Coupeville, WA Water Quality Report

Is Coupeville tap water safe? See PFAS and lead contamination levels for Coupeville, Washington. Compare to EPA limits and get filter recommendations.

Quick Answers

Is Coupeville, WA tap water safe to drink? Coupeville, WA tap water meets most federal EPA limits, but PFAS compounds have been detected at an average of 0.01 ppt across 3 compounds. A certified pitcher filter or reverse osmosis system is recommended for sensitive populations.

What contaminants are in Coupeville, WA water? Top PFAS compounds detected in Coupeville water: PFHxA (0.01 ppt), PFBA (0.01 ppt), PFPeA (0.01 ppt). See the full table for all monitored contaminants and comparison to EPA limits.

What filter should I use in Coupeville, WA? For Coupeville, WA households, reverse osmosis removes 90%+ of PFAS, lead, and arsenic. NSF-53 certified pitcher and faucet filters (ZeroWater, Clearly Filtered, LifeStraw) work for smaller households. Skip standard Brita filters for PFAS removal.

Coupeville, WA Water Quality Summary

EPA testing has detected PFAS "forever chemicals" in Coupeville, WA drinking water. Recent monitoring found a peak level of 0.01 ppt across 1 water system, representing an average of 0.01 ppt across 3 detected compounds.

Contamination Level: LOW – Low contamination – PFAS detected but at lower levels; monitoring continues.

Top Detected Compounds

  • PFHxA: 0.01 ppt
  • PFBA: 0.01 ppt
  • PFPeA: 0.01 ppt

Lead in Coupeville, WA Water

EPA Lead and Copper Rule testing has recorded 156 lead samples for Coupeville water systems, with a 90th-percentile high of 0.019 mg/L (above the EPA 0.015 mg/L action level). There is no safe level of lead for children; if your home was built before 1986, a certified NSF/ANSI 53 lead-removal filter is recommended.

EPA Violations in Coupeville, WA

Coupeville public water systems have 95 health-based EPA Safe Drinking Water Act violations on record, including Nitrite, Haloacetic Acids (HAA5), Total Trihalomethanes (TTHMs), Lead, Lead & Copper Rule. Health-based violations mean a contaminant exceeded its federal limit or required treatment was not applied.

About the Data

Source: EPA UCMR5 (Unregulated Contaminant Monitoring Rule 5), the 2023-2025 national testing program spanning 66,000+ public water systems – the broadest drinking water survey ever run in the US. Coupeville, WA serves a population of roughly 1,831.

ZIP Codes Served

98239

What Coupeville, Washington Residents Should Do

  1. Enter your exact ZIP code at knowyourexposure.com for address-level data
  2. Request the latest Consumer Confidence Report (CCR) from your Washington utility – it is free and updated annually
  3. Choose a filter certified for PFAS: NSF/ANSI 58 reverse osmosis (94-99% removal) or an NSF-53 pitcher
  4. High-exposure households (pregnancy, infants, immunocompromised) should also consider a PFAS home test kit