City of Modesto (CA) Water Quality

City of Modesto is a large public water system in EPA region 9 that provides tap water for the 95350, 95351, 95355 - 95358 zip codes. It has 163 facilities where the water supply was tested for 85 chemical contaminants that impact tap water quality and human health.

The maximum reported level of HAA5 (five regulated haloacetic acids) was 28 µg/L. The maximum reported level of Manganese was 110 µg/L. There were 2 contamintants found in the City of Modesto water supply at levels that were above the minimum reporting level.

Contaminants

1,1-dichloroethane (112)

1,2,3-trichloropropane (112)

1,3-butadiene (112)

1,4-dioxane (112)

1-butanol (80)

11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (86)

17-alpha-ethynylestradiol (112)

17-beta-estradiol (112)

1H,1H,2H,2H-perfluorodecane sulfonic acid (86)

1H,1H,2H,2H-perfluorohexane sulfonic acid (86)

1H,1H,2H,2H-perfluorooctane sulfonic acid (86)

2,4-dinitrotoluene (154)

2,6-dinitrotoluene (154)

2-methoxyethanol (80)

2-propen-1-ol (Allyl Alcohol) (80)

4,4'-dichloro dichlorophenyl ethylene (DDE) (154)

4,8-dioxa-3H-perfluorononanoic acid (86)

4-androstene-3,17-dione (112)

9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (86)

alpha-hexachlorocyclohexane (80)

anatoxin-a (8)

bromochloromethane (Halon 1011) (112)

bromomethane (112)

Butylated Hydroxyanisole (79)

chlorate (126)

chlorodifluoromethane (HCFC-22) (112)

chloromethane (112)

chlorpyrifos (80)

chromium (126)

chromium-6 (126)

cobalt (126)

cylindrospermopsin (8)

dimethipin (80)

dimethyl tetrachloroterephthalate (DCPA) mono/di-acid degradate (155)

equilin (112)

estriol (112)

estrone (112)

ethoprop (80)

Germanium (80)

HAA5 (five regulated haloacetic acids) (32)

HAA6Br (six brominated haloacetic acids) (32)

HAA9 (nine haloacetic acids) (32)

hexafluoropropylene oxide dimer acid (GenX) (86)

lithium (86)

Manganese (80)

methyl-tertiary-butyl-ether (MTBE) (153)

molinate (170)

molybdenum (126)

N-ethyl perfluorooctanesulfonamidoacetic acid (86)

N-methyl perfluorooctanesulfonamidoacetic acid (86)

nitrobenzene (153)

nonafluoro-3,6-dioxaheptanoic acid (86)

o-toluidine (79)

oxyfluorfen (80)

perchlorate (155)

perfluoro(2-ethoxyethane)sulfonic acid (86)

perfluoro-3-methoxypropanoic acid (86)

perfluoro-4-methoxybutanoic acid (86)

perfluorobutanesulfonic acid (198)

perfluorobutanoic acid (86)

perfluorodecanoic acid (86)

perfluorododecanoic acid (86)

perfluoroheptanesulfonic acid (86)

perfluoroheptanoic acid (198)

perfluorohexanesulfonic acid (198)

perfluorohexanoic acid (86)

perfluorononanoic acid (198)

perfluorooctanesulfonic acid (198)

perfluorooctanoic acid (198)

perfluoropentanesulfonic acid (86)

perfluoropentanoic acid (86)

perfluorotetradecanoic acid (86)

perfluorotridecanoic acid (86)

perfluoroundecanoic acid (86)

profenofos (80)

quinoline (79)

s-ethyl-dipropylthiocarbamate (EPTC) (170)

strontium (126)

tebuconazole (80)

terbacil (170)

testosterone (112)

total microcystins (8)

Total Permethrin (80)

tribufos (80)

vanadium (126)

Sampling Facilities

Well 67
Ground Water (GW)

EP for Well 67Entry Point to the Distribution System (EP)

