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City water profile

Wahiawa water quality

Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Wahiawa, Hawaii.

Median indexed hardness

57PPM

One indexed ZIP

Range 57.1–57.1 PPM

State comparison
At state median
State hardness rank
#6 of 12
Matched utilities
4
Active health records
0

City summary

What the indexed records say

Wahiawa has 1 published ZIP profile across Honolulu County. The indexed median is 57 PPM, compared with 57 PPM across Hawaii.

Among the 12 Hawaiicities with an indexed median, Wahiawa ranks #6from highest to lowest. Across all 28 state ZIP profiles, available estimates run from 15.6to 125 PPM.

Because only one ZIP is represented, the city median and range are the same local estimate. It should not be read as multiple independent samples across the community.

Hardness distribution

How local ZIP estimates compare

Soft1 ZIP
Moderately hard0 ZIPs
Hard0 ZIPs
Very hard0 ZIPs

1 of 1 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance
1.9 miles
Profiles with evidence
1/1

Confidence labels

High: 0Moderate: 1Low: 0

Observation window: Aug 14, 2024 to Dec 10, 2024.

ZIP directory

Water reports in Wahiawa

Open a ZIP for site-level provenance and measurements.

ZIP code

96786

Soft

57.1 PPM

Nearest site
1.9 mi
Confidence
Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

Nctams Eastpac

PWSID HI0000357

Groundwater
System population served
6,470
Last reported
Jun 3, 2026

The system names this served city; Census place overlap links the city to this ZCTA.

Kunia Village

PWSID HI0000303

Groundwater
System population served
650
Last reported
Jun 3, 2026

The system names this served city; Census place overlap links the city to this ZCTA.

Camp Stover

PWSID HI0000354

Groundwater
System population served
595
Last reported
Jun 3, 2026

The system names this served city; Census place overlap links the city to this ZCTA.

Poamoho

PWSID HI0000371

Groundwater
System population served
25
Last reported
Jun 3, 2026

The system names this served city; Census place overlap links the city to this ZCTA.

Compliance history

What EPA records show

No active health-based violation appears among the associated systems in the represented EPA reporting quarter. This does not mean every contaminant was tested at every tap.

No violation records are included in the current lookback window.

Practical next steps

Move from index to evidence

  1. 1. Open your ZIP. Check distance, dates, confidence, and the associated utility.
  2. 2. Read the current CCR. Confirm source water, detections, limits, ranges, and notices.
  3. 3. Test the tap when needed. Confirm health concerns or treatment sizing with the right method.

Questions people ask

About water in Wahiawa

Is the water hard?

The indexed city median is 57 PPM. Open the ZIP report to verify the distance and confidence behind that estimate.

Is the tap water safe?

Compliance history is utility-wide and cannot guarantee conditions at every tap. Check current notices and test when address-specific evidence is needed.

Do I need treatment?

Choose treatment only after confirming the problem at the property. A softener targets hardness; contaminant treatment requires a matching, verified performance claim.