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ZIP Code 96843 Water Quality
Hawaii · 951,947 people served · 8 water systems
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ExcellentZIP code 96843 is in Hawaii and is a large city from a drinking-water-service perspective, with 951,947 people served by 8 EPA-registered public water systems. It corresponds to HONOLULU.
Within ZIP code 96843, the EPA Safe Drinking Water Information System (SDWIS) records no health-based Maximum Contaminant Level (MCL) exceedances during the past five years across the 8 water systems serving this postal area.
Last updated: 2026-05-18 · Source: EPA SDWIS
ZIP Code Location
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Cities in ZIP 96843
Water Systems Serving 96843
HNL-WINDWARD-PEARL HARBOR
PWSID: HI0000331
631,389 served
WAIALUA-HALEIWA
PWSID: HI0000332
9,996 served
WAHIAWA
PWSID: HI0000333
23,348 served
WAIPIO HEIGHTS
PWSID: HI0000334
11,516 served
WAIPAHU-EWA-WAIANAE
PWSID: HI0000335
217,479 served
WAIALEE-SUNSET BEACH
PWSID: HI0000366
4,916 served
MILILANI
PWSID: HI0000367
50,573 served
KAHUKU
PWSID: HI0000365
2,730 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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