C54/100
Eureka Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 5,236 residents · Kansas
What's In Eureka's Tap Water?
1
Contaminants Tested
0
Exceed EPA Limits
1
Above EPA Goals
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.001 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
3
Violations (last 5yr)
2
Unresolved
0
Health-Related
TIER 3Unresolved
Reporting Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
TIER 3Unresolved
Failed to complete routine monitoring
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: July 1, 2025 – July 31, 2025Rule: Surface Water Treatment RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 3Resolved
Reporting violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: October 17, 2024Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
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
GREENWOOD CO RWD 2
Population Served
1,062
Water Source
Purchased Surface Water
System ID
KS2007302
GREENWOOD CO RWD 1
Population Served
1,885
Water Source
Purchased Surface Water
System ID
KS2007305
EUREKA, CITY OF
Population Served
2,289
Water Source
Surface Water
System ID
KS2007306
Frequently Asked Questions About Eureka Water
Is Eureka tap water safe to drink?
Eureka, Kansas tap water receives a grade of C (54/100), which is considered fair. 0 contaminant(s) exceed EPA maximum contaminant levels and 76 violation(s) are on record. Residents should consider using an NSF-certified water filter to reduce contaminant exposure.
What contaminants are in Eureka's water?
Of the 4 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 76 EPA violation(s) on record, with the most recent in 2025. Violation types include RPT, MR, MON. 13 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 surface water and supplied by GREENWOOD CO RWD 2 and 2 other water system(s). The system serves approximately 5,236 people. Surface water sources include rivers, lakes, and reservoirs.
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 Kansas?
Eureka's water quality score of 54/100 earns a grade of C, which is considered fair. This is a below-average score that indicates room for improvement. Visit our Kansas 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 (GREENWOOD CO RWD 2) 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.