Is tap water safe in Hooper Bay?

EPA SDWIS shows no active health-based violation in this profile's reporting window. That is not the same as proving every contaminant is absent, and federal data can lag state and utility records.

How hard is the water in Hooper Bay, AK?

There are not enough qualifying nearby USGS hardness observations for a responsible estimate. Test the home's tap or consult the serving utility.

Do I need a water softener in ZIP code 99604?

There is no high-hardness trigger in this profile. Confirm conditions with an at-home hardness test before purchasing equipment.

City water profile

Hooper Bay water quality

Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Hooper Bay, Alaska.

Median indexed hardness

—

One indexed ZIP

Range —–— PPM

State comparison: Unavailable
State hardness rank: —
Matched utilities: 1
Active health records: 0

City summary

What the indexed records say

Hooper Bay has 1 published ZIP profile across Kusilvak Census Area. No qualifying nearby hardness observation is available for the city.

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

Soft0 ZIPs

Moderately hard0 ZIPs

Hard0 ZIPs

Very hard0 ZIPs

0 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: — miles
Profiles with evidence: 0/1

Confidence labels

High: 0Moderate: 0Low: 0

Observation window: unavailable to unavailable.

ZIP directory

Water reports in Hooper Bay

Open a ZIP for site-level provenance and measurements.

ZIP code

99604

No estimate

—

Nearest site: — mi
Confidence: —

View full ZIP evidence →

Public water systems

Utilities associated with this city

City Of Hooper Bay

PWSID AK2270312

Groundwater

System population served: 1,200
Last reported: Jun 19, 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.

Record	System	Period	Status
TTHM	AK2270312	Feb 11, 2026	Unaddressed
Revised Total Coliform Rule	AK2270312	Feb 1, 2026	Resolved
Revised Total Coliform Rule	AK2270312	Dec 1, 2025	Resolved
Chlorine	AK2270312	Dec 1, 2025	Resolved
Chlorine	AK2270312	Aug 1, 2025	Resolved
Revised Total Coliform Rule	AK2270312	Aug 1, 2025	Resolved
Chlorine	AK2270312	Jun 1, 2025	Resolved
Revised Total Coliform Rule	AK2270312	Jun 1, 2025	Resolved
Lead and Copper Rule	AK2270312	Jan 1, 2025	Unaddressed
Nitrate	AK2270312	Jan 1, 2025	Archived

Practical next steps

Move from index to evidence

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

Continue comparing

Other Alaska communities

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Kusilvak Census Area

196 PPM median

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196 PPM median

Russian Mission

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196 PPM median

Alakanuk

Kusilvak Census Area

— No median

Chevak

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— No median

Emmonak

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— No median

Search all 131 Alaska cities →

Questions people ask

About water in Hooper Bay

Is the water hard?

The index does not have a qualifying hardness estimate for this city.

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.