Is Hughson, City of Tap Water Safe? Quality Report

Water source: Ground water
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.

health-based violations

violations on file

still open

Violation	Type	Status	Period
MCL	Health-based	Archived	2025-07-01 → 2025-09-30
MCL	Health-based	Archived	2025-04-01 → 2025-06-30
MCL	Health-based	Archived	2025-01-01 → 2025-03-31
TT	Health-based	Unaddressed	2024-10-17
MCL	Health-based	Archived	2024-10-01 → 2024-12-31
MCL	Health-based	Archived	2024-07-01 → 2024-09-30
MCL	Health-based	Archived	2024-04-01 → 2024-06-30
MCL	Health-based	Archived	2024-01-01 → 2024-03-31
MCL	Health-based	Archived	2023-10-01 → 2023-12-31
MCL	Health-based	Archived	2023-07-01 → 2023-09-30

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 95th percentile of this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.

Contaminant	Level vs EPA limit	Detection rate	Source	Period
Arsenic	13 µg/L 130% of the EPA limit, at the 95th percentile of samples — 10 µg/L worst single sample: 24 µg/L	592/597	SYR4	2012–2019
Nitrate	13243.6 µg/L 132% of the EPA limit, at the 95th percentile of samples — 10000 µg/L worst single sample: 15707 µg/L	370/374	SYR4	2012–2019
Lead	0.0 mg/L 0% of the EPA limit 0.0150 mg/L	28/28	LCR	2025
1,2-DIBROMO-3-CHLOROPROPANE	0.3760 µg/L 188% of the EPA limit, at the 95th percentile of samples — 0.2000 µg/L worst single sample: 0.4800 µg/L	23/27	SYR4	2012–2019
Barium	261.735 µg/L 13% of the EPA limit 2000 µg/L worst single sample: 266.3 µg/L	12/14	SYR4	2012–2018
Bromoform	2.552 µg/L No EPA limit set worst single sample: 2.78 µg/L	9/14	SYR4	2014–2019
TTHM	4.042 µg/L 5.1% of the EPA limit 80 µg/L worst single sample: 4.05 µg/L	9/14	SYR4	2014–2019
Chromium	2 µg/L 2% of the EPA limit 100 µg/L	7/14	SYR4	2012–2018
Fluoride	1262.5 µg/L 32% of the EPA limit 4000 µg/L worst single sample: 1550 µg/L	6/14	SYR4	2012–2018
Dibromoacetic Acid	1.8 µg/L No EPA limit set worst single sample: 1.9 µg/L	5/12	SYR4	2014–2019
Mercury	0.0480 µg/L 2.4% of the EPA limit 2 µg/L worst single sample: 0.0500 µg/L	3/14	SYR4	2012–2018
Nitrate-Nitrite	9080 µg/L 91% of the EPA limit 10000 µg/L worst single sample: 9360 µg/L	3/3	SYR4	2018
Dibromochloromethane	1.3435 µg/L No EPA limit set worst single sample: 1.35 µg/L	2/14	SYR4	2014–2019
Lead	0.2950 µg/L 2% of the EPA limit 15 µg/L worst single sample: 0.3000 µg/L	2/11	SYR4	2012–2015
Thallium, Total	0.7570 µg/L 38% of the EPA limit 2 µg/L worst single sample: 0.7600 µg/L	2/14	SYR4	2012–2018
Total Haloacetic Acids (HAA5)	4.655 µg/L 7.8% of the EPA limit 60 µg/L worst single sample: 4.8 µg/L	2/12	SYR4	2014–2019
Dichloroacetic Acid	2.1 µg/L No EPA limit set	1/12	SYR4	2014–2019
Selenium	1.33 µg/L 2.7% of the EPA limit 50 µg/L	1/14	SYR4	2012–2018
Trichloroacetic Acid	1.4 µg/L No EPA limit set	1/12	SYR4	2014–2019

88 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,3,7,8-TCDD2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromodichloromethaneChlorobenzeneCopperCadmiumCarbofuranCarbon TetrachlorideChlordaneChloroformDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: JAUREGUI, CARLA
Phone: 209-450-6252
Email: CJauregui@hughson.org

Frequently asked questions about Hughson, City of

Is Hughson, City of tap water safe to drink?

EPA monitoring detected 19 contaminants in Hughson, City of'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 Hughson, City of's water?

EPA monitoring detected Arsenic, Nitrate, Lead, 1,2-DIBROMO-3-CHLOROPROPANE, Barium, and others. The full list with the level and data source for each is above.

How many people does Hughson, City of serve?

Hughson, City of reports serving 7,481 people in California, per its EPA record.

Has Hughson, City of had any water quality violations?

The EPA has 85 violations on file for Hughson, City of, of which 78 are health-based (a contaminant limit or required treatment was breached) and 2 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.