Compliance record
PFAS detected
PFAS are industrial “forever chemicals”. These are the EPA's latest
nationwide test results (2023–2025).
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 |
|---|---|---|---|---|
| Nitrate | 2712 µg/L 27% of the EPA limit 10000 µg/L
worst single sample: 3900 µg/L | 386/418 | SYR4 | 2012–2019 |
| 1,1-Dichloroethylene | 3.793 µg/L 54% of the EPA limit 7 µg/L
worst single sample: 6.3 µg/L | 203/426 | SYR4 | 2012–2019 |
| Trichloroethylene | 21.0645 µg/L 421% of the EPA limit, at the 95th percentile of samples — 5 µg/L
worst single sample: 34 µg/L | 192/426 | SYR4 | 2012–2019 |
| Tetrachloroethylene | 31.679 µg/L 634% of the EPA limit, at the 95th percentile of samples — 5 µg/L
worst single sample: 40.81 µg/L | 164/426 | SYR4 | 2012–2019 |
| TTHM | 27.999 µg/L 35% of the EPA limit 80 µg/L
worst single sample: 44.2 µg/L | 128/354 | SYR4 | 2012–2019 |
| Fluoride | 727.3 µg/L 18% of the EPA limit 4000 µg/L
worst single sample: 818 µg/L | 115/115 | SYR4 | 2012–2019 |
| Chloroform | 8.454 µg/L No EPA limit set
worst single sample: 16.49 µg/L | 103/354 | SYR4 | 2012–2019 |
| Bromoform | 3.5695 µg/L No EPA limit set
worst single sample: 7.6 µg/L | 62/355 | SYR4 | 2012–2019 |
| Dibromochloromethane | 10.918 µg/L No EPA limit set
worst single sample: 12.02 µg/L | 62/355 | SYR4 | 2012–2019 |
| Bromodichloromethane | 10.6985 µg/L No EPA limit set
worst single sample: 12.68 µg/L | 60/355 | SYR4 | 2012–2019 |
| Dibromoacetic Acid | 3.93 µg/L No EPA limit set
worst single sample: 4.2 µg/L | 58/62 | SYR4 | 2012–2019 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L | 26/26 | LCR | 2023 |
| Total Haloacetic Acids (HAA5) | 22 µg/L 37% of the EPA limit 60 µg/L
worst single sample: 23 µg/L | 24/62 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 13 µg/L No EPA limit set
worst single sample: 16 µg/L | 16/62 | SYR4 | 2012–2019 |
| Trichloroacetic Acid | 5.62 µg/L No EPA limit set
worst single sample: 5.8 µg/L | 10/62 | SYR4 | 2012–2019 |
| Lithium | 65.7 µg/L No EPA limit set | 4/8 | UCMR-5 | 2024 |
| Arsenic | 4.2 µg/L 42% of the EPA limit 10 µg/L
worst single sample: 4.3 µg/L | 3/7 | SYR4 | 2012–2018 |
| Combined Uranium | 1.85252 µg/L 6.2% of the EPA limit 30 µg/L
worst single sample: 1.937 µg/L | 3/6 | SYR4 | 2013–2019 |
| 1,1,2-Trichloroethane | 0.5100 µg/L 10% of the EPA limit 5 µg/L | 1/426 | SYR4 | 2012–2019 |
| Dichloromethane | 0.6900 µg/L 14% of the EPA limit 5 µg/L | 1/426 | SYR4 | 2012–2019 |
| Nitrate-Nitrite | 1600 µg/L 16% of the EPA limit 10000 µg/L | 1/2 | SYR4 | 2018 |
65 contaminants tested, none detected
1,1,1-Trichloroethane1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAtrazineBhc-GammaBariumBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCopperCyanideCadmiumCarbon TetrachlorideChromiumDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateEthylene DibromideEthylbenzeneHexachlorobenzeneHfpo-DaHexachlorocyclopentadieneLassoLeadMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitritePfdaPfdoaPfeesaPfhpsPFHXSPfmbaPfmpaPFNAPFOSPfpesPftaPftrdaPfunaSeleniumSimazineStyreneThallium, TotalTolueneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene
Utility contact
Frequently asked questions about Commerce-City, Water Dept.
Is Commerce-City, Water Dept. tap water safe to drink?
EPA monitoring detected 27 contaminants in Commerce-City, Water Dept.'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 Commerce-City, Water Dept.'s water?
EPA monitoring detected Nitrate, 1,1-Dichloroethylene, Trichloroethylene, Tetrachloroethylene, TTHM, and others. The full list with the level and data source for each is above.
How many people does Commerce-City, Water Dept. serve?
Commerce-City, Water Dept. reports serving 4,205 people in California, per its EPA record.
Has Commerce-City, Water Dept. had any water quality violations?
The EPA has no formal drinking-water violations on file for Commerce-City, Water Dept..
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.