Drinking water quality · 2024
· Verified
What's in Hesperia, CA tap water
37 contaminants were measured in the Hesperia, CA water system's 2024 annual report. Each is shown below against its federal limit — 3 sit at or above that limit.
- Reporting year
- 2024
- Contaminants measured
- 37
- Over federal limit
- 3
- Approaching the limit
- 0
- Worst contaminant
- PFOS
- Service area
- CA
PFAS — EPA UCMR5 (2023–2025)
3 PFAS compounds above EPA limits in Hesperia, 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, 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 ↗
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Gross AlphaGross alpha particle activity — a combined measure of alpha-emitting radioactive substances. | 0–4.88 pCi/LRangeSystem-wide | 15 pCi/LMCL | Within the limit |
| UraniumA naturally occurring radioactive metal from erosion of natural deposits. | Not detected pCi/LAverageSystem-wide | 20 pCi/LMCL | Detected — no federal limit |
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ArsenicA naturally occurring element that also enters water from industry and agriculture. | 0–2.4 ug/LRangeSystem-wide | None set | Within the limit |
| Chromium, TotalTotal chromium — the sum of all chromium forms, from natural deposits and industrial discharge. | 0–1.4 ug/LRangeSystem-wide | None set | Within the limit |
| CopperA metal that enters water from corroding household plumbing. | Not detected mg/L90th percentileAt the tap | 1.3 mg/LAction level | None detected |
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | Not detected ug/L90th percentileAt the tap | None set | None detected |
| CalciumA naturally occurring mineral that contributes to water hardness. | 30 mg/LAverageSystem-wide | None set | Detected — no federal limit |
| Chromium, HexavalentHexavalent chromium ('chromium-6') — the more toxic form of chromium. | 0–10 ug/LRangeSystem-wide | None set | Detected — no federal limit |
| MagnesiumA naturally occurring mineral that contributes to water hardness. | 4.5 mg/LAverageSystem-wide | None set | Detected — no federal limit |
| PotassiumA naturally occurring mineral from rock and soil. | 1.5 mg/LAverageSystem-wide | None set | Detected — no federal limit |
| SodiumA naturally occurring salt component. | 16 mg/LAverageSystem-wide | None set | Detected — no federal limit |
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TurbidityA measure of cloudiness from suspended particles in the water. | 0.17 NTUAverageSystem-wide | 1 NTUMCL | Within the limit |
| AlkalinityA measure of the water's capacity to neutralize acids. | 67 mg/LAverageSystem-wide | None set | Detected — no federal limit |
| Bicarbonate | 82 mg/LAverageSystem-wide | None set | Detected — no federal limit |
| HardnessA measure of dissolved calcium and magnesium minerals. | 94 mg/LAverageSystem-wide | None set | Detected — no federal limit |
| OdorA measure of detectable smell in the water. | 1AverageSystem-wide | None set | Detected — no federal limit |
| pHA measure of how acidic or basic the water is. | 7.3AverageSystem-wide | None set | Detected — no federal limit |
| Specific ConductanceA measure of how well water conducts electricity, which tracks dissolved mineral content. | 262AverageSystem-wide | None set | Detected — no federal limit |
| Total Dissolved SolidsTotal dissolved solids — the combined content of all dissolved minerals and salts. | 170 mg/LAverageSystem-wide | None set | Detected — no federal limit |
Disinfectants
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ChlorineA disinfectant added to drinking water to kill bacteria and viruses. | 0.45 mg/LAverageSystem-wide | 4 mg/LMCL | Within the limit |
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.28 mg/LAverageSystem-wide | 4 mg/LMCL | Within the limit |
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | 0.53 mg/LAverageSystem-wide | 10 mg/LMCL | Within the limit |
| ChlorideA naturally occurring salt compound. | 24 mg/LAverageSystem-wide | None set | Detected — no federal limit |
| SulfateA naturally occurring mineral from rock and soil. | 15 mg/LAverageSystem-wide | None set | Detected — no federal limit |
Other
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Nitrate Nitrite | 0.53 mg/LAverageSystem-wide | 10 mg/LMCL | Within the limit |
| Chromium | 0.37 ug/LAverageSystem-wide | None set | Within the limit |
| Radium 226 228 | Not detected pCi/LAverageSystem-wide | 5 pCi/LMCL | Within the limit |
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter. | 3.2 ug/LAverageSystem-wide | None set | Within the limit |
Microbial
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Escherichia coli (E. coli)Escherichia coli — bacteria found in the gut of humans and animals. | 0Reported levelSystem-wide | None set | None detected |
| Total ColiformA group of bacteria used as an indicator of overall water-system sanitation. | 0Reported levelSystem-wide | 0Public health goal | None detected |
PFAS ("forever chemicals")
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| PFBAPerfluorobutanoic acid, a shorter-chain PFAS 'forever chemical.' | 0–1.2 ng/LRangeSystem-wide | None set | Detected — no federal limit |
People also ask about Hesperia, CA's water
+Is Hesperia, CA tap water safe to drink in 2024?
The 2024 Consumer Confidence Report for the Hesperia, CA water utility lists 3 contaminants at or above the federal limit: PFOS, PFOA, and Perfluorohexanesulfonic acid. Whether that means the water is "unsafe" depends on which contaminant, how long the exposure, and individual health factors. The table on this page shows the measured value, the federal threshold, and the regulated statistic used for compliance.
+What contaminants are in Hesperia, CA tap water?
37 contaminants were measured in Hesperia, CA's 2024 Consumer Confidence Report, spanning metals, physical & aggregate, and pfas ("forever chemicals"). 10 have an enforceable federal limit; the rest are detected but unregulated. Every measured value, in the utility's own units, is on this page.
+Which contaminants exceed federal limits in Hesperia, CA tap water?
3 contaminants in Hesperia, CA's 2024 report sit at or above the federal limit: PFOS (12.6× the limit); PFOA (2.5× the limit); Perfluorohexanesulfonic acid (1.1× the limit). The EPA enforces these limits against the regulated reporting statistic — typically a running annual average or 90th percentile — not a one-off sample spike.
+What is the worst contaminant in Hesperia, CA tap water?
The contaminant with the highest measured value relative to its federal limit in the 2024 report is PFOS, at 12.6× the federal threshold. It belongs to the pfas ("forever chemicals") family of contaminants.
+Where does the data on this page come from?
Every value is transcribed from Hesperia, CA's 2024 Consumer Confidence Report — the annual drinking-water report every U.S. public water utility is required by federal law to publish. The original source document is archived and viewable on this site. A water-quality report covers an entire service area, not a single address.
+How often is Hesperia, CA's water quality data updated?
Each U.S. public water utility publishes one Consumer Confidence Report per year, covering the prior calendar year's measurements. This page reflects the 2024 report; a new report will replace it once the utility publishes its next annual update.