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Tap water quality report

City of Clovis

EPA monitoring tested this supplier for 95 contaminants and detected 32. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

95
contaminants tested
32
detected
130,130
people served
8
health-based violations
California rankingsLead in CaliforniaPFAS in California
Water source
Surface water
Ownership
Local government
Counties served
Fresno

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.

8
health-based violations
10
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 1993-03-01 → 1993-03-31
MCL Health-based Resolved 1993-03-01 → 1993-03-31
MCL Health-based Resolved 1992-12-01 → 1992-12-31
MCL Health-based Resolved 1992-12-01 → 1992-12-31
MCL Health-based Resolved 1992-10-01 → 1992-10-31
MCL Health-based Resolved 1992-10-01 → 1992-10-31
MCL Health-based Resolved 1989-07-01 → 1991-07-31
MCL Health-based Resolved 1989-07-01 → 1991-07-31
MR Monitoring Resolved 2013-08-01 → 2013-08-31
MR Monitoring Resolved 2013-08-01 → 2013-08-31

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).
ContaminantMaxDetection ratePeriod
PFBS 0.0079 µg/L 10/78 2024
PFOA 0.0180 µg/L 9/78 2024
PFOS 0.0410 µg/L 8/78 2024
Pfhxa 0.0080 µg/L 6/78 2024
PFHXS 0.0088 µg/L 4/78 2024
Pfpea 0.0084 µg/L 3/78 2024
Pfda 0.0031 µg/L 2/78 2024
Pfhpa 0.0057 µg/L 2/78 2024
PFNA 0.0069 µg/L 2/78 2024
Pfba 0.0061 µg/L 1/78 2024

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.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Nitrate
8600 µg/L 86%
of the EPA limit 10000 µg/L
worst single sample: 13000 µg/L
2534/2610 SYR4 2012–2019
1,2-DIBROMO-3-CHLOROPROPANE
0.3200 µg/L 160%
of the EPA limit, at the 95th percentile of samples — 0.2000 µg/L
worst single sample: 0.5700 µg/L
960/1347 SYR4 2012–2019
TTHM
58 µg/L 73%
of the EPA limit 80 µg/L
worst single sample: 79 µg/L
230/237 SYR4 2012–2019
Chloroform
56 µg/L
No EPA limit set
worst single sample: 75 µg/L
216/237 SYR4 2012–2019
Dichloroacetic Acid
18 µg/L
No EPA limit set
worst single sample: 30 µg/L
212/232 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
31.1 µg/L 52%
of the EPA limit 60 µg/L
worst single sample: 45 µg/L
210/232 SYR4 2012–2019
Fluoride
187 µg/L 4.7%
of the EPA limit 4000 µg/L
worst single sample: 240 µg/L
207/238 SYR4 2012–2019
Trichloroacetic Acid
10 µg/L
No EPA limit set
worst single sample: 16 µg/L
207/232 SYR4 2012–2019
Bromodichloromethane
6.47 µg/L
No EPA limit set
worst single sample: 12 µg/L
187/237 SYR4 2012–2019
Nitrate-Nitrite
6675 µg/L 67%
of the EPA limit 10000 µg/L
worst single sample: 9800 µg/L
136/153 SYR4 2016–2019
Arsenic
3.55 µg/L 36%
of the EPA limit 10 µg/L
worst single sample: 3.9 µg/L
51/238 SYR4 2012–2019
Barium
168.5 µg/L 8.4%
of the EPA limit 2000 µg/L
worst single sample: 170 µg/L
44/238 SYR4 2012–2019
Dibromochloromethane
3.65 µg/L
No EPA limit set
worst single sample: 5.4 µg/L
39/237 SYR4 2012–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 24/24 LCR 2024
Dibromoacetic Acid
1.86 µg/L
No EPA limit set
worst single sample: 2.1 µg/L
9/232 SYR4 2012–2019
Monochloroacetic Acid
6.285 µg/L
No EPA limit set
worst single sample: 6.6 µg/L
8/232 SYR4 2012–2019
Bromoform
1.39 µg/L
No EPA limit set
worst single sample: 1.4 µg/L
3/237 SYR4 2012–2019
Copper
74 µg/L 5.7%
of the EPA limit 1300 µg/L
 1/238 SYR4 2012–2019
Ethylene Dibromide
0.0200 µg/L 40%
of the EPA limit 0.0500 µg/L
 1/1347 SYR4 2012–2019
Lead
5.9 µg/L 39%
of the EPA limit 15 µg/L
 1/238 SYR4 2012–2019
Monobromoacetic Acid
1 µg/L
No EPA limit set
 1/232 SYR4 2012–2019
Selenium
24 µg/L 48%
of the EPA limit 50 µg/L
 1/238 SYR4 2012–2019
63 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAsbestosAtrazineBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbon TetrachlorideChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEndothallEthylbenzeneHfpo-DaLassoMercuryNetfosaaNfdhaNmefosaaNitritePfdoaPfeesaPfhpsPfmbaPfmpaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
TORSTENSEN, NICHOLAS
Phone
559-324-2662
Email
[email protected]

Frequently asked questions about City of Clovis

Is City of Clovis tap water safe to drink?

EPA monitoring detected 32 contaminants in City of Clovis'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 Clovis's water?

EPA monitoring detected Nitrate, 1,2-DIBROMO-3-CHLOROPROPANE, TTHM, Chloroform, Dichloroacetic Acid, and others. The full list with the level and data source for each is above.

How many people does City of Clovis serve?

City of Clovis reports serving 130,130 people in California, per its EPA record.

Has City of Clovis had any water quality violations?

The EPA has 10 violations on file for City of Clovis, of which 8 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.