C54/100
Lopez Island Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 1,195 residents · Washington
What's In Lopez Island'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) | 1.76 mg/L | 1.30 mg/L | Over Limit |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2008.
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
FISHERMAN BAY WATER ASSOCIATION
Population Served
1,195
Water Source
Groundwater
System ID
WA5325547
Frequently Asked Questions About Lopez Island Water
Is Lopez Island tap water safe to drink?
Lopez Island, Washington tap water receives a grade of C (54/100), which is considered fair. 1 contaminant(s) exceed EPA maximum contaminant levels and 30 violation(s) are on record. Residents should consider using an NSF-certified water filter to reduce contaminant exposure.
What contaminants are in Lopez Island's water?
Of the 2 contaminants tested in Lopez Island's water supply, the most notable include Copper (90th percentile). 1 contaminant(s) exceed EPA legal limits (MCLs). 1 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.
Does Lopez Island have any water quality violations?
Yes, Lopez Island has 30 EPA violation(s) on record, with the most recent in 2008. Violation types include MR, MCL, Other. 2 of these are health-based violations, which are the most serious category.
Do I need a water filter in Lopez Island?
Based on EPA data, using a water filter in Lopez Island 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 Lopez Island's tap water come from?
Lopez Island's drinking water is sourced from groundwater and supplied by FISHERMAN BAY WATER ASSOCIATION. The system serves approximately 1,195 people. Groundwater is pumped from underground aquifers, which often provides natural filtration.
How often is Lopez Island'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. Lopez Island'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 Lopez Island's water compare to other cities in Washington?
Lopez Island'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 Washington state page to see how all cities in the state compare.
What should I do if I'm concerned about Lopez Island's water quality?
If you have concerns about Lopez Island'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 (FISHERMAN BAY WATER ASSOCIATION) 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.