Where does the water in 99634 come from?

Water for zip code 99634 in Napakiak, Alaska is provided by 2 water systems. Contact your local utility for specific source information, or check our detailed page for your area.

Water Hardness in 99634

Q: Is the water hard in Napakiak, AK (99634)?

The average water hardness in 99634 is 58 PPM (3.4 GPG), which is classified as soft. No water treatment is typically needed.

Q: Do I need a water softener in 99634?

At 58 PPM, your water is relatively soft. A water softener is generally not necessary, though some homeowners prefer the feel of softened water.

Napakiak, Alaska · Bethel Census Area County

58 PPM

3.4 GPG

Soft

0Soft60120180300+

Estimated - County Avg

Dataset updated March 9, 2026Matched to 2 water systemsTap readings can vary by utility zone, treatment, and plumbing. Methodology

Source context

How this ZIP reading is built

This ZIP reading is built from 2 matched water systems. When more than one system is matched, the displayed value is weighted toward larger known service populations when that data is available.

Source basis

2 estimated sources

This ZIP reading needs local confirmation before equipment sizing or purchase decisions.

Water source profile

Primarily surface water

Surface-water hardness can shift with reservoirs, runoff, season, and treatment. This profile is weighted by known population served across matched systems.

Data recency

March 9, 2026

Dataset rebuilt March 9, 2026; individual utility reporting years can vary.

Hardness is a mineral-content reading, not a drinking-water safety rating. Use it for scale, appliance, and softener decisions; check your utility report or test your tap before sizing treatment equipment. See how we calculate local readings.

Water Systems Serving 99634

These are the systems matched to this ZIP code. The displayed ZIP value is weighted toward larger known service populations when population data is available.

2 water systems

PWSID is the public water system identifier. Data Source shows whether the hardness value comes from a treated-water report, USGS monitoring, or a local estimate; source year is shown when available.

Water System	Source	Hardness	Pop. Served	Data Source
Kongiganak Water System AK2271025	surface water	58 PPM Soft	547	Estimated - County Avg
Napakiak Washeteria AK2262301	groundwater	58 PPM Soft	336	Estimated - County Avg

Kongiganak Water System

AK2271025

Soft

58 PPMsurface water547 servedEstimated - County Avg

Napakiak Washeteria

AK2262301

Soft

58 PPMgroundwater336 servedEstimated - County Avg

Nearby Zip Codes

9955962 9964189

What This Means For You

Use this ZIP reading as a local planning estimate, not a final treatment specification. Hardness can vary by utility zone, seasonal blend, private well, and building plumbing. Confirm your tap reading with a utility report or home hardness test before sizing equipment.

Methodology Data sources How to test your water

Know your water hardness?

If you've tested your water or have your utility's CCR report, share your reading to help us improve accuracy for Napakiak, AK (99634).

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Frequently Asked Questions

Is the water hard in Napakiak, AK (99634)?

Our estimate for 99634 is 58 PPM (3.4 GPG), but it is based on nearby, county, or state-level data rather than a direct treated tap-water report for this exact location. Confirm with your utility or a home test.

Do I need a water softener in 99634?

Do not size a softener from this estimate alone. Confirm the actual tap-water hardness before choosing treatment equipment.

Is hard water in 99634 safe to drink?

Water hardness itself is a mineral-content reading, not a drinking-water safety rating. Calcium and magnesium are naturally occurring minerals, but you should check your utility's Consumer Confidence Report for contaminant and compliance information.

How many water systems serve 99634?

Zip code 99634 in Napakiak, Alaska is served by 2 water systems.

Learn More About Your Water

Water Hardness Scale: PPM and GPG Chart

Use the USGS water hardness scale to compare PPM, GPG, and mg/L levels from soft to very hard water.

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How to Test Water Hardness at Home

Compare free lookups, soap tests, test strips, liquid drop kits, and lab tests for measuring water hardness.

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