Joint Base Lewis-Mcchord

Joint Base Lewis-Mcchord, WA receives a water quality score of 99/100 (Grade A) based on EPA Safe Drinking Water Information System (SDWIS) compliance data for 2 public water systems serving the area.

Joint Base Lewis-Mcchord's water quality is above the national average, with strong compliance records and low contaminant levels. Residents generally receive clean, safe tap water that meets EPA standards.

Joint Base Lewis-Mcchord's score of 99 is 4 points above the Washington state average of 95, and above the nationwide average of roughly 78/100 across all U.S. states.

Nestled in the Pacific Northwest, Joint Base Lewis-Mcchord benefits from a regional backdrop of forested mountains and the Puget Sound coastline, which generally provides clean source water. For homebuyers and residents of this Washington mid-size city, the local tap water consistently meets near-perfect standards of purity and reliability. This strong safety profile means that families can trust the quality of their water for everyday household use.

Water quality data is sourced from the U.S. EPA SDWIS database and updated quarterly. Learn about our scoring methodology → Read our Washington water quality rankings report →