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 | 7900 µg/L 79% of the EPA limit 10000 µg/L
worst single sample: 18000 µg/L | 14814/14902 | SYR4 | 2012–2019 |
| Tetrachloroethylene | 4.1 µg/L 82% of the EPA limit 5 µg/L
worst single sample: 9.2 µg/L | 1907/4482 | SYR4 | 2012–2019 |
| Trichloroethylene | 1.3 µg/L 26% of the EPA limit 5 µg/L
worst single sample: 1.7 µg/L | 429/4482 | SYR4 | 2012–2019 |
| Arsenic | 8.615 µg/L 86% of the EPA limit 10 µg/L
worst single sample: 15 µg/L | 218/512 | SYR4 | 2012–2019 |
| TTHM | 9 µg/L 11% of the EPA limit 80 µg/L
worst single sample: 13 µg/L | 141/275 | SYR4 | 2012–2019 |
| cis-1,2-Dichloroethylene | 0.9435 µg/L 1.3% of the EPA limit 70 µg/L
worst single sample: 1.1 µg/L | 134/2401 | SYR4 | 2012–2019 |
| Dibromochloromethane | 3.165 µg/L No EPA limit set
worst single sample: 4.2 µg/L | 128/933 | SYR4 | 2012–2019 |
| Bromoform | 3.455 µg/L No EPA limit set
worst single sample: 5.3 µg/L | 124/933 | SYR4 | 2012–2019 |
| Fluoride | 1275 µg/L 32% of the EPA limit 4000 µg/L
worst single sample: 1700 µg/L | 106/106 | SYR4 | 2012–2019 |
| Nitrate-Nitrite | 6780 µg/L 68% of the EPA limit 10000 µg/L
worst single sample: 920000 µg/L | 102/113 | SYR4 | 2014–2018 |
| Bromodichloromethane | 2.54 µg/L No EPA limit set
worst single sample: 4.4 µg/L | 87/933 | SYR4 | 2012–2019 |
| Chloroform | 1.73 µg/L No EPA limit set
worst single sample: 2.9 µg/L | 55/933 | SYR4 | 2012–2019 |
| Chromium | 3.5 µg/L 3.5% of the EPA limit 100 µg/L
worst single sample: 3.9 µg/L | 49/152 | SYR4 | 2012–2019 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L | 24/24 | LCR | 2024 |
| Combined Uranium | 27.3266 µg/L 91% of the EPA limit 30 µg/L
worst single sample: 28.757 µg/L | 17/17 | SYR4 | 2012–2019 |
| 1,1-Dichloroethylene | 0.7900 µg/L 11% of the EPA limit 7 µg/L
worst single sample: 0.8800 µg/L | 16/2401 | SYR4 | 2012–2019 |
| Dibromoacetic Acid | 1.8 µg/L No EPA limit set | 11/108 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 8.47 µg/L 14% of the EPA limit 60 µg/L
worst single sample: 10 µg/L | 10/108 | SYR4 | 2012–2019 |
| Monochloroacetic Acid | 8.81 µg/L No EPA limit set
worst single sample: 10 µg/L | 8/108 | SYR4 | 2012–2019 |
| Monobromoacetic Acid | 1.555 µg/L No EPA limit set
worst single sample: 1.6 µg/L | 4/108 | SYR4 | 2012–2019 |
| 1,2-Dichloropropane | 0.6170 µg/L 12% of the EPA limit 5 µg/L
worst single sample: 0.6200 µg/L | 3/2401 | SYR4 | 2012–2019 |
| Copper | 406 µg/L 31% of the EPA limit 1300 µg/L
worst single sample: 430 µg/L | 3/115 | SYR4 | 2012–2019 |
| Carbon Tetrachloride | 0.2195 µg/L 4.4% of the EPA limit 5 µg/L
worst single sample: 0.2200 µg/L | 2/2401 | SYR4 | 2012–2019 |
| Dichloromethane | 0.6465 µg/L 13% of the EPA limit 5 µg/L
worst single sample: 0.6500 µg/L | 2/2401 | SYR4 | 2012–2019 |
| Benzene | 0.1500 µg/L 3% of the EPA limit 5 µg/L | 1/2401 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 1.1 µg/L No EPA limit set | 1/108 | SYR4 | 2012–2019 |
| Lead | 40 µg/L 267% of the EPA limit, at the 95th percentile of samples — 15 µg/L | 1/106 | SYR4 | 2012–2019 |
| Lithium | 9.11 µg/L No EPA limit set | 1/44 | UCMR-5 | 2024 |
50 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane11Cl-PF3OUdS4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalBariumBeryllium, TotalChlorobenzeneCyanideCadmiumEthylene DibromideEthylbenzeneHfpo-DaMercuryNetfosaaNfdhaNmefosaaNitritePfbaPfdaPfdoaPfeesaPfhpaPfhpsPfmbaPfmpaPFNAPFOAPFOSPfpesPftaPftrdaPfunaSeleniumStyreneThallium, TotalTolueneTrichloroacetic AcidVinyl ChlorideXylenes, TotalO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene
Utility contact
Frequently asked questions about San Bernardino City
Is San Bernardino City tap water safe to drink?
EPA monitoring detected 32 contaminants in San Bernardino City'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 San Bernardino City's water?
EPA monitoring detected Nitrate, Tetrachloroethylene, Trichloroethylene, Arsenic, TTHM, and others. The full list with the level and data source for each is above.
How many people does San Bernardino City serve?
San Bernardino City reports serving 214,665 people in California, per its EPA record.
Has San Bernardino City had any water quality violations?
The EPA has no formal drinking-water violations on file for San Bernardino City.
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.