Well 54
Ground Water (GW)

EP for Wells 54 & 52Entry Point to the Distribution System (EP)

Well 50
Ground Water (GW)

EP for Wells 43 & 50Entry Point to the Distribution System (EP)

Well 264
Ground Water (GW)

EP for Wells 264 & 262Entry Point to the Distribution System (EP)

Well 283
Ground Water (GW)

EP for Wells 283 & 236Entry Point to the Distribution System (EP)

Well 211
Ground Water (GW)

EP for Wells 211 & 36Entry Point to the Distribution System (EP)

Well 46
Ground Water (GW)

EP for Wells 62 & 46Entry Point to the Distribution System (EP)
EP for Well 62 and Well 46Entry Point to the Distribution System (EP)

Well 41
Ground Water (GW)

EP for Wells 41, 265 & 45Entry Point to the Distribution System (EP)

Well 269
Ground Water (GW)

EP for Wells 269 & 267Entry Point to the Distribution System (EP)

Well 212
Ground Water (GW)

EP for Wells 212, 279, 291 & 292Entry Point to the Distribution System (EP)

Well 57
Ground Water (GW)

EP for Wells 57, 4 & 1Entry Point to the Distribution System (EP)

Well 40
Ground Water (GW)

EP for Wells 40 & 204Entry Point to the Distribution System (EP)

Well 214
Ground Water (GW)

EP for Wells 284 & 214Entry Point to the Distribution System (EP)

Well 225
Ground Water (GW)

EP for Wells 225 & 307Entry Point to the Distribution System (EP)

Well 56
Ground Water (GW)

EP for Wells 56 & 241Entry Point to the Distribution System (EP)

Tank 3
Ground Water (GW)

EP for Wells 29 & 30Entry Point to the Distribution System (EP)

Tank 6
Ground Water (GW)

EP for Wells 301 & 304Entry Point to the Distribution System (EP)

Tank 7
Ground Water (GW)

EP for Well 38Entry Point to the Distribution System (EP)

Tank 8
Ground Water (GW)

EP for Wells 223 & 305Entry Point to the Distribution System (EP)

Well 25
Ground Water (GW)

EP for Well 25Entry Point to the Distribution System (EP)

Well 16
Ground Water (GW)

EP for Well 16Entry Point to the Distribution System (EP)

Well 7
Ground Water (GW)

EP for Well 7Entry Point to the Distribution System (EP)

Well 216
Ground Water (GW)

EP for Well 216Entry Point to the Distribution System (EP)

Well 287
Ground Water (GW)

EP for Well 287Entry Point to the Distribution System (EP)

Well 47
Ground Water (GW)

EP for Well 47Entry Point to the Distribution System (EP)

Well 300
Ground Water (GW)

EP for Well 300Entry Point to the Distribution System (EP)

Well 237
Ground Water (GW)

EP for Well 237Entry Point to the Distribution System (EP)

Well 217
Ground Water (GW)

EP for Well 217Entry Point to the Distribution System (EP)

Well 33
Ground Water (GW)

EP for Well 33Entry Point to the Distribution System (EP)

Well 39
Ground Water (GW)

EP for Well 39Entry Point to the Distribution System (EP)

Well 247
Ground Water (GW)

EP for Well 247Entry Point to the Distribution System (EP)

Well 59
Ground Water (GW)

EP for Well 59Entry Point to the Distribution System (EP)

Well 65
Ground Water (GW)

EP for Well 65Entry Point to the Distribution System (EP)

Well 58
Ground Water (GW)

EP for Well 58Entry Point to the Distribution System (EP)

Well 6
Ground Water (GW)

EP for Well 6Entry Point to the Distribution System (EP)

Well 48
Ground Water (GW)

EP for Well 48Entry Point to the Distribution System (EP)

Well 42
Ground Water (GW)

EP for Well 42Entry Point to the Distribution System (EP)

