State distribution
Hardness across indexed ZIPs
Counts describe published ZIP profiles, not a population-weighted statewide sample.
Soft · 0–60 PPM2
Moderately hard · 61–120 PPM0
Hard · 121–180 PPM0
Very hard · 181+ PPM0
State water index
Alaska water hardness
Search 131 indexed communities and 149 ZIP profiles, then compare the underlying utility, source, distance, and reporting context.
Median regional evidence
52PPM
Soft
Indexed range 48.9–54.5 PPM
- ZIP profiles
- 149
- Cities
- 131
- Matched utilities
- 170
- Counties
- 25
Understanding Alaska
Why local comparisons matter here
Alaska's immense distances, isolated watersheds, permafrost regions, and remote community systems make statewide averages especially coarse. Neighboring settlements may rely on entirely different sources and infrastructure.
In this index, soft is the largest category, covering 2 of 2 profiles with hardness data. The state median is 52 PPM, but the full indexed range is 48.9–54.5 PPM.
Evidence coverage
What the current records support
- Hardness estimate
- 1%
- Lead 90th percentile
- 100%
- Copper 90th percentile
- 46%
0
Low-confidence hardness profiles
2
Research-comparison eligible profiles
Reported source water
Utility source mix
- Groundwater
- 96
- Surface water
- 61
- Groundwater influenced by surface water
- 13
Highest medians
Highest eligible city medians
Lowest medians
Lowest eligible city medians
City directory
Explore Alaska by city
Search by city or county, then sort by name, hardness, or ZIP coverage.
131 cities · 149 ZIP profiles
131 cities found
Page 1 of 6
Adak
Aleutians West Census Area · 1 ZIP
—
No regional sample1 active record
Akiachak
Bethel Census Area · 1 ZIP
—
No regional sampleNo active flag
Akiak
Bethel Census Area · 1 ZIP
—
No regional sampleNo active flag
Akutan
Aleutians East Borough · 1 ZIP
—
No regional sampleNo active flag
Alakanuk
Kusilvak Census Area · 1 ZIP
—
No regional sampleNo active flag
Ambler
Northwest Arctic Borough · 1 ZIP
—
No regional sampleNo active flag
Anaktuvuk Pass
North Slope Borough · 1 ZIP
—
No regional sampleNo active flag
Anchor Point
Kenai Peninsula Borough · 1 ZIP
—
No regional sampleNo active flag
Anchorage
Anchorage Municipality · 18 ZIPs
—
No regional sampleNo active flag
Angoon
Hoonah-Angoon Census Area · 1 ZIP
—
No regional sampleNo active flag
Anvik
Yukon-Koyukuk Census Area · 1 ZIP
—
No regional sample2 active records
Beaver
Yukon-Koyukuk Census Area · 1 ZIP
—
No regional sampleNo active flag
Bethel
Bethel Census Area · 1 ZIP
—
No regional sampleNo active flag
Big Lake
Matanuska-Susitna Borough · 1 ZIP
—
No regional sampleNo active flag
Brevig Mission
Nome Census Area · 1 ZIP
—
No regional sampleNo active flag
Buckland
Northwest Arctic Borough · 1 ZIP
—
No regional sampleNo active flag
Chalkyitsik
Yukon-Koyukuk Census Area · 1 ZIP
—
No regional sampleNo active flag
Chefornak
Bethel Census Area · 1 ZIP
—
No regional sampleNo active flag
Chevak
Kusilvak Census Area · 1 ZIP
—
No regional sampleNo active flag
Chignik Lagoon
Lake And Peninsula Borough · 1 ZIP
—
No regional sampleNo active flag
Chignik Lake
Lake And Peninsula Borough · 1 ZIP
—
No regional sampleNo active flag
Circle
Yukon-Koyukuk Census Area · 1 ZIP
—
No regional sampleNo active flag
Coffman Cove
Prince Of Wales-Hyder Census Area · 1 ZIP
—
No regional sampleNo active flag
Cold Bay
Aleutians East Borough · 1 ZIP
—
No regional sampleNo active flag
County comparison
Highest regional-evidence county medians
| County | Median | Range | ZIP profiles |
|---|---|---|---|
| North Slope Borough | 52 PPM | 48.9–54.5 | 4 |
| Anchorage Municipality | — PPM | —–— | 17 |
| Bethel Census Area | — PPM | —–— | 23 |
| Aleutians West Census Area | — PPM | —–— | 4 |
| Lake And Peninsula Borough | — PPM | —–— | 6 |
| Kodiak Island Borough | — PPM | —–— | 5 |
| Aleutians East Borough | — PPM | —–— | 5 |
| Kusilvak Census Area | — PPM | —–— | 10 |
| Kenai Peninsula Borough | — PPM | —–— | 4 |
| Yukon-Koyukuk Census Area | — PPM | —–— | 22 |
| Chugach Census Area | — PPM | —–— | 4 |
| Dillingham Census Area | — PPM | —–— | 4 |