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ZIP Code 95403 Water Quality
California · 2,891 people served · 9 water systems
B
GoodZIP code 95403 is in California and is a small town from a drinking-water-service perspective, with 2,891 people served by 9 EPA-registered public water systems. It corresponds to SANTA ROSA.
Within ZIP code 95403, the EPA Safe Drinking Water Information System (SDWIS) records 1 health-based violation during the past five years across 9 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 95403
Water Systems Serving 95403
BLUE LAKES VILLAGE
PWSID: CA1700596
65 served
SONOMA COUNTY WATER AGENCY
PWSID: CA4910020
0 served
MOBILE HOME ESTATES
PWSID: CA4900720
210 served
WEST WATER COMPANY (PUC)
PWSID: CA4900893
40 served
SONOMA COUNTY CSA 41-FITCH MOUNTAIN
PWSID: CA4910010
1,265 served
SONOMA COUNTY CSA 41-FREESTONE
PWSID: CA4900549
290 served
SONOMA COUNTY CSA 41-SALMON CREEK
PWSID: CA4900543
427 served
SONOMA COUNTY CSA 41-JENNER
PWSID: CA4900532
406 served
SHAMROCK MOBILE HOME PARK
PWSID: CA4900723
188 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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