Well 259
Ground Water (GW)

EP for Well 259Entry Point to the Distribution System (EP)

Well 308
Ground Water (GW)

EP for Well 308Entry Point to the Distribution System (EP)

Well 49
Ground Water (GW)

EP for Well 49 BlendedEntry Point to the Distribution System (EP)

Surface Water TP
Surface Water (SW)

Terminal Reservoir Pump StationEntry Point to the Distribution System (EP)

Well 51
Ground Water (GW)

EP for Wells 51, 61, 63 & 64Entry Point to the Distribution System (EP)

Well 10
Ground Water (GW)

EP for Well 10Entry Point to the Distribution System (EP)

CS-115-OR
Multiple Sources (MX)

1812 Clarence DriveDistribution System (DS)

CS-521-OR
Multiple Sources (MX)

1240 Enslen AvenueDistribution System (DS)

CS-501-OR
Multiple Sources (MX)

2017 Robertson RoadDistribution System (DS)

CS-503-OR
Multiple Sources (MX)

925 Chicago AvenueDistribution System (DS)
925 Chicago AvenueMaximum Residence Time (MR)

CS-208-OR
Multiple Sources (MX)

1125 E. Fairmont AvenueDistribution System (DS)

CS-509-OR
Multiple Sources (MX)

1000 Vindel LaneDistribution System (DS)
1000 Vindel LaneMaximum Residence Time (MR)

CS-009-OR
Multiple Sources (MX)

4119 Veranda WayDistribution System (DS)

CS-057-OR
Multiple Sources (MX)

2400 Ustick RoadDistribution System (DS)

Well 17
Ground Water (GW)

EP for Well 17Entry Point to the Distribution System (EP)

Well 229
Ground Water (GW)

EP for Well 229Entry Point to the Distribution System (EP)

Well 232
Ground Water (GW)

EP for Well 232Entry Point to the Distribution System (EP)

Well 277
Ground Water (GW)

EP for Well 277Entry Point to the Distribution System (EP)

Well 278
Ground Water (GW)

EP for Well 278Entry Point to the Distribution System (EP)

Well 312
Ground Water (GW)

EP for Well 312Entry Point to the Distribution System (EP)

Well 310
Ground Water (GW)

EP for Well 310Entry Point to the Distribution System (EP)

EP- #222 WELL 058 - TREATED
Ground Water (GW)

ENTRY POINT FOR ONLY THIS WELLEntry Point to the Distribution System (EP)

EP- #217 WELL 265 - LINCOLN ESTATES - TREATED
Ground Water (GW)

REPRESENTATIVE ENTRY POINT TO 5 WELLSEntry Point to the Distribution System (EP)

EP- #214 WELL 264 - SHERWOOD FOREST - TREATED
Ground Water (GW)

REPRESENTATIVE ENTRY POINTEntry Point to the Distribution System (EP)

EP- #208 WELL 217 - BYSTROM - TREATED
Ground Water (GW)

REPRESENTATIVE ENTRY POINT TO 8 WELLSEntry Point to the Distribution System (EP)

EP- #201 WELL 237 - ELM - TREATED
Ground Water (GW)

REPRESENTATIVE ENTRY POINT for 3 wellsEntry Point to the Distribution System (EP)

EP- #122 WELL 004 - TREATED
Ground Water (GW)

REPRESENTATIVE ENTRY POINT TO 5 WELLSEntry Point to the Distribution System (EP)

EP- #120 WELL 006 - TREATED
Ground Water (GW)

REPRESENTATIVE ENTRY POINT TO 8 WELLSEntry Point to the Distribution System (EP)

EP- #110 WELL 016 - TREATED
Ground Water (GW)

REPRESENTATIVE ENTRY POINT TO 3 WELLSEntry Point to the Distribution System (EP)

EP- #086 WELL 042 - TREATED
Ground Water (GW)

