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ZIP Code 63368 Water Quality
Missouri · 110,092 people served · 10 water systems
A
ExcellentZIP code 63368 is in Missouri and is a mid-sized community from a drinking-water-service perspective, with 110,092 people served by 10 EPA-registered public water systems. It corresponds to O'FALLON.
Within ZIP code 63368, the EPA Safe Drinking Water Information System (SDWIS) records no health-based Maximum Contaminant Level (MCL) exceedances during the past five years across the 10 water systems serving this postal area.
Last updated: 2026-05-18 · Source: EPA SDWIS
ZIP Code Location
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Cities in ZIP 63368
Water Systems Serving 63368
ST CHARLES PWSD 2 FORISTELL
PWSID: MO6010287
550 served
ST CHARLES CO PWSD 2 - SUMAC RIDGE
PWSID: MO6031209
103 served
ST CHARLES CO PWSD #2 WRIGHT CITY
PWSID: MO6010874
3,550 served
ECM WATER & SEWER AUTHORITY - FLINT HILL
PWSID: MO6011147
469 served
ST PAUL PWS
PWSID: MO6011535
1,700 served
ST CHARLES COUNTY PWSD 2 NORTH OAK DR
PWSID: MO6021633
660 served
ST CHARLES COUNTY PWSD 2
PWSID: MO6024530
100,587 served
ST CHARLES CO PWSD 2 AUGUSTA
PWSID: MO6024531
881 served
ST CHARLES COUNTY PWSD 2 DUTZOW
PWSID: MO6024628
400 served
ST CHARLES COUNTY PWSD 2 WARREN
PWSID: MO6024629
1,192 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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