Service - Stockton showed levels of alpha-hexachlorocyclohexane that were below unsafe concentration levels. Learn more about alpha-hexachlorocyclohexane.

EP #117 - STK-W-066-01-TR Well 66-1 (GWRMP)	7/2/2019 72 months ago	<0.01 µg/L Below Reporting Level
EP #115 - STK-W-062-01-CL Well 62-1	1/9/2019 78 months ago	<0.01 µg/L Below Reporting Level
EP #114 - STK-W-061-01-TR Well 61-1 (GWRMP)	7/2/2019 72 months ago	<0.01 µg/L Below Reporting Level
EP #113 - STK-W-060-01-TR Well 60-1 (GWRMP)	11/19/2019 68 months ago	<0.01 µg/L Below Reporting Level
EP #93 - STK-W-035-01-CL Well 35-1	7/10/2019 72 months ago	<0.01 µg/L Below Reporting Level
EP #83 - STK-W-036-01-AF Well 36-1 (GWRMP)	10/1/2019 69 months ago	<0.01 µg/L Below Reporting Level
EP #81 - STK-W-079-01-CL Well 79-1 (GWRMP)	9/1/2020 58 months ago	<0.01 µg/L Below Reporting Level
EP #75 - STK-W-007-02-CL Well 7-2 (GWRMP)	7/16/2019 72 months ago	<0.01 µg/L Below Reporting Level
STK-BL-W-SEWD Arsenic Blend	7/22/2019 72 months ago	<0.01 µg/L Below Reporting Level
STK-WS-001 SEWD Intertie	8/6/2019 71 months ago	<0.01 µg/L Below Reporting Level
STK-W-021-02-CL Well 21-02	7/29/2019 71 months ago	<0.01 µg/L Below Reporting Level
STK-W-087-01-CL Well 87-01-CL	7/25/2019 72 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.

STK-WS-001 SEWD Intertie	11/20/2018 80 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 #117 - STK-W-066-01-TR Well 66-1 (GWRMP)	7/2/2019 72 months ago	<0.03 µg/L Below Reporting Level
EP #115 - STK-W-062-01-CL Well 62-1	1/9/2019 78 months ago	<0.03 µg/L Below Reporting Level
EP #114 - STK-W-061-01-TR Well 61-1 (GWRMP)	7/2/2019 72 months ago	<0.03 µg/L Below Reporting Level
EP #113 - STK-W-060-01-TR Well 60-1 (GWRMP)	11/19/2019 68 months ago	<0.03 µg/L Below Reporting Level
EP #93 - STK-W-035-01-CL Well 35-1	7/10/2019 72 months ago	<0.03 µg/L Below Reporting Level
EP #83 - STK-W-036-01-AF Well 36-1 (GWRMP)	10/1/2019 69 months ago	<0.03 µg/L Below Reporting Level
EP #81 - STK-W-079-01-CL Well 79-1 (GWRMP)	9/1/2020 58 months ago	<0.03 µg/L Below Reporting Level
EP #75 - STK-W-007-02-CL Well 7-2 (GWRMP)	7/16/2019 72 months ago	<0.03 µg/L Below Reporting Level
STK-BL-W-SEWD Arsenic Blend	7/11/2019 72 months ago	<0.03 µg/L Below Reporting Level
STK-WS-001 SEWD Intertie	7/22/2019 72 months ago	<0.03 µg/L Below Reporting Level
STK-W-021-02-CL Well 21-02	7/17/2019 72 months ago	<0.03 µg/L Below Reporting Level
STK-W-087-01-CL Well 87-01-CL	7/15/2019 72 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 CA Water Service - Stockton showed levels of chlorpyrifos that were below unsafe concentration levels. Learn more about chlorpyrifos.

