Oroville
Is Oroville tap water safe to drink?
Mostly yes — Oroville scores 99/100. This report aggregates EPA drinking water data across 4 local systems in Oroville. We found 19 total violations (1 unresolved).
Real-Time Environment
Live: 02:30 PM☀️ No active precipitation. Rainfall can impact surface water turbidity and pollutant runoff in Oroville.
Water Quality Impact
🛡️ Home Water Treatment Needs
Should you invest in filtration or softening for your home in Oroville?
Expert Advice
Your water quality is excellent. Standard filtration is optional but can further enhance taste.
Buying a Filter?
Filter requirements and certified reduction benchmarks for Oroville tap water.
Baby Formula Safety
Infant formula preparation risks, nitrate levels, and lead pipe guidance in Oroville.
Homebuyer's Perspective
Evaluating water infrastructure in Oroville protects plumbing and helps estimate water heater longevity. The high safety score (99/100) suggests lower risk for plumbing corrosion and appliance scaling.
Health & Family Safety
Residents should monitor Lead (90th percentile) levels. Pregnant women and families with young children should consult the specific EPA health goals listed below.
View Health Risk Glossary →Compliance Record for Oroville
Based on EPA SDWIS violation records and contaminant test results for all water systems serving Oroville.
Frequently Asked Questions
Is Oroville tap water safe to drink?
Mostly yes — Oroville scores 99/100.
How many water systems serve Oroville?
Oroville is served by 4 public water systems in our latest EPA-backed dataset.
How can I check water quality for my exact address in Oroville?
Use the WaterQ search tool to look up your ZIP code and view nearby systems, contaminant levels, and recent violations for Oroville.
What is the water quality score for Oroville?
The water quality score for Oroville is 99 out of 100, based on EPA contaminant data, violation history, and testing results across the 4 systems serving the city.
What are the top contaminants in Oroville?
The top contaminants detected in Oroville include Lead (90th percentile). View detailed information on our contaminants page.
Oroville Water Quality Summary
Oroville, CA receives a water quality score of 99/100 (Grade A) based on EPA Safe Drinking Water Information System (SDWIS) compliance data for 4 public water systems serving the area.
Oroville's water quality is above the national average, with strong compliance records and low contaminant levels. Residents generally receive clean, safe tap water that meets EPA standards.
Oroville's score of 99 is 10 points above the California state average of 89, and above the nationwide average of roughly 78/100 across all U.S. states.
For households in Oroville, California, the local tap water delivers near-perfect quality that stands out as a major benefit for prospective homebuyers. Because this mid-size city is situated in a West Coast region shaped by large urban centers, Central Valley agriculture, and varied geology, maintaining top-tier standards across its multiple water systems is a reassuring achievement. Residents can feel confident that their daily drinking supply is exceptionally clean, showing that the community's infrastructure successfully manages these diverse regional dynamics.
Water quality data is sourced from the U.S. EPA SDWIS database and updated quarterly. Learn about our scoring methodology → Read our California water quality rankings report →
Key Contaminants
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Water Systems Serving Oroville (4)
Hard Rock Fire Mountain Water System
AThermalito Water & Sewer Dist
ASouth Feather W&P - Miners Ranch
AButte-Glenn Community College Dist
ACheck Your Specific Address
Water quality can vary by neighborhood in Oroville.
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Compare Oroville water quality: View all states · Contaminant library · How we score water quality