A93/100
Oroville Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 34,800 residents · California
What's In Oroville's Tap Water?
69
Contaminants Tested
0
Exceed EPA Limits
1
Above EPA Goals
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.005 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
This system has a clean compliance history.
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
SOUTH FEATHER W&P - MINERS RANCH
Population Served
22,664
Water Source
Surface Water
System ID
CA0410006
THERMALITO WATER & SEWER DIST
Population Served
12,136
Water Source
Surface Water
System ID
CA0410008
Frequently Asked Questions About Oroville Water
Is Oroville tap water safe to drink?
Oroville, California tap water receives a grade of A (93/100), which is considered excellent. Out of 69 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 Oroville's water?
Of the 69 contaminants tested in Oroville's water supply, the most notable include Lead (90th percentile). 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 Oroville have any water quality violations?
Yes, Oroville has 6 EPA violation(s) on record, with the most recent in 2022. Violation types include MR, MCL. 2 of these are health-based violations, which are the most serious category.
Do I need a water filter in Oroville?
Oroville 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 Oroville's tap water come from?
Oroville's drinking water is sourced from surface water and supplied by SOUTH FEATHER W&P - MINERS RANCH and 1 other water system(s). The system serves approximately 34,800 people. Surface water sources include rivers, lakes, and reservoirs.
How often is Oroville'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. Oroville'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 Oroville's water compare to other cities in California?
Oroville's water quality score of 93/100 earns a grade of A, which is considered excellent. This places Oroville 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 Oroville's water quality?
If you have concerns about Oroville'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 (SOUTH FEATHER W&P - MINERS RANCH) 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.