EP #117 - STK-W-066-01-TR Well 66-1 (GWRMP)	7/2/2019 72 months ago	<0.03 µg/L Below Reporting Level
EP #115 - STK-W-062-01-CL Well 62-1	1/9/2019 78 months ago	<0.03 µg/L Below Reporting Level
EP #114 - STK-W-061-01-TR Well 61-1 (GWRMP)	7/2/2019 72 months ago	<0.03 µg/L Below Reporting Level
EP #113 - STK-W-060-01-TR Well 60-1 (GWRMP)	11/19/2019 68 months ago	<0.03 µg/L Below Reporting Level
EP #93 - STK-W-035-01-CL Well 35-1	7/10/2019 72 months ago	<0.03 µg/L Below Reporting Level
EP #83 - STK-W-036-01-AF Well 36-1 (GWRMP)	10/1/2019 69 months ago	<0.03 µg/L Below Reporting Level
EP #81 - STK-W-079-01-CL Well 79-1 (GWRMP)	9/1/2020 58 months ago	<0.03 µg/L Below Reporting Level
EP #75 - STK-W-007-02-CL Well 7-2 (GWRMP)	7/16/2019 72 months ago	<0.03 µg/L Below Reporting Level
STK-BL-W-SEWD Arsenic Blend	7/22/2019 72 months ago	<0.03 µg/L Below Reporting Level
STK-WS-001 SEWD Intertie	8/6/2019 71 months ago	<0.03 µg/L Below Reporting Level
STK-W-021-02-CL Well 21-02	7/29/2019 71 months ago	<0.03 µg/L Below Reporting Level
STK-W-087-01-CL Well 87-01-CL	7/25/2019 72 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 CA Water Service - Stockton showed levels of cylindrospermopsin that were below unsafe concentration levels. Learn more about cylindrospermopsin.

STK-WS-001 SEWD Intertie	11/20/2018 80 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 CA Water Service - Stockton showed levels of dimethipin that were below unsafe concentration levels. Learn more about dimethipin.

EP #117 - STK-W-066-01-TR Well 66-1 (GWRMP)	7/2/2019 72 months ago	<0.2 µg/L Below Reporting Level
EP #115 - STK-W-062-01-CL Well 62-1	1/9/2019 78 months ago	<0.2 µg/L Below Reporting Level
EP #114 - STK-W-061-01-TR Well 61-1 (GWRMP)	7/2/2019 72 months ago	<0.2 µg/L Below Reporting Level
EP #113 - STK-W-060-01-TR Well 60-1 (GWRMP)	11/19/2019 68 months ago	<0.2 µg/L Below Reporting Level
EP #93 - STK-W-035-01-CL Well 35-1	7/10/2019 72 months ago	<0.2 µg/L Below Reporting Level
EP #83 - STK-W-036-01-AF Well 36-1 (GWRMP)	10/1/2019 69 months ago	<0.2 µg/L Below Reporting Level
EP #81 - STK-W-079-01-CL Well 79-1 (GWRMP)	9/1/2020 58 months ago	<0.2 µg/L Below Reporting Level
EP #75 - STK-W-007-02-CL Well 7-2 (GWRMP)	7/16/2019 72 months ago	<0.2 µg/L Below Reporting Level
STK-BL-W-SEWD Arsenic Blend	7/22/2019 72 months ago	<0.2 µg/L Below Reporting Level
STK-WS-001 SEWD Intertie	8/6/2019 71 months ago	<0.2 µg/L Below Reporting Level
STK-W-021-02-CL Well 21-02	7/29/2019 71 months ago	<0.2 µg/L Below Reporting Level
STK-W-087-01-CL Well 87-01-CL	7/25/2019 72 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 CA Water Service - Stockton showed levels of ethoprop that were below unsafe concentration levels. Learn more about ethoprop.

