C52/100
Loon Lake Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 14,071 residents · Washington
What's In Loon Lake's Tap Water?
31
Contaminants Tested
0
Exceed EPA Limits
0
Above EPA Goals
EPA Violation History
3
Violations (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
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
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
STEVENS CO PUD - LOON LAKE
Population Served
2,487
Water Source
Groundwater
System ID
WA5348250
STEVENS CO PUD - SUNCREST
Population Served
7,484
Water Source
Groundwater
System ID
WA5385202
STEVENS CO PUD - WAITTS LAKE
Population Served
1,216
Water Source
Groundwater
System ID
WA5391130
STEVENS CO PUD - DEER LAKE
Population Served
2,884
Water Source
Groundwater
System ID
WA5393380
Frequently Asked Questions About Loon Lake Water
Is Loon Lake tap water safe to drink?
Loon Lake, Washington tap water receives a grade of C (52/100), which is considered fair. 1 contaminant(s) exceed EPA maximum contaminant levels and 221 violation(s) are on record. Residents should consider using an NSF-certified water filter to reduce contaminant exposure.
What contaminants are in Loon Lake's water?
Of the 32 contaminants tested in Loon Lake'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 Loon Lake have any water quality violations?
Yes, Loon Lake has 221 EPA violation(s) on record, with the most recent in 2024. Violation types include MR, MON, MCL. 2 of these are health-based violations, which are the most serious category.
Do I need a water filter in Loon Lake?
Based on EPA data, using a water filter in Loon Lake 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 Loon Lake's tap water come from?
Loon Lake's drinking water is sourced from groundwater and supplied by STEVENS CO PUD - LOON LAKE and 3 other water system(s). The system serves approximately 14,071 people. Groundwater is pumped from underground aquifers, which often provides natural filtration.
How often is Loon Lake'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. Loon Lake'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 Loon Lake's water compare to other cities in Washington?
Loon Lake's water quality score of 52/100 earns a grade of C, which is considered fair. This is a below-average score that indicates room for improvement. Visit our Washington state page to see how all cities in the state compare.
What should I do if I'm concerned about Loon Lake's water quality?
If you have concerns about Loon Lake'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 (STEVENS CO PUD - LOON LAKE) 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.