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.
10
health-based violations
12
violations on file
0
still open
| Violation | Type | Status | Period |
|---|---|---|---|
| TT | Health-based | Resolved | 2023-06-01 → 2023-06-30 |
| TT | Health-based | Resolved | 2023-06-01 → 2023-06-30 |
| MCL | Health-based | Resolved | 2000-05-01 → 2000-05-31 |
| MCL | Health-based | Resolved | 2000-05-01 → 2000-05-31 |
| TT | Health-based | Resolved | 1997-08-01 → 1997-08-31 |
| TT | Health-based | Resolved | 1997-08-01 → 1997-08-31 |
| TT | Health-based | Resolved | 1997-08-01 → 1997-08-31 |
| TT | Health-based | Resolved | 1997-08-01 → 1997-08-31 |
| TT | Health-based | Resolved | 1997-08-01 → 1997-08-31 |
| TT | Health-based | Resolved | 1997-08-01 → 1997-08-31 |
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 | 6102 µg/L 61% of the EPA limit 10000 µg/L
worst single sample: 8200 µg/L | 1882/1932 | SYR4 | 2012–2019 |
| TTHM | 76.7125 µg/L 96% of the EPA limit 80 µg/L
worst single sample: 101.61 µg/L | 440/451 | SYR4 | 2012–2019 |
| Bromodichloromethane | 16.962 µg/L No EPA limit set
worst single sample: 27.69 µg/L | 432/444 | SYR4 | 2012–2019 |
| Dibromochloromethane | 25.1265 µg/L No EPA limit set
worst single sample: 43.62 µg/L | 420/444 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 51.115 µg/L 85% of the EPA limit 60 µg/L
worst single sample: 75.8 µg/L | 418/443 | SYR4 | 2012–2019 |
| Chloroform | 58.527 µg/L No EPA limit set
worst single sample: 85.42 µg/L | 412/444 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 22.24 µg/L No EPA limit set
worst single sample: 36 µg/L | 354/443 | SYR4 | 2012–2019 |
| Bromoform | 21.152 µg/L No EPA limit set
worst single sample: 37.21 µg/L | 312/444 | SYR4 | 2012–2019 |
| Dibromoacetic Acid | 12.62 µg/L No EPA limit set
worst single sample: 30 µg/L | 293/443 | SYR4 | 2012–2019 |
| Trichloroacetic Acid | 32.06 µg/L No EPA limit set
worst single sample: 44.3 µg/L | 289/443 | SYR4 | 2012–2019 |
| Fluoride | 422 µg/L 11% of the EPA limit 4000 µg/L
worst single sample: 890 µg/L | 262/341 | SYR4 | 2012–2019 |
| Barium | 290 µg/L 14% of the EPA limit 2000 µg/L
worst single sample: 330 µg/L | 182/273 | SYR4 | 2012–2019 |
| Nitrate-Nitrite | 660000 µg/L 6600% of the EPA limit, at the 95th percentile of samples — 10000 µg/L
worst single sample: 1000000 µg/L | 141/162 | SYR4 | 2012–2019 |
| 1,1,1-Trichloroethane | 3.2 µg/L 1.6% of the EPA limit 200 µg/L
worst single sample: 4.2 µg/L | 81/640 | SYR4 | 2012–2019 |
| 1,1-Dichloroethylene | 5.46 µg/L 78% of the EPA limit 7 µg/L
worst single sample: 6.3 µg/L | 33/640 | SYR4 | 2012–2019 |
| Monobromoacetic Acid | 1.845 µg/L No EPA limit set
worst single sample: 2 µg/L | 32/443 | SYR4 | 2012–2019 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L | 28/28 | LCR | 2025 |
| Combined Uranium | 2.71553 µg/L 9.1% of the EPA limit 30 µg/L
worst single sample: 3.0396 µg/L | 16/50 | SYR4 | 2012–2019 |
| Selenium | 9 µg/L 18% of the EPA limit 50 µg/L
worst single sample: 11 µg/L | 11/270 | SYR4 | 2012–2019 |
| Combined Radium (-226 And -228) | 2.303 pCi/L 46% of the EPA limit 5 pCi/L
worst single sample: 2.6 pCi/L | 10/34 | SYR4 | 2012–2019 |
| Monochloroacetic Acid | 6.88 µg/L No EPA limit set
worst single sample: 6.94 µg/L | 6/443 | SYR4 | 2012–2019 |
| Arsenic | 5.5 µg/L 55% of the EPA limit 10 µg/L
worst single sample: 5.7 µg/L | 5/272 | SYR4 | 2012–2019 |
| Lithium | 10 µg/L No EPA limit set | 5/41 | UCMR-5 | 2025 |
| Chromium | 27.2 µg/L 27% of the EPA limit 100 µg/L
worst single sample: 29 µg/L | 4/360 | SYR4 | 2012–2019 |
| Asbestos | 0.2000 MFL 2.9% of the EPA limit 7 MFL | 3/76 | SYR4 | 2012–2019 |
| Gross Beta Particle Activity | 5.25 pCi/L No EPA limit set
worst single sample: 5.6 pCi/L | 3/11 | SYR4 | 2012–2019 |
| Lead | 16.04 µg/L 107% of the EPA limit, at the 95th percentile of samples — 15 µg/L
worst single sample: 17 µg/L | 3/270 | SYR4 | 2012–2019 |
| Copper | 342.085 µg/L 26% of the EPA limit 1300 µg/L
worst single sample: 360 µg/L | 2/273 | SYR4 | 2012–2019 |
| Di(2-ethylhexyl) Adipate | 0.2200 µg/L 0.1% of the EPA limit 400 µg/L | 1/148 | SYR4 | 2012–2019 |
| Di(2-ethylhexyl) Phthalate | 0.2900 µg/L 4.8% of the EPA limit 6 µg/L | 1/148 | SYR4 | 2012–2019 |
| Styrene | 0.6900 µg/L 0.7% of the EPA limit 100 µg/L | 1/640 | SYR4 | 2012–2019 |
80 contaminants tested, none detected
1,1,2-Trichloroethane1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,3,7,8-TCDD2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPfmbaPfmpaPFNAPFOAPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene
Utility contact
Frequently asked questions about San Jose Water
Is San Jose Water tap water safe to drink?
EPA monitoring detected 33 contaminants in San Jose Water'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 Jose Water's water?
EPA monitoring detected Nitrate, TTHM, Bromodichloromethane, Dibromochloromethane, Total Haloacetic Acids (HAA5), and others. The full list with the level and data source for each is above.
How many people does San Jose Water serve?
San Jose Water reports serving 1,039,920 people in California, per its EPA record.
Has San Jose Water had any water quality violations?
The EPA has 12 violations on file for San Jose Water, of which 10 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.