EP #117 - STK-W-066-01-TR Well 66-1 (GWRMP)	7/2/2019 72 months ago	<0.03 µg/L Below Reporting Level
EP #115 - STK-W-062-01-CL Well 62-1	1/9/2019 78 months ago	<0.03 µg/L Below Reporting Level
EP #114 - STK-W-061-01-TR Well 61-1 (GWRMP)	7/2/2019 72 months ago	<0.03 µg/L Below Reporting Level
EP #113 - STK-W-060-01-TR Well 60-1 (GWRMP)	11/19/2019 68 months ago	<0.03 µg/L Below Reporting Level
EP #93 - STK-W-035-01-CL Well 35-1	7/10/2019 72 months ago	<0.03 µg/L Below Reporting Level
EP #83 - STK-W-036-01-AF Well 36-1 (GWRMP)	10/1/2019 69 months ago	<0.03 µg/L Below Reporting Level
EP #81 - STK-W-079-01-CL Well 79-1 (GWRMP)	9/1/2020 58 months ago	<0.03 µg/L Below Reporting Level
EP #75 - STK-W-007-02-CL Well 7-2 (GWRMP)	7/16/2019 72 months ago	<0.03 µg/L Below Reporting Level
STK-BL-W-SEWD Arsenic Blend	7/22/2019 72 months ago	<0.03 µg/L Below Reporting Level
STK-WS-001 SEWD Intertie	8/6/2019 71 months ago	<0.03 µg/L Below Reporting Level
STK-W-021-02-CL Well 21-02	7/29/2019 71 months ago	<0.03 µg/L Below Reporting Level
STK-W-087-01-CL Well 87-01-CL	7/25/2019 72 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 #117 - STK-W-066-01-TR Well 66-1 (GWRMP)	7/2/2019 72 months ago	<0.3 µg/L Below Reporting Level
EP #115 - STK-W-062-01-CL Well 62-1	1/9/2019 78 months ago	<0.3 µg/L Below Reporting Level
EP #114 - STK-W-061-01-TR Well 61-1 (GWRMP)	7/2/2019 72 months ago	1.6 µg/L
EP #113 - STK-W-060-01-TR Well 60-1 (GWRMP)	11/19/2019 68 months ago	<0.3 µg/L Below Reporting Level
EP #93 - STK-W-035-01-CL Well 35-1	7/10/2019 72 months ago	<0.3 µg/L Below Reporting Level
EP #83 - STK-W-036-01-AF Well 36-1 (GWRMP)	10/1/2019 69 months ago	2.5 µg/L
EP #81 - STK-W-079-01-CL Well 79-1 (GWRMP)	9/1/2020 58 months ago	<0.3 µg/L Below Reporting Level
EP #75 - STK-W-007-02-CL Well 7-2 (GWRMP)	7/16/2019 72 months ago	<0.3 µg/L Below Reporting Level
STK-BL-W-SEWD Arsenic Blend	7/11/2019 72 months ago	<0.3 µg/L Below Reporting Level
STK-WS-001 SEWD Intertie	7/22/2019 72 months ago	<0.3 µg/L Below Reporting Level
STK-W-021-02-CL Well 21-02	7/17/2019 72 months ago	<0.3 µg/L Below Reporting Level
STK-W-087-01-CL Well 87-01-CL	7/15/2019 72 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 CA Water Service - Stockton showed levels of Manganese that were below unsafe concentration levels. The maximum reported value was 100 µg/L. Learn more about Manganese.

EP #117 - STK-W-066-01-TR Well 66-1 (GWRMP)	7/2/2019 72 months ago	28 µg/L Meets Reporting Threshold
EP #115 - STK-W-062-01-CL Well 62-1	1/9/2019 78 months ago	100 µg/L Meets Reporting Threshold
EP #114 - STK-W-061-01-TR Well 61-1 (GWRMP)	7/2/2019 72 months ago	4 µg/L Meets Reporting Threshold
EP #113 - STK-W-060-01-TR Well 60-1 (GWRMP)	11/19/2019 68 months ago	4.1 µg/L Meets Reporting Threshold
EP #93 - STK-W-035-01-CL Well 35-1	7/10/2019 72 months ago	8 µg/L Meets Reporting Threshold
EP #83 - STK-W-036-01-AF Well 36-1 (GWRMP)	10/1/2019 69 months ago	10 µg/L Meets Reporting Threshold
EP #81 - STK-W-079-01-CL Well 79-1 (GWRMP)	9/1/2020 58 months ago	<0.4 µg/L Below Reporting Level
EP #75 - STK-W-007-02-CL Well 7-2 (GWRMP)	7/16/2019 72 months ago	<0.4 µg/L Below Reporting Level
STK-BL-W-SEWD Arsenic Blend	7/11/2019 72 months ago	5.6 µg/L Meets Reporting Threshold
STK-WS-001 SEWD Intertie	7/22/2019 72 months ago	7.4 µg/L Meets Reporting Threshold
STK-W-021-02-CL Well 21-02	7/17/2019 72 months ago	<0.4 µg/L Below Reporting Level
STK-W-087-01-CL Well 87-01-CL	7/15/2019 72 months ago	<0.4 µg/L Below Reporting Level

