A90/100
Hesperia Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 100,744 residents · California
What's In Hesperia's Tap Water?
73
Contaminants Tested
0
Exceed EPA Limits
1
Above EPA Goals
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
vanadium | 35.00 µg/L | — | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2010.
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Water Utility Details
HESPERIA WD
Population Served
100,744
Water Source
Groundwater
System ID
CA3610024
Frequently Asked Questions About Hesperia Water
Is Hesperia tap water safe to drink?
Hesperia, California tap water receives a grade of A (90/100), which is considered excellent. Out of 73 contaminants tested, none exceed EPA maximum contaminant levels (MCLs) and 1 exceed health guidelines (MCLGs). While the water meets federal standards, some residents may still choose to use a filter for additional peace of mind.
What contaminants are in Hesperia's water?
Of the 73 contaminants tested in Hesperia's water supply, the most notable include vanadium. No contaminants exceed EPA legal limits. 1 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.
Does Hesperia have any water quality violations?
Yes, Hesperia has 3 EPA violation(s) on record, with the most recent in 2010. Violation types include MR, MCL. 1 of these are health-based violations, which are the most serious category.
Do I need a water filter in Hesperia?
Hesperia water meets EPA standards, so a filter is not strictly necessary. However, some residents prefer the added security of a water filter. EPA health goals (MCLGs) are stricter than legal limits and are set at levels with zero expected health risk. 1 contaminant(s) exceed these stricter goals.
Where does Hesperia's tap water come from?
Hesperia's drinking water is sourced from groundwater and supplied by HESPERIA WD. The system serves approximately 100,744 people. Groundwater is pumped from underground aquifers, which often provides natural filtration.
How often is Hesperia's water tested?
Under the Safe Drinking Water Act (SDWA), water utilities are required to regularly test for over 90 contaminants. Testing frequency varies by contaminant — some are tested monthly, others quarterly or annually. Hesperia's water systems must report results to the EPA and publish an annual Consumer Confidence Report (CCR). The data on this page reflects the latest available EPA testing data.
How does Hesperia's water compare to other cities in California?
Hesperia's water quality score of 90/100 earns a grade of A, which is considered excellent. This places Hesperia among the better-performing water systems in California. Visit our California state page to see how all cities in the state compare.
What should I do if I'm concerned about Hesperia's water quality?
If you have concerns about Hesperia's tap water, consider these steps: (1) Request your utility's annual Consumer Confidence Report for detailed local data. (2) Get your water independently tested through a state-certified laboratory. (3) Consider an NSF-certified water filter rated for the contaminants found in your area. (4) Contact your water utility (HESPERIA WD) with specific questions. (5) Report water quality issues to your state drinking water program or the EPA Safe Drinking Water Hotline at 800-426-4791.