Drinking water quality · 2026
· Verified
· PWSID CA3610024
What's in Hesperia Wd, CA tap water
Only 1 of 27 core regulated contaminants were reported for Hesperia Wd, CA. What was measured is not clean — but most of the picture is missing.
- !3 contaminants at or above a federal limit — worst is PFOS (Perfluorooctane sulfonic acid) at 2.8x
- !1 of 27 core regulated contaminants reported — 26 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
- −0 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
- −28 core regulated contaminants never reported (1/27)
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
- PFOS (Perfluorooctane sulfonic acid)2.8× the federal limit11.1 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 80% of U.S. systems
- PFOA (Perfluorooctanoic acid)2.6× the federal limit10.200000000000001 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 80% of CA systems that report it · higher than 85% of U.S. systems
- PFHxS (Perfluorohexane sulfonic acid)1.1× the federal limit10.5 ng/L · limit 10 ng/L
Regulated by the EPA at 10 parts per trillion and included in the PFAS Hazard Index.
Higher than 80% of CA systems that report it · higher than 85% of U.S. systems
+4 contaminants were measured and came in below the limitShow all
| Contaminant | Measured | Federal limit |
|---|---|---|
| PFHpA | 3.1 ng/L | — |
| 6:2 FTS | 0.0503 µg/L | — |
| PFHxA | 5.4 ng/L | — |
| PFPeA | 4.2 ng/L | — |
What this report doesn't tell you
26 of the 27 contaminants a community water system normally reports do not appear anywhere in Hesperia Wd, 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
PFAS — EPA UCMR5 (2023–2025)
3 PFAS compounds above EPA limits in Hesperia Wd, CA
The EPA finalized the first-ever federal drinking-water limits for six PFAS compounds in April 2024. These numbers come straight from EPA's UCMR5 lab dataset — every U.S. system serving more than 3,300 people tested every PFAS sample at an entry point to its distribution system. PFAS not listed below were either tested and not detected, or not yet sampled.
PFOS (Perfluorooctane sulfonic acid)
● Over EPA limit (2.8×)PFOA (Perfluorooctanoic acid)
● Over EPA limit (2.6×)PFHxS (Perfluorohexane sulfonic acid)
● Over EPA limit (1.1×)PFHpA
● Detected (no federal limit)6:2 FTS
● Detected (no federal limit)PFHxA
● Detected (no federal limit)PFPeA
● Detected (no federal limit)Where your water comes from · EPA SDWIS
Hesperia Wd, CA's drinking water comes from ground water, drawn from 16 sources.
Source
- WELL · 12
- WELL 03-A
- WELL 29
- WELL 15-A
- + 1 more
Treatment
- WELL 19A - CHLORINATED
- WELL 03-A - TREATED (CL2)
- WELL 05A - TREATED (CL2)
- + 13 more
Distribution
Also buys water from MOJAVE WATER AGENCY.
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.
- Maximum contaminant level exceededHealth-based1 violation on record · most recent Feb 2005resolved
Source: EPA SDWIS / ECHO. View the full federal record on EPA ECHO ↗