o-toluidine

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

EP #117 - STK-W-066-01-TR Well 66-1 (GWRMP)	7/2/2019 72 months ago	<0.007 µg/L Below Reporting Level
EP #115 - STK-W-062-01-CL Well 62-1	1/9/2019 78 months ago	<0.007 µg/L Below Reporting Level
EP #114 - STK-W-061-01-TR Well 61-1 (GWRMP)	7/2/2019 72 months ago	<0.007 µg/L Below Reporting Level
EP #113 - STK-W-060-01-TR Well 60-1 (GWRMP)	11/19/2019 68 months ago	<0.007 µg/L Below Reporting Level
EP #93 - STK-W-035-01-CL Well 35-1	7/10/2019 72 months ago	<0.007 µg/L Below Reporting Level
EP #83 - STK-W-036-01-AF Well 36-1 (GWRMP)	10/1/2019 69 months ago	<0.007 µg/L Below Reporting Level
EP #81 - STK-W-079-01-CL Well 79-1 (GWRMP)	9/1/2020 58 months ago	<0.007 µg/L Below Reporting Level
EP #75 - STK-W-007-02-CL Well 7-2 (GWRMP)	7/16/2019 72 months ago	<0.007 µg/L Below Reporting Level
STK-BL-W-SEWD Arsenic Blend	7/11/2019 72 months ago	<0.007 µg/L Below Reporting Level
STK-WS-001 SEWD Intertie	7/22/2019 72 months ago	<0.007 µg/L Below Reporting Level
STK-W-021-02-CL Well 21-02	7/17/2019 72 months ago	<0.007 µg/L Below Reporting Level
STK-W-087-01-CL Well 87-01-CL	7/15/2019 72 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 CA Water Service - Stockton showed levels of oxyfluorfen that were below unsafe concentration levels. Learn more about oxyfluorfen.

EP #117 - STK-W-066-01-TR Well 66-1 (GWRMP)	7/2/2019 72 months ago	<0.05 µg/L Below Reporting Level
EP #115 - STK-W-062-01-CL Well 62-1	1/9/2019 78 months ago	<0.05 µg/L Below Reporting Level
EP #114 - STK-W-061-01-TR Well 61-1 (GWRMP)	7/2/2019 72 months ago	<0.05 µg/L Below Reporting Level
EP #113 - STK-W-060-01-TR Well 60-1 (GWRMP)	11/19/2019 68 months ago	<0.05 µg/L Below Reporting Level
EP #93 - STK-W-035-01-CL Well 35-1	7/10/2019 72 months ago	<0.05 µg/L Below Reporting Level
EP #83 - STK-W-036-01-AF Well 36-1 (GWRMP)	10/1/2019 69 months ago	<0.05 µg/L Below Reporting Level
EP #81 - STK-W-079-01-CL Well 79-1 (GWRMP)	9/1/2020 58 months ago	<0.05 µg/L Below Reporting Level
EP #75 - STK-W-007-02-CL Well 7-2 (GWRMP)	7/16/2019 72 months ago	<0.05 µg/L Below Reporting Level
STK-BL-W-SEWD Arsenic Blend	7/22/2019 72 months ago	<0.05 µg/L Below Reporting Level
STK-WS-001 SEWD Intertie	8/6/2019 71 months ago	<0.05 µg/L Below Reporting Level
STK-W-021-02-CL Well 21-02	7/29/2019 71 months ago	<0.05 µg/L Below Reporting Level
STK-W-087-01-CL Well 87-01-CL	7/25/2019 72 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 CA Water Service - Stockton showed levels of profenofos that were below unsafe concentration levels. Learn more about profenofos.

EP #117 - STK-W-066-01-TR Well 66-1 (GWRMP)	7/2/2019 72 months ago	<0.3 µg/L Below Reporting Level
EP #115 - STK-W-062-01-CL Well 62-1	1/9/2019 78 months ago	<0.3 µg/L Below Reporting Level
EP #114 - STK-W-061-01-TR Well 61-1 (GWRMP)	7/2/2019 72 months ago	<0.3 µg/L Below Reporting Level
EP #113 - STK-W-060-01-TR Well 60-1 (GWRMP)	11/19/2019 68 months ago	<0.3 µg/L Below Reporting Level
EP #93 - STK-W-035-01-CL Well 35-1	7/10/2019 72 months ago	<0.3 µg/L Below Reporting Level
EP #83 - STK-W-036-01-AF Well 36-1 (GWRMP)	10/1/2019 69 months ago	<0.3 µg/L Below Reporting Level
EP #81 - STK-W-079-01-CL Well 79-1 (GWRMP)	9/1/2020 58 months ago	<0.3 µg/L Below Reporting Level
EP #75 - STK-W-007-02-CL Well 7-2 (GWRMP)	7/16/2019 72 months ago	<0.3 µg/L Below Reporting Level
STK-BL-W-SEWD Arsenic Blend	7/22/2019 72 months ago	<0.3 µg/L Below Reporting Level
STK-WS-001 SEWD Intertie	8/6/2019 71 months ago	<0.3 µg/L Below Reporting Level
STK-W-021-02-CL Well 21-02	7/29/2019 71 months ago	<0.3 µg/L Below Reporting Level
STK-W-087-01-CL Well 87-01-CL	7/25/2019 72 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 CA Water Service - Stockton showed levels of quinoline that were below unsafe concentration levels. Learn more about quinoline.

