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ZIP Code 99362 Water Quality
Washington · 48,915 people served · 15 water systems
B
GoodZIP code 99362 is in Washington and is a small city from a drinking-water-service perspective, with 48,915 people served by 15 EPA-registered public water systems. It overlaps with 2 communities including Walla Walla, WALLA WALLA.
Within ZIP code 99362, the EPA Safe Drinking Water Information System (SDWIS) records 1 health-based violation during the past five years across 15 water systems serving this postal area. The grade of B reflects the aggregate compliance pattern, not the current daily water quality.
Last updated: 2026-05-18 · Source: EPA SDWIS
ZIP Code Location
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Cities in ZIP 99362
Water Systems Serving 99362
CONSOLIDATED IRRIGATION DIST 14
PWSID: WA5314650
1,555 served
SUMMERS CIRCLE WATER LLC
PWSID: WA5307937
82 served
BLALOCK ORCHARD DIST 10
PWSID: WA5307350
250 served
DIXIE WATER ASSOCIATION
PWSID: WA5319480
240 served
GREEN TANK IRR DISTRICT 11
PWSID: WA5329550
553 served
HYDRO IRRIGATION DISTRICT NO 9
PWSID: WA5335275
260 served
KOOSKOOSKIE CABIN OWNERS INC.
PWSID: WA5334751
45 served
PRESCOTT TOWN OF
PWSID: WA5369250
522 served
PROSPECT HEIGHTS COMM WATER ASSN
PWSID: WA5369700
40 served
SYDNEY HEIGHTS WATER ASSN
PWSID: WA5386647
130 served
BLALOCK ORCHARDS DIST 12
PWSID: WA5307400
193 served
WALLA WALLA UNIVERSITY
PWSID: WA5392470
1,273 served
VALLE LINDO HOMES
PWSID: WA5392475
787 served
WALLA WALLA WATER DIVISION
PWSID: WA5392500
42,959 served
RESER CREEK WATER SYSTEM
PWSID: WA5304761
26 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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