Friday Harbor, WA: 13 Health Violations — 70/100 (2026)
1 ZIP code · 5 water systems · Updated 2026-06-03
The water systems supplying Friday Harbor show a track record of above-average compliance with federal standards — consistently among the better performers in WA.
How Friday Harbor Compares
Data: EPA SDWIS Last verified: 2026-06-03
Friday Harbor Water: The Quick Version
- Your city's water systems recorded 19 violations in the past 5 years.
- Average lead level: 0.005 mg/L.
- Homes built before 1986: 43% — older plumbing may contain lead solder.
- Estimated remediation: $1,800 per household.
- CDC health risk index: 12.38 — above typical levels.
Water Systems Serving Friday Harbor
At present, 3 utilities serve the bulk of Friday Harbor, WA's residential water connections out of 5 systems active in the area, spread across independent providers with separate infrastructure and compliance obligations.
Overview
We track water quality and home safety data for 1 ZIP code in Friday Harbor, Washington, covering 5 community water systems serving approximately 9,127 people.
1 of 1 ZIP code (100%) have recorded EPA violations. 13 health-based violations documented.
Home Safety Score
Average Home Safety Score for Friday Harbor: B (70/100)
The score combines three factors:
| Factor | What It Measures |
|---|---|
| Water Quality | EPA violations and compliance history |
| Lead Levels | 90th percentile lead concentration vs EPA action level |
| Radon Risk | EPA radon zone classification |
Water Sources
Friday Harbor water systems draw from: Groundwater, Surface water.
Lead & Copper
- Average lead level (90th percentile): 0.0050 mg/L (EPA action level: 0.015 mg/L)
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 3 (Low Risk)
Top Contaminants
| Contaminant | Category | Violations | ZIPs Affected |
|---|---|---|---|
| Haloacetic Acids (HAA5) | Disinfection Byproducts | 30 | 1 |
| Total Trihalomethanes (TTHM) | Disinfection Byproducts | 4 | 1 |
| Surface Water Treatment Rule | Treatment Technique | 2 | 1 |
| E. coli | Microbiological | 2 | 1 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 98250 | B | 19 | 13 | Friday Harbor Town of |
All ZIP Codes in Friday Harbor
- 98250 [B] — 19 violations ⚠
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- Radon: EPA Map of Radon Zones
Updated daily.
CDC Health Data for Friday Harbor
Source: CDC PLACES (County-level estimates). Water contamination can correlate with respiratory and chronic health conditions.
Compared to National Average
Vertical line = national average. ■ Above national · ■ Below national
Key Contaminants Detected in Friday Harbor
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
How Old Is Friday Harbor's Housing Stock?
With 43% of homes built before 1986, lead solder in plumbing is a potential concern. The EPA banned lead solder in 1986, but many older homes retain original plumbing.
Source: U.S. Census Bureau American Community Survey (ACS).
Housing Age Profile
Pre-1986 construction carries elevated plumbing-era lead risk because lead solder was widely used before that federal ban. In Friday Harbor, the median build year of 1999 indicates a housing stock where that older fraction represents a significant share of the residential inventory.
Most homes in Friday Harbor were built after 1986, reducing the risk of lead contamination from plumbing. Older homes should still be tested.
Source: U.S. Census Bureau ACS B25034.
Friday Harbor: Remediation Cost in Perspective
Because property values in Friday Harbor comfortably exceed estimated remediation costs, the equity impact here is proportionally small.
Remediation costs in Friday Harbor are relatively low compared to home values. The $1,100–$3,300 estimated range is a small fraction of median property value. Home values are 60% above the Washington average.
Protecting Children from Lead in Friday Harbor
Why children are most at risk: The CDC states there is no safe level of lead exposure for children. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.
Even where utility-side monitoring meets Lead and Copper Rule requirements, the 43% pre-rule share in Friday Harbor keeps interior-plumbing variation as a household-level question that aggregate data cannot resolve.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Climate-Related Water Risk for Friday Harbor
Flood risk in Friday Harbor occupies the middle ground: 4 NFIP claims and 100% of local ZIP codes within FEMA flood zones. At that level, the risk pathways connecting flooding to water quality — treatment system stress, well infiltration, distribution backflow — become relevant considerations during significant flood events, even if day-to-day water quality is unaffected by flood history.
Friday Harbor has a moderate flood history with 4 FEMA claims averaging $6,602 per payout. 100% of ZIP codes fall within FEMA flood zones. Flood events can contaminate drinking water and overwhelm treatment systems.
How flooding affects water quality: Flood events can introduce sewage, agricultural runoff, and industrial chemicals into water supplies. Even after floodwaters recede, contamination can persist in wells and aging infrastructure. Flood damage can add significantly to the estimated <strong>$1,800</strong> remediation cost per household.
Residents in flood-prone areas should consider flood insurance even outside FEMA zones — over 25% of flood claims come from low-to-moderate risk areas. After any flood event, test your water before drinking.
Source: FEMA National Flood Insurance Program (NFIP) claims data, FEMA flood zone designations.
Deep Dive Reports
Detailed analysis for Friday Harbor, WA