A92/100
Eureka Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 27,078 residents · California
What's In Eureka's Tap Water?
66
Contaminants Tested
0
Exceed EPA Limits
1
Above EPA Goals
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.002 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 1993.
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
EUREKA, CITY OF
Population Served
27,078
Water Source
Purchased Groundwater
System ID
CA1210004
Frequently Asked Questions About Eureka Water
Is Eureka tap water safe to drink?
Eureka, California tap water receives a grade of A (92/100), which is considered excellent. Out of 66 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 Eureka's water?
Of the 66 contaminants tested in Eureka'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 Eureka have any water quality violations?
Yes, Eureka has 1 EPA violation(s) on record, with the most recent in 1993. Violation types include TT. 1 of these are health-based violations, which are the most serious category.
Do I need a water filter in Eureka?
Eureka 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 Eureka's tap water come from?
Eureka's drinking water is sourced from purchased groundwater and supplied by EUREKA, CITY OF. The system serves approximately 27,078 people. Groundwater is pumped from underground aquifers, which often provides natural filtration.
How often is Eureka'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. Eureka'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 Eureka's water compare to other cities in California?
Eureka's water quality score of 92/100 earns a grade of A, which is considered excellent. This places Eureka 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 Eureka's water quality?
If you have concerns about Eureka'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 (EUREKA, CITY OF) 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.