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Tap water quality report

American Canyon, City of

EPA monitoring tested this supplier for 110 contaminants and detected 21. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

110
contaminants tested
21
detected
21,437
people served
30
health-based violations
California rankingsLead in CaliforniaPFAS in California
Water source
Surface water
Ownership
Local government
Counties served
Napa

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.

30
health-based violations
33
violations on file
1
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2019-10-01 → 2019-12-31
MCL Health-based Resolved 2019-10-01 → 2019-12-31
MCL Health-based Resolved 2019-10-01 → 2019-12-31
MCL Health-based Resolved 2019-10-01 → 2019-12-31
MCL Health-based Resolved 2019-04-01 → 2019-06-30
MCL Health-based Resolved 2019-04-01 → 2019-06-30
MCL Health-based Resolved 2019-04-01 → 2019-06-30
MCL Health-based Resolved 2019-04-01 → 2019-06-30
MCL Health-based Resolved 2019-04-01 → 2019-06-30
MCL Health-based Resolved 2019-04-01 → 2019-06-30

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.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Bromodichloromethane
25.04 µg/L
No EPA limit set
worst single sample: 34 µg/L
139/139 SYR4 2012–2019
Chloroform
86.18 µg/L
No EPA limit set
worst single sample: 111 µg/L
139/139 SYR4 2012–2019
Dichloroacetic Acid
31.1 µg/L
No EPA limit set
worst single sample: 45 µg/L
139/139 SYR4 2012–2019
Trichloroacetic Acid
25.28 µg/L
No EPA limit set
worst single sample: 31.1 µg/L
139/139 SYR4 2012–2019
Dibromochloromethane
7.534 µg/L
No EPA limit set
worst single sample: 11.2 µg/L
135/139 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
59.965 µg/L 100%
of the EPA limit 60 µg/L
worst single sample: 115 µg/L
128/139 SYR4 2012–2019
TTHM
112.45 µg/L 141%
of the EPA limit, at the 95th percentile of samples — 80 µg/L
worst single sample: 143 µg/L
120/123 SYR4 2012–2019
Dibromoacetic Acid
4.685 µg/L
No EPA limit set
worst single sample: 10.1 µg/L
91/139 SYR4 2012–2019
Monochloroacetic Acid
16.49 µg/L
No EPA limit set
worst single sample: 96.8 µg/L
90/139 SYR4 2012–2019
Nitrate
1511.94 µg/L 15%
of the EPA limit 10000 µg/L
worst single sample: 1532.28 µg/L
60/108 SYR4 2012–2019
Monobromoacetic Acid
5.7875 µg/L
No EPA limit set
worst single sample: 7.41 µg/L
24/139 SYR4 2012–2019
Arsenic
4.527 µg/L 45%
of the EPA limit 10 µg/L
worst single sample: 4.68 µg/L
18/50 SYR4 2012–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 18/18 LCR 2024
Fluoride
234.75 µg/L 5.9%
of the EPA limit 4000 µg/L
worst single sample: 288 µg/L
16/25 SYR4 2012–2019
Lead
47.8 µg/L 319%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
worst single sample: 83 µg/L
11/30 SYR4 2012–2019
Chromium
89.005 µg/L 89%
of the EPA limit 100 µg/L
worst single sample: 103 µg/L
10/51 SYR4 2012–2019
Barium
53.2 µg/L 2.7%
of the EPA limit 2000 µg/L
worst single sample: 56 µg/L
8/45 SYR4 2012–2019
Cadmium
2.19 µg/L 44%
of the EPA limit 5 µg/L
worst single sample: 2.3 µg/L
3/49 SYR4 2012–2019
Nitrate-Nitrite
985650 µg/L 9857%
of the EPA limit, at the 95th percentile of samples — 10000 µg/L
worst single sample: 1000000 µg/L
2/19 SYR4 2012–2019
Bromoform
1.9 µg/L
No EPA limit set
 1/139 SYR4 2012–2019
Combined Uranium
2.831 µg/L 9.4%
of the EPA limit 30 µg/L
 1/12 SYR4 2012–2019
89 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCopperCyanideCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateGross Beta Particle ActivityHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
PATRICK, DOMINIC
Phone
707-258-1269
Email
dpatrick@cityofamericancanyon.org

Frequently asked questions about American Canyon, City of

Is American Canyon, City of tap water safe to drink?

EPA monitoring detected 21 contaminants in American Canyon, 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 American Canyon, City of's water?

EPA monitoring detected Bromodichloromethane, Chloroform, Dichloroacetic Acid, Trichloroacetic Acid, Dibromochloromethane, and others. The full list with the level and data source for each is above.

How many people does American Canyon, City of serve?

American Canyon, City of reports serving 21,437 people in California, per its EPA record.

Has American Canyon, City of had any water quality violations?

The EPA has 33 violations on file for American Canyon, City of, of which 30 are health-based (a contaminant limit or required treatment was breached) and 1 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.