State distribution
Hardness across indexed ZIPs
Counts describe published ZIP profiles, not a population-weighted statewide sample.
Soft · 0–60 PPM6
Moderately hard · 61–120 PPM1
Hard · 121–180 PPM8
Very hard · 181+ PPM27
State water index
Wyoming water hardness
Search 90 indexed communities and 97 ZIP profiles, then compare the underlying utility, source, distance, and reporting context.
Median regional evidence
209PPM
Very Hard
Indexed range 2–2970 PPM
- ZIP profiles
- 97
- Cities
- 90
- Matched utilities
- 196
- Counties
- 24
Understanding Wyoming
Why local comparisons matter here
Wyoming combines mountain headwaters with broad intermontane basins and sedimentary aquifers. Small systems can be far from the nearest qualifying monitoring site.
In this index, very hard is the largest category, covering 27 of 42 profiles with hardness data. The state median is 209 PPM, but the full indexed range is 2–2970 PPM.
Evidence coverage
What the current records support
- Hardness estimate
- 43%
- Lead 90th percentile
- 100%
- Copper 90th percentile
- 19%
33
Low-confidence hardness profiles
3
Research-comparison eligible profiles
Reported source water
Utility source mix
- Groundwater
- 111
- Surface water
- 80
- Groundwater influenced by surface water
- 5
Highest medians
Highest eligible city medians
Lowest medians
Lowest eligible city medians
City directory
Explore Wyoming by city
Search by city or county, then sort by name, hardness, or ZIP coverage.
90 cities · 97 ZIP profiles
90 cities found
Page 1 of 4
Afton
Lincoln County · 1 ZIP
—
No regional sample1 active record
Albin
Laramie County · 1 ZIP
—
No regional sample2 active records
Alta
Teton County · 1 ZIP
134PPM regional
Single regional valueNo active flag
Baggs
Carbon County · 1 ZIP
—
No regional sampleNo active flag
Bairoil
Sweetwater County · 1 ZIP
—
No regional sampleNo active flag
Basin
Big Horn County · 1 ZIP
—
No regional sampleNo active flag
Beulah
Crook County · 1 ZIP
—
No regional sample2 active records
Buffalo
Johnson County · 1 ZIP
184PPM regional
Single regional valueNo active flag
Burlington
Big Horn County · 1 ZIP
—
No regional sampleNo active flag
Burns
Laramie County · 1 ZIP
—
No regional sampleNo active flag
Byron
Big Horn County · 1 ZIP
207PPM regional
Single regional valueNo active flag
Carpenter
Laramie County · 1 ZIP
—
No regional sampleNo active flag
Casper
Natrona County · 2 ZIPs
221PPM regional
Regional range 170–272No active flag
Centennial
Albany County · 1 ZIP
—
No regional sampleNo active flag
Cheyenne
Laramie County · 2 ZIPs
—
No regional sampleNo active flag
Chugwater
Platte County · 1 ZIP
—
No regional sampleNo active flag
Clearmont
Sheridan County · 1 ZIP
—
No regional sampleNo active flag
Cody
Park County · 1 ZIP
29PPM regional
Single regional valueNo active flag
Cowley
Big Horn County · 1 ZIP
—
No regional sampleNo active flag
Dayton
Sheridan County · 1 ZIP
—
No regional sampleNo active flag
Deaver
Big Horn County · 1 ZIP
207PPM regional
Single regional valueNo active flag
Dixon
Carbon County · 1 ZIP
—
No regional sampleNo active flag
Douglas
Converse County · 1 ZIP
—
No regional sampleNo active flag
Dubois
Fremont County · 1 ZIP
—
No regional sampleNo active flag
County comparison
Highest regional-evidence county medians
| County | Median | Range | ZIP profiles |
|---|---|---|---|
| Fremont County | 2970 PPM | 2970–2970 | 4 |
| Crook County | 1561 PPM | 1561–1561 | 4 |
| Bonneville County | 914 PPM | 913.5–913.5 | 1 |
| Johnson County | 449 PPM | 184–713 | 2 |
| Natrona County | 272 PPM | 170–683 | 6 |
| Weston County | 261 PPM | 260.5–260.5 | 3 |
| Sheridan County | 229 PPM | 229–229 | 4 |
| Big Horn County | 218 PPM | 207–243.5 | 11 |
| Campbell County | 215 PPM | 160–336.5 | 3 |
| Lincoln County | 204 PPM | 2–210 | 10 |
| Sweetwater County | 183 PPM | 9.5–1575 | 9 |
| Carbon County | 146 PPM | 5.2–176 | 9 |