REPRESENTATIVE ENTRY POINT TO 2 WELLSEntry Point to the Distribution System (EP)

EP- #080 WELL 048 - TREATED
Ground Water (GW)

REPRESENTATIVE ENTRY POINTEntry Point to the Distribution System (EP)

EP- #073 WELL 054 - TREATED
Ground Water (GW)

REPRESENTATIVE ENTRY POINTEntry Point to the Distribution System (EP)

EP- #167 WELL 211 - TREATED
Ground Water (GW)

REPRESENTATIVE ENTRY POINT TO 6 WELLSEntry Point to the Distribution System (EP)

EP - #160 WELL 277 TREATED
Ground Water (GW)

REPRESENTED BY 91873 (2)Entry Point to the Distribution System (EP)

EP- #157 WELL 308 - TREATED
Ground Water (GW)

ENTRY POINT FOR ONLY THIS WELLEntry Point to the Distribution System (EP)

EP- #156 WELL 310 - TREATED
Ground Water (GW)

REPRESENTATIVE ENTRY POINT FOR 9 WELLSEntry Point to the Distribution System (EP)

EP- #144 WELL 232 - TREATED
Ground Water (GW)

REPRESENTATIVE ENTRY POINTEntry Point to the Distribution System (EP)

EP- #174 WELL 292 - TREATED
Ground Water (GW)

REPRESENTATIVE ENTRY POINT TO 4 WELLSEntry Point to the Distribution System (EP)

EP-#066 Well 038-GAC treated
Ground Water (GW)

REPRESENTATIVE ENTRY POINT TO 6 WELLSEntry Point to the Distribution System (EP)

EP #300-Terminal Reservoir Pump Station
Surface Water (SW)

TRPSEntry Point to the Distribution System (EP)

WELL 001
Ground Water (GW)

WELL 001 03S/09E-28M01SR (SR)

WELL 002
Ground Water (GW)

WELL 002 03S/09E-29G01SR (SR)

WELL 003
Ground Water (GW)

WELL 003 03S/09E-29P01SR (SR)

WELL 004
Ground Water (GW)

WELL 004 03S/09E-32A01SR (SR)

WELL 006
Ground Water (GW)

WELL 006 03S/09E-28C01SR (SR)

WELL 007
Ground Water (GW)

WELL 007 03S/09E-29B01SR (SR)

WELL 008
Ground Water (GW)

WELL 008 03S/09E-29D02SR (SR)

WELL 010
Ground Water (GW)

WELL 010 03S/09E-32G01SR (SR)

WELL 014
Ground Water (GW)

WELL 014 03S/09E-20K01SR (SR)

WELL 016
Ground Water (GW)

WELL 016 03S/09E-17P01SR (SR)

WELL 017
Ground Water (GW)

WELL 017 03S/09E-20C01SR (SR)

WELL 018
Ground Water (GW)

WELL 018 03S/09E-22N01SR (SR)

WELL 021
Ground Water (GW)

WELL 021 03S/09E-16N02SR (SR)

WELL 022
Ground Water (GW)

WELL 022 03S/09E-19C01SR (SR)

WELL 024
Ground Water (GW)

WELL 024 03S/09E-17D01SR (SR)

WELL 025
Ground Water (GW)

WELL 025 03S/09E-08K01SR (SR)

WELL 029
Ground Water (GW)

WELL 029 04S/09E-05H01SR (SR)

WELL 030 - INACTIVE
Ground Water (GW)

WELL 030 - INACTIVE 04S/09E-05J01SR (SR)

WELL 032 - INACTIVE
Ground Water (GW)

WELL 032 - INACTIVE 03S/09E-23E01SR (SR)

WELL 033
Ground Water (GW)

WELL 033 03S/08E-13J01SR (SR)

WELL 034
Ground Water (GW)

WELL 034 03S/09E-30E01SR (SR)

WELL 036
Ground Water (GW)

WELL 036 03S/09E-28K01SR (SR)

