WH

Public water system

Mililani

PWSID HI0000367 - Honolulu County, Hawaii

70 PPM
4.1 GPG
Slightly Hard
0Soft60120180300+
Slightly Hard (70 PPM)Verified - Annual Water Quality Report

System Details

Water source
groundwater
Population served
50,573
Service connections
11,915
Status
Active

Hardness Evidence

Reported hardness
70 PPM
Grains per gallon
4.1 GPG
Data source
Annual Water Quality Report
Source year
N/A
Raw/source estimate
55 PPM

Linked City Reports

Aiea, HIEwa Beach, HIKapolei, HIHaleiwa, HIHauula, HIKaaawa, HIKahuku, HIKailua, HIKaneohe, HIKunia, HILaie, HIPearl City, HIWahiawa, HIMililani, HIWaialua, HIWaianae, HIWaimanalo, HIWaipahu, HIHonolulu, HIKaneohe Mcas, HI

Served ZIP Codes

ZIPLocationZIP average
96701Aiea, HISlightly Hard (70 PPM)
96706Ewa Beach, HISlightly Hard (70 PPM)
96707Kapolei, HISlightly Hard (70 PPM)
96712Haleiwa, HISlightly Hard (70 PPM)
96717Hauula, HISlightly Hard (70 PPM)
96730Kaaawa, HISlightly Hard (70 PPM)
96731Kahuku, HISlightly Hard (70 PPM)
96734Kailua, HISlightly Hard (70 PPM)
96744Kaneohe, HISlightly Hard (70 PPM)
96759Kunia, HISlightly Hard (70 PPM)
96762Laie, HISlightly Hard (70 PPM)
96782Pearl City, HISlightly Hard (70 PPM)
96786Wahiawa, HISlightly Hard (70 PPM)
96789Mililani, HISlightly Hard (70 PPM)
96791Waialua, HISlightly Hard (70 PPM)
96792Waianae, HISlightly Hard (70 PPM)
96795Waimanalo, HISlightly Hard (70 PPM)
96797Waipahu, HISlightly Hard (70 PPM)
96813Honolulu, HISlightly Hard (70 PPM)
96814Honolulu, HISlightly Hard (70 PPM)
96815Honolulu, HISlightly Hard (70 PPM)
96816Honolulu, HISlightly Hard (70 PPM)
96817Honolulu, HISlightly Hard (70 PPM)
96818Honolulu, HISlightly Hard (70 PPM)
96819Honolulu, HISlightly Hard (70 PPM)
96821Honolulu, HISlightly Hard (70 PPM)
96822Honolulu, HISlightly Hard (70 PPM)
96825Honolulu, HISlightly Hard (70 PPM)
96826Honolulu, HISlightly Hard (70 PPM)
96863Kaneohe Mcas, HISlightly Hard (70 PPM)

How to Use This System Page

A public water system can serve multiple ZIP codes and cities. Use this page to inspect the source behind the hardness reading, then open the linked ZIP or city page for the local rollup.

If you are sizing treatment equipment, confirm your actual tap hardness with a home test or lab test before buying.

MethodologySourcesSearch by ZIP