Drinking water quality · 2021
· Verified
· PWSID CA4310011
What's in San Jose Water — San Jose, Ca, CA tap water
Every one of the 15 core regulated contaminants reported for San Jose Water — San Jose, Ca, CA came in below its federal limit.
- !1 contaminant within 20% of a limit
- !15 of 27 core regulated contaminants reported — 12 never appear in this report
- ✓Nothing over a federal limit
- ✓No open federal violations
+How this score is calculated
Every system starts at 100. Points come off for measured levels, for the federal violation record, and for how much of the core regulated set the utility actually reported. All three inputs are the utility's own published numbers and EPA's own records.
- −0 contaminants at or above a federal limit
- −4 contaminants within 20% of a limit
- −0 open health-based violations
- −0 open monitoring / reporting violations
- −2 health-based violations resolved in the last 5 years
- −6 core regulated contaminants never reported (15/27)
A 90–100 · B 80–89 · C 70–79 · D 60–69 · F below 60. A system reporting under a third of the core set is capped at C however clean its numbers look — a short report is not a clean bill of health.
Full grading methodology, constant for constant →What to worry about
- HAA587% of the federal limit52 ug/L · limit 60 ug/L
Long-term exposure above the federal limit is associated with an increased cancer risk.
Higher than 95% of CA systems that report it · higher than 95% of U.S. systems
+27 contaminants were measured and came in below the limitShow all
| Contaminant | Measured | Federal limit |
|---|---|---|
| TTHM | 60 ug/L | 80 ug/L |
| PFOS | 1.8 ng/L | 4 ng/L |
| Perfluorohexanesulfonic acid | 3.3 ng/L | 10 ng/L |
| Turbidity | 0.32 NTU | 1 NTU |
| Nitrate | 3 mg/L | 10 mg/L |
| Chlorine Total | 1.15 mg/L | 4 mg/L |
| Bromate | 2.5 ug/L | 10 ug/L |
| Gross Alpha | 3.3 pCi/L | 15 pCi/L |
| Copper | 0.23 mg/L | 1.3 mg/L |
| Barium | 0.11 mg/L | 2 mg/L |
| Chromium | 2.9 ug/L | 100 ug/L |
| Chlorate | 163 ug/L | 800 ug/L |
| Fluoride | Not detected mg/L | 4 mg/L |
| Aluminum | Not detected mg/L | — |
| Arsenic | Not detected ug/L | 10 ug/L |
| Boron | 162 ug/L | 1000 ug/L |
| Lead | Not detected ug/L | 15 ug/L |
| Selenium | Not detected ug/L | 50 ug/L |
| Vanadium | 2.6 ug/L | 50 ug/L |
| Cryptosporidium | Not detected | — |
| Giardia lamblia | 0.22 | — |
| Total Coliform | 0.27 % | 0 % |
| Dichloroethylene 11 | Not detected ug/L | 7 ug/L |
| Trichloroethane 111 | Not detected ug/L | 200 ug/L |
| PFOA | Not detected ng/L | 4 ng/L |
| Combined Radium | Not detected pCi/L | 5 pCi/L |
| Uranium | 1.3 pCi/L | 20 pCi/L |
What this report doesn't tell you
12 of the 27 contaminants a community water system normally reports do not appear anywhere in San Jose Water — San Jose, Ca, CA's data. Absent is not the same as absent-from-the-water — it means nobody published a number.
+Full detail: PFAS testing, water source, historical monitoring, and the federal violation record
Compliance history
Federal Safe Drinking Water Act violation & enforcement records (EPA SDWIS). A violation is a regulatory determination by the state or EPA — separate from the measured levels above.
- Treatment technique violationHealth-based2 violations on record · most recent May 2023resolved
- Maximum contaminant level exceededHealth-based1 violation on record · most recent Apr 2000resolved
Source: EPA SDWIS / ECHO. View the full federal record on EPA ECHO ↗