WELL 037
Ground Water (GW)

WELL 037 03S/09E-15L01SR (SR)

WELL 038
Ground Water (GW)

WELL 038 04S/09E-16D02SR (SR)

WELL 039
Ground Water (GW)

WELL 039 03S/09E-10E01SR (SR)

WELL 040
Ground Water (GW)

WELL 040 03S/09E-26K01SR (SR)

WELL 041
Ground Water (GW)

WELL 041 03S/09E-24F01SR (SR)

WELL 042
Ground Water (GW)

WELL 042 03S/08E-11K01SR (SR)

WELL 043
Ground Water (GW)

WELL 043 03S/09E-07C02SR (SR)

WELL 045
Ground Water (GW)

WELL 045 03S/10E-19E01SR (SR)

WELL 046
Ground Water (GW)

WELL 046 03S/09E-14G01SR (SR)

WELL 047
Ground Water (GW)

WELL 047 03S/09E-25D01SR (SR)

WELL 048
Ground Water (GW)

WELL 048 03S/09E-05J03SR (SR)

WELL 049
Ground Water (GW)

WELL 049 04S/09E-08Q01SR (SR)

WELL 050 - INACTIVE
Ground Water (GW)

WELL 050 - INACTIVE 03S/09E-05N02SR (SR)

WELL 051
Ground Water (GW)

WELL 051 03S/08E-01M02SR (SR)

WELL 100
Ground Water (GW)

WELL 100 03S/09E-09D01SR (SR)

WELL 056
Ground Water (GW)

WELL 056 5010010-061SR (SR)

WELL 052
Ground Water (GW)

WELL 052 5010010-062SR (SR)

WELL 054
Ground Water (GW)

WELL 054 5010010-068SR (SR)

WELL 055
Ground Water (GW)

WELL 055 5010010-069SR (SR)

WELL 057
Ground Water (GW)

WELL 057 5010010-070SR (SR)

WELL 241 - HAMMET
Ground Water (GW)

WELL 241 - HAMMET 03S/08E-24K01SR (SR)

WELL 265 - LINCOLN ESTATES
Ground Water (GW)

WELL 265 - LINCOLN 03S/09E-24M01SR (SR)

WELL 260 - COFFEE VILLAGE 02
Ground Water (GW)

WELL 260 - COFFEE V 03S/09E-10P01SR (SR)

WELL 259 - COFFEE VILLAGE 01
Ground Water (GW)

WELL 259 - COFFEE V 03S/09E-10M01SR (SR)

WELL 264 - SHERWOOD FOREST
Ground Water (GW)

WELL 264 - SHERWOOD 03S/09E-09M01SR (SR)

WELL 262 - HART WELL 02
Ground Water (GW)

WELL 262 - HART WEL 03S/09E-16D01SR (SR)

WELL 305
Ground Water (GW)

WELL 305 5010016-011SR (SR)

WELL 287 - SCHOOL
Ground Water (GW)

WELL 287 - SCHOOL 04S/09E-04N02SR (SR)

WELL 284 - MUSICK
Ground Water (GW)

WELL 284 - MUSICK 04S/09E-03M01SR (SR)

WELL 223 - ALAMO
Ground Water (GW)

WELL 223 - ALAMO 04S/09E-04P01SR (SR)

WELL 217 - BYSTROM
Ground Water (GW)

WELL 217 - BYSTROM 03S/09E-33Q01SR (SR)

WELL 216 - PECOS
Ground Water (GW)

WELL 216 - PECOS 04S/09E-04K01SR (SR)

WELL 214 - RICHLAND
Ground Water (GW)

WELL 214 - RICHLAND 04S/09E-03K01SR (SR)

WELL 226 - HIGHWAY VILLAGE GAS
Ground Water (GW)

WELL 226 - HIGHWAY 03S/08E-13C01SR (SR)

WELL 304
Ground Water (GW)

