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ZIP Code 91773 Water Quality
California · 203,277 people served · 9 water systems
A
ExcellentZIP code 91773 is in California and is a mid-sized community from a drinking-water-service perspective, with 203,277 people served by 9 EPA-registered public water systems. It corresponds to SAN DIMAS.
Within ZIP code 91773, the EPA Safe Drinking Water Information System (SDWIS) records no health-based Maximum Contaminant Level (MCL) exceedances during the past five years across the 9 water systems serving this postal area.
Last updated: 2026-05-18 · Source: EPA SDWIS
ZIP Code Location
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Cities in ZIP 91773
Water Systems Serving 91773
GOLDEN STATE WATER MORONGO DELNORTE
PWSID: CA3600270
373 served
GSWC - CLAREMONT
PWSID: CA1910024
39,730 served
GSWC-SAN DIMAS
PWSID: CA1910142
56,538 served
GSWC-SOUTH ARCADIA
PWSID: CA1910212
27,072 served
GSWC-SOUTH SAN GABRIEL
PWSID: CA1910223
26,240 served
GSWC - CALIPATRIA
PWSID: CA1310003
7,363 served
FORT BLISS MAIN POST AREA
PWSID: TX0710020
28,000 served
FORT BLISS BIGGS ARMY AIRFIELD
PWSID: TX0710078
2,961 served
EAST BIGGS WATER SYSTEM
PWSID: TX0710187
15,000 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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