Water hardness by state
How hard is the water in Alaska?
Tap water in Alaska averages 4.2 grains per gallon (72 ppm calcium carbonate). That number determines how fast limescale coats your water heater, shower glass and appliances.
Auf Basis von 319 Messungen an 45 Messstellen, 2018-01 → 2023-10.
Wasserhärte nach Bezirk — Alaska
Mediane der in jedem Bezirk erfassten Messungen. Die Härte schwankt innerhalb eines Bundesstaats deutlich stärker als zwischen Nachbarstaaten — daher stammt Ihr tatsächlicher Wert.
| Bezirk | gpg | mg/L | Bereich (mg/L) | Einstufung |
|---|---|---|---|---|
| Ketchikan Gateway Borough | 3.2 | 55 | 37–94 | Soft water |
| Wade Hampton Census Area | 8.1 | 138 | 95–180 | Soft water |
| City and Borough of Juneau | 4.4 | 75 | 54–126 | Soft water |
| Matanuska-Susitna Borough | 3.4 | 58 | 40–82 | Soft water |
| Prince of Wales-Hyder Census Area | 2.3 | 39 | 25–67 | Soft water |
| City and Borough of Wrangell | 3.5 | 60 | 52–92 | Soft water |
| North Slope Borough | 10.5 | 180 | 41–262 | Moderately hard water |
| City and Borough of Yakutat | 4.2 | 72 | 62–86 | Soft water |
| Valdez-Cordova Census Area | 3.6 | 62 | 50–74 | Soft water |
| Haines Borough | 8.6 | 147 | 79–152 | Soft water |
Der Bereich entspricht dem 10.-90. Perzentil der lokalen Messungen. Bezirke mit weniger als fünf Messungen werden ausgelassen statt geschätzt.
What 4.2 gpg means in Alaska
Soft water like this leaves little to no scale. Soap lathers easily, appliances stay clean and your water heater keeps its efficiency. Protection is optional — mostly useful if your utility occasionally blends in harder sources.
What it does to your home
Water heater: even a thin layer of scale insulates the heating element and drives energy use up.
Appliances: dishwashers, washing machines and coffee makers scale up and fail years early.
Fixtures and skin: white spots on faucets and glass, dry skin and dull hair after every shower.
Wie dieser Wert ermittelt wurde
Median of the site-level medians at 45 ambient monitoring sites in the USGS National Water Information System (319 individual measurements, 2018-01 → 2023-10). Each site is collapsed to one value first so that a heavily sampled location cannot skew the state figure; the range shown is the 10th-90th percentile across sites. This describes the raw water resource, not a specific municipal tap after treatment.
Water Quality Portal — USGS National Water Information System (NWIS), characteristic "Hardness, Ca, Mg"Statewide average — hardness varies by utility and season. Always verify with your local water quality report.
Frequently asked questions — Alaska
Is 4.2 gpg considered hard water?
On the US scale, 0–3.5 gpg is soft, 3.5–7 gpg moderately hard, 7–10.5 gpg hard and above 10.5 gpg very hard. At 4.2 gpg (72 ppm), water in Alaska is classified as Soft water.
Does Alaska have a limescale problem?
Water in Alaska averages 4.2 gpg — Soft water. The harder the water, the faster calcium carbonate deposits build up in water heaters, appliances and pipes. Below 3.5 gpg the risk is minimal; above 7 gpg scale becomes a running cost.
How do I find the exact water hardness at my address in Alaska?
Check your utility's annual water quality report (Consumer Confidence Report) or your water bill, or use our free interactive hardness map. Hardness can vary widely between neighboring utilities in Alaska.
Do I need a salt-based water softener at 4.2 gpg?
Not necessarily. Salt softeners add sodium to your water and need constant refills. LIMPEO treats limescale with an electromagnetic field — no salt, no chemicals, no maintenance — and keeps healthy minerals in your drinking water.