WELL 304 5010003-016SR (SR)

WELL 301
Ground Water (GW)

WELL 301 5010003-015SR (SR)

WELL 283 - ANWAR MANOR (CALFORNIA)
Ground Water (GW)

WELL 283 - ANWAR MA 03S/09E-31G01SR (SR)

WELL 237 - ELM
Ground Water (GW)

WELL 237 - ELM 03S/08E-25J01SR (SR)

WELL 236 - EMERALD
Ground Water (GW)

WELL 236 - EMERALD 03S/09E-30Q01SR (SR)

WELL 232 - GRIMES
Ground Water (GW)

WELL 232 - GRIMES 04S/08E-01C02SR (SR)

WELL 229 - SUNSET MANOR
Ground Water (GW)

WELL 229 - SUNSET M 04S/09E-06H01SR (SR)

WELL 310 - FRAZINE
Ground Water (GW)

WELL 310 - FRAZINE 5010002-038SR (SR)

WELL 308
Ground Water (GW)

WELL 308 5010002-037SR (SR)

WELL 307
Ground Water (GW)

WELL 307 5010002-036SR (SR)

WELL 300
Ground Water (GW)

WELL 300 5010002-035SR (SR)

WELL 296
Ground Water (GW)

WELL 296 5010002-034SR (SR)

WELL 294 - VALLEY LIFT WEST
Ground Water (GW)

WELL 294 - VALLEY L 03S/10E-31K01SR (SR)

WELL 293 - VALLEY LIFT EAST - TREATED
Ground Water (GW)

WELL 293 - VALLEY L J50/002-93GACUK (UK)

WELL 293 - VALLEY LIFT
Ground Water (GW)

WELL 293 - VALLEY L 03S/10E-31J01SR (SR)

WELL 292 - MARIPOSA WEST
Ground Water (GW)

WELL 292 - MARIPOSA 03S/09E-36C01SR (SR)

WELL 291 - MARIPOSA EAST
Ground Water (GW)

WELL 291 - MARIPOSA 03S/09E-36C02SR (SR)

WELL 285 - NEW EMPIRE C ST
Ground Water (GW)

WELL 285 - NEW EMPI 03S/10E-30R02SR (SR)

WELL 279 - FARRAR (OLD 06)
Ground Water (GW)

WELL 279 - FARRAR ( 03S/09E-36D01SR (SR)

WELL 278 - SCENIC
Ground Water (GW)

WELL 278 - SCENIC 03S/09E-27D01SR (SR)

WELL 277 - NORTH CODONI
Ground Water (GW)

WELL 277 - NORTH CO 03S/10E-31F01SR (SR)

WELL 267 - ORANGEBURG
Ground Water (GW)

WELL 267 - ORANGEBU 03S/09E-21H01SR (SR)

WELL 247 - NORTH EMPIRE
Ground Water (GW)

WELL 247 - NORTH EM 03S/10E-30H01SR (SR)

WELL 225 - BUDGET PACK
Ground Water (GW)

WELL 225 - BUDGET P 03S/09E-34A01SR (SR)

WELL 204 - TRASK
Ground Water (GW)

WELL 204 - TRASK 03S/09E-26M01SR (SR)

WELL 212 - BEARD AVENUE
Ground Water (GW)

WELL 212 - BEARD AV 03S/09E-35A01SR (SR)

WELL 211 - THOUSAND OAKS
Ground Water (GW)

WELL 211 - THOUSAND 03S/09E-28J01SR (SR)

WELL 058
Ground Water (GW)

WELL 058 5010010-221SR (SR)

WELL 311
Ground Water (GW)

WELL 311 5010010-223SR (SR)

WELL 059
Ground Water (GW)

WELL 059 J50/010-059RASR (SR)

FAQ

Is City of Modesto tap water safe to drink?

When was City of Modesto last tested for water contamination?

The latest water samples were taken on September 12th, 2024.