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Tap water quality report

City of Modesto - South Turlock

EPA monitoring tested this supplier for 55 contaminants and detected 12. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

55
contaminants tested
12
detected
1,099
people served
0
health-based violations
California rankingsLead in CaliforniaPFAS in California
Water source
SWP
Ownership
Local government
Counties served
Stanislaus

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

0
health-based violations
1
violations on file
0
still open
ViolationTypeStatusPeriod
MR Monitoring Resolved 1993-07-01 → 2003-12-31

Other contaminants detected

Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the single worst sample on record — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Nitrate
5200 µg/L 52%
of the EPA limit 10000 µg/L
 36/36 SYR4 2012–2019
Nitrate-Nitrite
5130 µg/L 51%
of the EPA limit 10000 µg/L
 14/14 SYR4 2012–2018
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 12/12 LCR 2023
Arsenic
9.3 µg/L 93%
of the EPA limit 10 µg/L
 5/5 SYR4 2013–2019
Barium
110 µg/L 5.5%
of the EPA limit 2000 µg/L
 2/5 SYR4 2013–2019
Bromoform
2.82 µg/L
No EPA limit set
 2/14 SYR4 2013–2019
Combined Uranium
16.39 µg/L 55%
of the EPA limit 30 µg/L
 2/4 SYR4 2013–2019
Dibromoacetic Acid
1.8 µg/L
No EPA limit set
 2/14 SYR4 2013–2019
Fluoride
130 µg/L 3.3%
of the EPA limit 4000 µg/L
 2/5 SYR4 2013–2019
TTHM
4.67 µg/L 5.8%
of the EPA limit 80 µg/L
 2/14 SYR4 2013–2019
Total Haloacetic Acids (HAA5)
1.8 µg/L 3%
of the EPA limit 60 µg/L
 2/14 SYR4 2013–2019
Dibromochloromethane
1.85 µg/L
No EPA limit set
 1/14 SYR4 2013–2019
43 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-DichloropropaneAntimony, TotalAtrazineBenzeneBeryllium, TotalBromodichloromethaneChlorobenzeneCopperCyanideCadmiumCarbon TetrachlorideChloroformChromiumDichloromethaneDichloroacetic AcidEthylene DibromideEthylbenzeneLassoLeadMercuryMonobromoacetic AcidMonochloroacetic AcidNitriteSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
MARTINEZ, MANUEL
Phone
209-342-4592
Email
mmartinez@modestogov.com

Frequently asked questions about City of Modesto - South Turlock

Is City of Modesto - South Turlock tap water safe to drink?

EPA monitoring detected 12 contaminants in City of Modesto - South Turlock's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in City of Modesto - South Turlock's water?

EPA monitoring detected Nitrate, Nitrate-Nitrite, Lead, Arsenic, Barium, and others. The full list with the level and data source for each is above.

How many people does City of Modesto - South Turlock serve?

City of Modesto - South Turlock reports serving 1,099 people in California, per its EPA record.

Has City of Modesto - South Turlock had any water quality violations?

The EPA has 1 violation on file for City of Modesto - South Turlock, of which 0 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.