Where does the water in 99606 come from?

Water for zip code 99606 in Kokhanok, 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 99606

Q: Is the water hard in Kokhanok, AK (99606)?

The average water hardness in 99606 is 32 PPM (1.9 GPG), which is classified as soft. No water treatment is typically needed.

Q: Do I need a water softener in 99606?

At 32 PPM, your water is relatively soft. A water softener is generally not necessary, though some homeowners prefer the feel of softened water.

Kokhanok, Alaska · Lake And Peninsula Borough County

32 PPM

1.9 GPG

Soft

0Soft60120180300+

Estimated - Nearby Data

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 99606

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
Kokhanok Water & Ww System AK2263006	surface water	32 PPM Soft	160	Estimated - Nearby Data
Newhalen Water System AK2260066	groundwater	32 PPM Soft	80	Estimated - Nearby Data

Kokhanok Water & Ww System

AK2263006

Soft

32 PPMsurface water160 servedEstimated - Nearby Data

Newhalen Water System

AK2260066

Soft

32 PPMgroundwater80 servedEstimated - Nearby Data

Nearby Zip Codes

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 Kokhanok, AK (99606).

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Frequently Asked Questions

Is the water hard in Kokhanok, AK (99606)?

Our estimate for 99606 is 32 PPM (1.9 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 99606?

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

Is hard water in 99606 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 99606?

Zip code 99606 in Kokhanok, 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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