Air Qualityi
Water Systemsi
Water Violationsi
61Air Quality — Whatcom County (2025)i
AQSThe Air Quality Index measures how clean or polluted the air is on a given day. AQI is reported at the county level. A score of 0–50 is considered good; 51–100 is moderate; above 100 may be unhealthy for sensitive groups.
Median AQI
PM2.5 Daysi
143Ozone Daysi
94Drinking Wateri
SDWISPublic water systems registered to serve this area. Community systems (CWS) provide water to residents year-round. Transient systems serve places like gas stations or restaurants. Violations indicate a system failed to meet federal drinking water standards.
Community Systemsi
29Active Systemsi
18Recent Violationsi
61Recent Violations (Last 5 Years)
Historical Violations (Over 5 Years Ago)
ANDERSON CREEK WATER ASSOCIATION
RED RIVER/LAKE TERRELL
CHUCKANUT TRAILS WATER SYSTEM
BELLINGHAM-WATER DIVISION CITY OF
LWWSD - EAGLERIDGE
COUNTRY HAVEN WATER ASSOC
OLD GUIDE WATER ASSOCIATION
Glen Cove Water Association