Water Quality Report · Updated October 07, 2026
HESPERIA WD
HESPERIA WD delivers tap water graded C (71/100) by TapWaterSafety.org. The utility serves approximately 100,744 residents in HESPERIA, California using groundwater. The most significant water quality concerns are: PFAS contamination; Perfluorohexane sulfonate (PFHXS) significantly above health guideline; Haloacetic acids (HAA5) significantly above health guideline; Chromium (hexavalent) significantly above health guideline; Arsenic detected. For questions, the utility can be reached at 760-947-7742.
Is HESPERIA tap water safe to drink?
HESPERIA WD delivers tap water that earns a grade of C (71/100) from TapWaterSafety.org — an average rating, with several contaminants above health guidelines but generally compliant with US legal limits.
The utility serves 100,744 residents in HESPERIA, drawing from groundwater.
Public testing data identifies 12 contaminants in this water above EWG's health-based guidelines, including: Perfluorohexane sulfonate (PFHXS), Haloacetic acids (HAA5), Chromium (hexavalent), Arsenic, Nitrate and nitrite, Nitrate, Perfluorooctanoic acid (PFOA), Total trihalomethanes (TTHMs), Perfluorooctane sulfonate (PFOS), Haloacetic acids (HAA9), 6:2 Fluorotelomer Sulfonic Acid (6:2 FTSA), Bromoform. For most residents, a properly certified home filter at the kitchen tap is the most cost-effective way to reduce exposure to whatever's in your water. See our filter recommendations below, matched specifically to this utility's contaminant profile.
EPA compliance record
Official U.S. EPA records for HESPERIA WD (system ID CA3610024) for the last 3 years. Checked 2026-10-07.
Source: U.S. EPA Enforcement and Compliance History Online (ECHO), from the Safe Drinking Water Information System. See EPA's full report.
Quick actions for HESPERIA residents
Top concerns in this water
Based on the most recent EPA and EWG data, these are the most significant water quality issues for HESPERIA WD.
PFAS contamination
Severe concernPerfluorooctane sulfonate (PFOS), Perfluorooctanoic acid (PFOA) detected. PFAS are persistent chemicals linked to cancer and immune effects with no known safe exposure threshold.
Perfluorohexane sulfonate (PFHXS) significantly above health guideline
Moderate concernPerfluorohexane sulfonate (PFHXS) detected at 0.772 ppt, 772x above the EWG health guideline of 0.001 ppt.
Haloacetic acids (HAA5) significantly above health guideline
Moderate concernHaloacetic acids (HAA5) detected at 20.7 ppb, 207x above the EWG health guideline of 0.1 ppb.
Chromium (hexavalent) significantly above health guideline
Moderate concernChromium (hexavalent) detected at 3.75 ppb, 188x above the EWG health guideline of 0.02 ppb.
Arsenic detected
Moderate concernArsenic detected at 0.112 ppb.
Contact HESPERIA WD
Reach the utility directly for service issues, water quality concerns, or to request your Consumer Confidence Report.
General Contact
Treatment Plant
Recommended water filters for HESPERIA
Filters matched to the specific contaminants in this water supply.
Filter certified for PFOA/PFOS (NSF/ANSI 53 or 58)
$180-$750Reverse osmosis and some carbon block filters reduce PFAS. Look for certification to NSF/ANSI 53 or 58 for PFOA/PFOS.
Carbon filter certified for VOCs (NSF/ANSI 53)
$180-$599Activated carbon is effective for disinfection byproducts. Look for NSF/ANSI 53 VOC reduction.
Reverse osmosis certified for arsenic (NSF/ANSI 58)
$429-$599Reverse osmosis certified under NSF/ANSI 58 for arsenic is the most reliable home option.
Disclosure: TapWaterSafety earns a commission from purchases made through these links. This does not influence our scoring methodology or filter selection.
Score breakdown
This utility's overall score of 71/100 breaks down across five weighted components. Read the full methodology →
Contaminants detected — international standards comparison
Every contaminant detected, compared side-by-side against US EPA legal limits, the EU Drinking Water Directive (2020/2184), WHO Guidelines, and California's Public Health Goal (the strictest US benchmark). Why we show multiple standards →
| Contaminant | Detected | EWG US health-based |
EPA US legal |
EU DWD Europe |
WHO global |
CA PHG strictest US |
Tested sample year |
Status |
|---|---|---|---|---|---|---|---|---|
| Perfluorohexane sulfonate (PFHXS) PFAS |
0.772 ppt | 0.001 | 10.0 | — | — | — | — | 772× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
20.7 ppb | 0.1 | 60.0 | 60 | — | — | — | 207× over |
| Chromium (hexavalent) Heavy metal |
3.75 ppb | 0.02 | — | — | — | — | — | 188× over |
| Arsenic Heavy metal |
0.112 ppb | 0.004 | 10.0 | 10 | 10 | 0.004 | — | 28× over |
| Nitrate and nitrite Inorganic |
1.6 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 11× over |
| Nitrate Inorganic |
1.05 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 7.5× over |
| Perfluorooctanoic acid (PFOA) PFAS |
0.607 ppt | 0.09 | 4.0 | 100 | 100 | 0.007 | — | 6.7× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
0.514 ppb | 0.15 | 80.0 | 100 | — | — | — | 3.4× over |
| Perfluorooctane sulfonate (PFOS) PFAS |
0.869 ppt | 0.3 | 4.0 | 100 | 100 | 1 | — | 2.9× over |
| Haloacetic acids (HAA9) Disinfection byproduct |
0.124 ppb | 0.06 | — | — | — | — | — | 2.1× over |
| 6:2 Fluorotelomer Sulfonic Acid (6:2 FTSA) Other |
1.73 ppt | 1.0 | — | — | — | — | — | 1.7× over |
| Bromoform Disinfection byproduct |
0.55 ppb | 0.5 | — | — | — | — | — | 1.1× over |
| Vanadium Other |
17.8 ppb | 21.0 | — | — | — | — | — | Below guideline |
| 1,4-Dioxane Semi-volatile organic compound |
0.00377 ppb | 0.35 | — | — | 50 | 1 | — | Below guideline |
| Molybdenum Other |
0.246 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Chlorate Disinfection byproduct |
0.75 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Manganese Heavy metal |
0.129 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Perfluorohexanoic Acid (PFHxA) PFAS |
0.314 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.23 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Perfluoropentanoic Acid (PFPeA) PFAS |
0.145 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluoroheptanoic acid (PFHPA) PFAS |
0.107 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Chromium (total) Heavy metal |
0.0824 ppb | — | 100.0 | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.201 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
| Germanium Other |
0.0191 ppb | — | — | — | — | — | — | Below guideline |
| o-toluidine Other |
0.000875 ppb | — | — | — | — | — | — | Below guideline |
| Testosterone Other |
0.006 ppt | — | — | — | — | — | — | Below guideline |
All values in the unit of the detected level. Red cells indicate the detected level exceeds that standard. Some contaminants have limits in some jurisdictions but not others (shown as —). The "Tested" column shows the year each contaminant sample was collected.
Sources: US EPA, EU Drinking Water Directive 2020/2184, WHO Guidelines (4th ed.), California OEHHA PHGs, EWG Tap Water Database.
HESPERIA WD service area
This water system serves 1 community in San Bernardino County, California. Click any city for its dedicated tap water quality page.
Find the right filter for HESPERIA water
Browse filter categories by water-quality concern. Each option below is NSF-certified for the matched contaminant type.