EP #117 - STK-W-066-01-TR Well 66-1 (GWRMP)	7/2/2019 72 months ago	<0.02 µg/L Below Reporting Level
EP #115 - STK-W-062-01-CL Well 62-1	1/9/2019 78 months ago	<0.02 µg/L Below Reporting Level
EP #114 - STK-W-061-01-TR Well 61-1 (GWRMP)	7/2/2019 72 months ago	<0.02 µg/L Below Reporting Level
EP #113 - STK-W-060-01-TR Well 60-1 (GWRMP)	11/19/2019 68 months ago	<0.02 µg/L Below Reporting Level
EP #93 - STK-W-035-01-CL Well 35-1	7/10/2019 72 months ago	<0.02 µg/L Below Reporting Level
EP #83 - STK-W-036-01-AF Well 36-1 (GWRMP)	10/1/2019 69 months ago	<0.02 µg/L Below Reporting Level
EP #81 - STK-W-079-01-CL Well 79-1 (GWRMP)	9/1/2020 58 months ago	<0.02 µg/L Below Reporting Level
EP #75 - STK-W-007-02-CL Well 7-2 (GWRMP)	7/16/2019 72 months ago	<0.02 µg/L Below Reporting Level
STK-BL-W-SEWD Arsenic Blend	7/11/2019 72 months ago	<0.02 µg/L Below Reporting Level
STK-WS-001 SEWD Intertie	7/22/2019 72 months ago	<0.02 µg/L Below Reporting Level
STK-W-021-02-CL Well 21-02	7/17/2019 72 months ago	<0.02 µg/L Below Reporting Level
STK-W-087-01-CL Well 87-01-CL	7/15/2019 72 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 CA Water Service - Stockton showed levels of tebuconazole that were below unsafe concentration levels. Learn more about tebuconazole.

EP #117 - STK-W-066-01-TR Well 66-1 (GWRMP)	7/2/2019 72 months ago	<0.2 µg/L Below Reporting Level
EP #115 - STK-W-062-01-CL Well 62-1	1/9/2019 78 months ago	<0.2 µg/L Below Reporting Level
EP #114 - STK-W-061-01-TR Well 61-1 (GWRMP)	7/2/2019 72 months ago	<0.2 µg/L Below Reporting Level
EP #113 - STK-W-060-01-TR Well 60-1 (GWRMP)	11/19/2019 68 months ago	<0.2 µg/L Below Reporting Level
EP #93 - STK-W-035-01-CL Well 35-1	7/10/2019 72 months ago	<0.2 µg/L Below Reporting Level
EP #83 - STK-W-036-01-AF Well 36-1 (GWRMP)	10/1/2019 69 months ago	<0.2 µg/L Below Reporting Level
EP #81 - STK-W-079-01-CL Well 79-1 (GWRMP)	9/1/2020 58 months ago	<0.2 µg/L Below Reporting Level
EP #75 - STK-W-007-02-CL Well 7-2 (GWRMP)	7/16/2019 72 months ago	<0.2 µg/L Below Reporting Level
STK-BL-W-SEWD Arsenic Blend	7/22/2019 72 months ago	<0.2 µg/L Below Reporting Level
STK-WS-001 SEWD Intertie	8/6/2019 71 months ago	<0.2 µg/L Below Reporting Level
STK-W-021-02-CL Well 21-02	7/29/2019 71 months ago	<0.2 µg/L Below Reporting Level
STK-W-087-01-CL Well 87-01-CL	7/25/2019 72 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 CA Water Service - Stockton showed levels of Total Microcystin that were below unsafe concentration levels. Learn more about Total Microcystin.

STK-WS-001 SEWD Intertie	11/20/2018 80 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 CA Water Service - Stockton showed levels of Total Permethrin that were below unsafe concentration levels. Learn more about Total Permethrin.

