Where does the water in 99777 come from?

Water for zip code 99777 in Tanana, Alaska is provided by 1 water system. Contact your local utility for specific source information, or check our detailed page for your area.

Water Hardness in 99777

Q: Is the water hard in Tanana, AK (99777)?

The average water hardness in 99777 is 120 PPM (7 GPG), which is classified as moderately hard. Consider a water softener or conditioner to reduce scale buildup.

Q: Do I need a water softener in 99777?

With hardness of 120 PPM, a water softener is worth considering for homes in 99777. Hard water can cause scale buildup in pipes and appliances, spotty dishes, and dry skin.

Tanana, Alaska · Yukon-Koyukuk Census Area County

120 PPM

7 GPG

Moderately Hard

0Soft60120180300+

Estimated - Nearby Data

Dataset updated March 9, 2026Matched to 1 water systemTap readings can vary by utility zone, treatment, and plumbing. Methodology

Source context

How this ZIP reading is built

This ZIP reading is built from 1 matched water system. When more than one system is matched, the displayed value is weighted toward larger known service populations when that data is available.

Source basis

1 estimated source

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 99777

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.

1 water system

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
Too'Gha Inc - In Tanana AK2360109	surface water	120 PPM Moderately Hard	271	Estimated - Nearby Data

Too'Gha Inc - In Tanana

AK2360109

Moderately Hard

120 PPMsurface water271 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 Tanana, AK (99777).

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Frequently Asked Questions

Is the water hard in Tanana, AK (99777)?

Our estimate for 99777 is 120 PPM (7 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 99777?

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

Is hard water in 99777 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 99777?

Zip code 99777 in Tanana, Alaska is served by 1 water system.