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ZIP Code 98038 Water Quality
Washington · 29,155 people served · 7 water systems
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ExcellentZIP code 98038 is in Washington and is a small city from a drinking-water-service perspective, with 29,155 people served by 7 EPA-registered public water systems. It corresponds to Maple Valley.
Within ZIP code 98038, the EPA Safe Drinking Water Information System (SDWIS) records no health-based Maximum Contaminant Level (MCL) exceedances during the past five years across the 7 water systems serving this postal area.
Last updated: 2026-05-18 · Source: EPA SDWIS
ZIP Code Location
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Cities in ZIP 98038
Water Systems Serving 98038
REED RANCH ROAD WATER
PWSID: WA5311985
36 served
BILLINGTON
PWSID: WA5380710
34 served
EDGEHILL WATER ASSN
PWSID: WA5322400
109 served
INDIAN RIDGE WATER ASSOCIATION
PWSID: WA5335639
216 served
CEDAR RIVER WATER & SEWER DISTRICT
PWSID: WA5341800
28,671 served
VALLEYBROOK VILLAGE
PWSID: WA5391080
65 served
165th Ave Water System
PWSID: WA5325241
24 served
About ZIP-code water data
Postal-code level water quality data is built up from the underlying water systems — multiple ZIPs may share a single utility, and a single ZIP can span multiple utilities. For property-level information, contact the specific utility serving your address. EPA data on this page was last refreshed on 2026-05-18.
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