EP #117 - STK-W-066-01-TR Well 66-1 (GWRMP)	7/2/2019 72 months ago	<0.04 µg/L Below Reporting Level
EP #115 - STK-W-062-01-CL Well 62-1	1/9/2019 78 months ago	<0.04 µg/L Below Reporting Level
EP #114 - STK-W-061-01-TR Well 61-1 (GWRMP)	7/2/2019 72 months ago	<0.04 µg/L Below Reporting Level
EP #113 - STK-W-060-01-TR Well 60-1 (GWRMP)	11/19/2019 68 months ago	<0.04 µg/L Below Reporting Level
EP #93 - STK-W-035-01-CL Well 35-1	7/10/2019 72 months ago	<0.04 µg/L Below Reporting Level
EP #83 - STK-W-036-01-AF Well 36-1 (GWRMP)	10/1/2019 69 months ago	<0.04 µg/L Below Reporting Level
EP #81 - STK-W-079-01-CL Well 79-1 (GWRMP)	9/1/2020 58 months ago	<0.04 µg/L Below Reporting Level
EP #75 - STK-W-007-02-CL Well 7-2 (GWRMP)	7/16/2019 72 months ago	<0.04 µg/L Below Reporting Level
STK-BL-W-SEWD Arsenic Blend	7/22/2019 72 months ago	<0.04 µg/L Below Reporting Level
STK-WS-001 SEWD Intertie	8/6/2019 71 months ago	<0.04 µg/L Below Reporting Level
STK-W-021-02-CL Well 21-02	7/29/2019 71 months ago	<0.04 µg/L Below Reporting Level
STK-W-087-01-CL Well 87-01-CL	7/25/2019 72 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 CA Water Service - Stockton showed levels of tribufos that were below unsafe concentration levels. Learn more about tribufos.

EP #117 - STK-W-066-01-TR Well 66-1 (GWRMP)	7/2/2019 72 months ago	<0.07 µg/L Below Reporting Level
EP #115 - STK-W-062-01-CL Well 62-1	1/9/2019 78 months ago	<0.07 µg/L Below Reporting Level
EP #114 - STK-W-061-01-TR Well 61-1 (GWRMP)	7/2/2019 72 months ago	<0.07 µg/L Below Reporting Level
EP #113 - STK-W-060-01-TR Well 60-1 (GWRMP)	11/19/2019 68 months ago	<0.07 µg/L Below Reporting Level
EP #93 - STK-W-035-01-CL Well 35-1	7/10/2019 72 months ago	<0.07 µg/L Below Reporting Level
EP #83 - STK-W-036-01-AF Well 36-1 (GWRMP)	10/1/2019 69 months ago	<0.07 µg/L Below Reporting Level
EP #81 - STK-W-079-01-CL Well 79-1 (GWRMP)	9/1/2020 58 months ago	<0.07 µg/L Below Reporting Level
EP #75 - STK-W-007-02-CL Well 7-2 (GWRMP)	7/16/2019 72 months ago	<0.07 µg/L Below Reporting Level
STK-BL-W-SEWD Arsenic Blend	7/22/2019 72 months ago	<0.07 µg/L Below Reporting Level
STK-WS-001 SEWD Intertie	8/6/2019 71 months ago	<0.07 µg/L Below Reporting Level
STK-W-021-02-CL Well 21-02	7/29/2019 71 months ago	<0.07 µg/L Below Reporting Level
STK-W-087-01-CL Well 87-01-CL	7/25/2019 72 months ago	<0.07 µg/L Below Reporting Level

Sampling Facilities

Facility Name	Water Type/Source
Well 66-1 (GWRMP)	Ground Water (GW)
Well 62-1	Ground Water (GW)
Well 61-1 (GWRMP)	Ground Water (GW)
Well 60-1 (GWRMP)	Ground Water (GW)
Well 35-1	Ground Water (GW)
Well 36-1 (GWRMP)	Ground Water (GW)
Well 79-1 (GWRMP)	Ground Water (GW)
Well 7-2 (GWRMP)	Ground Water (GW)
Arsenic Blend	Multiple sources (MX)
SEWD Intertie	Surface Water (SW)
Well 21-02	Ground Water (GW)
Well 87-01-CL	Ground Water (GW)
Distribution System	Multiple sources (MX)
Distribution System	Multiple sources (MX)
Distribution System	Multiple sources (MX)
Distribution System	Multiple sources (MX)
Distribution System	Multiple sources (MX)
Distribution System	Multiple sources (MX)
Distribution System	Multiple sources (MX)
Distribution System	Multiple sources (MX)

FAQ

Is CA Water Service - Stockton tap water safe to drink?

When was CA Water Service - Stockton last tested for water contamination?

The latest water samples were taken between November 20th, 2018 and September 1st, 2020.