D31/100
Leavenworth Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 10,388 residents · Washington
What's In Leavenworth's Tap Water?
2
Contaminants Tested
1
Exceed EPA Limits
0
Above EPA Goals
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.45 mg/L | 1.30 mg/L | Over Limit |
EPA Violation History
1
Violation (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Exceeded the MCL for disinfection byproducts
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: January 1, 2024 – December 31, 2024Enforcement: 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
LEAVENWORTH CITY OF
Population Served
9,218
Water Source
Surface Water
System ID
WA5346500
PONDEROSA COMMUNITY CLUB INC
Population Served
1,170
Water Source
Groundwater
System ID
WA5368417
Frequently Asked Questions About Leavenworth Water
Is Leavenworth tap water safe to drink?
Leavenworth, Washington tap water receives a grade of D (31/100), which is considered poor. 1 contaminant(s) exceed EPA maximum contaminant levels and 78 violation(s) are on record. Residents should consider using an NSF-certified water filter to reduce contaminant exposure.
What contaminants are in Leavenworth's water?
Of the 2 contaminants tested in Leavenworth's water supply, the most notable include Copper (90th percentile), Lead (90th percentile). 1 contaminant(s) exceed EPA legal limits (MCLs). 2 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.
Does Leavenworth have any water quality violations?
Yes, Leavenworth has 78 EPA violation(s) on record, with the most recent in 2024. Violation types include MR, Other, MON. 15 of these are health-based violations, which are the most serious category.
Do I need a water filter in Leavenworth?
Based on EPA data, using a water filter in Leavenworth is recommended. 1 contaminant(s) exceed legal limits. An NSF-certified filter — such as a reverse osmosis or activated carbon system — can effectively reduce many common contaminants. Choose a filter certified to remove the specific contaminants found in your area.
Where does Leavenworth's tap water come from?
Leavenworth's drinking water is sourced from surface water and supplied by LEAVENWORTH CITY OF and 1 other water system(s). The system serves approximately 10,388 people. Surface water sources include rivers, lakes, and reservoirs.
How often is Leavenworth'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. Leavenworth'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 Leavenworth's water compare to other cities in Washington?
Leavenworth's water quality score of 31/100 earns a grade of D, which is considered poor. This is a concerning score that suggests significant water quality issues. Visit our Washington state page to see how all cities in the state compare.
What should I do if I'm concerned about Leavenworth's water quality?
If you have concerns about Leavenworth'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 (LEAVENWORTH 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.