Drinking water quality · 2021
· Verified
· PWSID CA1910199
What's in California Domestic Water Company — Whittier, Ca, CA tap water
3 contaminants in California Domestic Water Company — Whittier, Ca, CA's water sat at or above a federal limit, led by Trichloroethylene at 4.2x the limit.
- !3 contaminants at or above a federal limit — worst is Trichloroethylene at 4.2x
- !1 contaminant within 20% of a limit
- !13 of 27 core regulated contaminants reported — 14 never appear in this report
- ✓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.
- −60 contaminants at or above a federal limit
- −4 contaminants within 20% of a limit
- −0 open health-based violations
- −0 open monitoring / reporting violations
- −0 health-based violations resolved in the last 5 years
- −9 core regulated contaminants never reported (13/27)
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
- Trichloroethylene4.2× the federal limit20.9 ug/L · limit 5 ug/L
A known human carcinogen; long-term exposure above the federal limit can damage the liver.
- Tetrachloroethylene3.5× the federal limit17.7 ug/L · limit 5 ug/L
A likely human carcinogen; long-term exposure above the federal limit can damage the liver and kidneys.
- PFOS2.3× the federal limit9.1 ng/L · limit 4 ng/L
Linked to cancer, thyroid disease, and immune effects; the EPA set an enforceable limit of 4 parts per trillion.
Higher than 75% of CA systems that report it · higher than 75% of U.S. systems
- PFOA98% of the federal limit3.9 ng/L · limit 4 ng/L
Linked to cancer, liver damage, and immune effects; the EPA set an enforceable limit of 4 parts per trillion.
Higher than 50% of CA systems that report it · higher than 35% of U.S. systems
+19 contaminants were measured and came in below the limitShow all
| Contaminant | Measured | Federal limit |
|---|---|---|
| Nitrate | 5.6 mg/L | 10 mg/L |
| Dichloroethylene 11 | 2.76 ug/L | 7 ug/L |
| Chlorine | 1.35 mg/L | 4 mg/L |
| Perfluorohexanesulfonic acid | 2.4 ng/L | 10 ng/L |
| Arsenic | 2.1 ug/L | 10 ug/L |
| Fluoride | 0.37 mg/L | 4 mg/L |
| Carbon Tetrachloride | 444 ng/L | 5000 ng/L |
| Gross Alpha | 1.1 pCi/L | 15 pCi/L |
| Barium | 0.129 mg/L | 2 mg/L |
| Chromium | 3.9 ug/L | 100 ug/L |
| Cis Dichloroethylene 12 | 2.04 ug/L | 70 ug/L |
| TTHM | 0.57 ug/L | 80 ug/L |
| Chloroform | 0.57 ug/L | — |
| NDMA | 5.1 ng/L | 10 ng/L |
| Perchlorate | 5.3 ug/L | — |
| Chromium, Hexavalent | 3.9 ug/L | 0.02 ug/L |
| Perfluorobutanesulfonic acid | 0.9 ng/L | — |
| Combined Radium | Not detected pCi/L | 5 pCi/L |
| Uranium | 2.7 pCi/L | 20 pCi/L |
What this report doesn't tell you
14 of the 27 contaminants a community water system normally reports do not appear anywhere in California Domestic Water Company — Whittier, 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.