US Water Score: A
Water Quality Summary
Tap water quality in Mountlake Terrace, Washington (98043) receives an overall grade of A (Lower record-based concern) with a score of 85 out of 100, based on analysis of EPA compliance data, contaminant testing, and violation history. This is 6 points below the Washington state average of 91. The area is served by Mountlake Terrace City Of, a surface water system providing water to approximately 26,402 people.
A score of 85/100 means public water-system records for Mountlake Terrace, WA show relatively few concerns in the US Water Score model. This is an internal score, not an EPA safety rating, and it does not guarantee conditions at any specific tap.
Common Questions
Based on public water-system records, Mountlake Terrace, Washington receives an internal US Water Score grade of A (Lower record-based concern) with a score of 85/100. This indicates relatively few system-level concerns in our model, but it is not an EPA safety rating and does not guarantee tap conditions inside individual homes.
ZIP code 98043 is served by 1 water system using surface water sources, providing water to approximately 26,402 people. Surface water systems are more susceptible to contamination from agricultural runoff, industrial discharge, and weather events, but typically undergo more extensive treatment including filtration and disinfection.
No lead data is currently available for ZIP code 98043. This may mean lead testing results haven't been reported recently, or the serving water system uses monitoring waivers. You can request a free lead test kit from most water utilities or purchase a certified home testing kit.
No PFAS ("forever chemicals") were detected in water systems serving Mountlake Terrace, Washington during the most recent EPA monitoring period (UCMR5). However, not all water systems have been tested for all PFAS compounds, and new contamination can occur over time.
Water systems serving Mountlake Terrace, Washington have received 3 violations in the last 5 years. Violations can range from paperwork issues (monitoring & reporting) to serious health-based violations where contaminant levels exceeded safe limits. Review the violation details above for specifics.
Water in Mountlake Terrace, Washington shows no major contaminant concerns based on available data. A basic carbon filter can improve taste and reduce chlorine. For extra peace of mind, an NSF-certified pitcher filter or faucet-mount filter provides an affordable layer of protection.