Riverton Water Hardness & Quality Report (2026)
Water Hardness
180+ mg/L
Very Hardestimated · not lab-verified
Source
reservoir
pH Level
8.3
neutral = 7.0
Lead
0.003 mg/L
✓ Below action level
TDS
359 mg/L
Est. Daily Cost
$0.91
energy & soap waste
Source: See methodology section below · Updated 2026
0–60
mg/L
Soft
61–120
mg/L
Moderately Hard
121–180
mg/L
Hard
180+
mg/L
Very Hard
Appliance Damage Report
In Riverton, your appliances are currently losing 45% efficiency due to mineral buildup.
| Appliance | In Riverton | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 4.7 yrs | 8.5 yrs | -45% |
| Washing Machine | 6.6 yrs | 12 yrs | -45% |
| Water Heater | 8.3 yrs | 15 yrs | -45% |
Regional Water Comparison
How Riverton compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Riverton, Wyoming | ≈ 180+ mg/L | 125.6 ppt | 🔴 Very Hard | reservoir |
| Rock Springs, Wyoming | ≈ 120–179 mg/L | 0 ppt | 🟠 Hard | reservoir |
| Green River, Wyoming | ≈ 180+ mg/L | 0 ppt | 🔴 Very Hard | reservoir |
| Casper, Wyoming | ≈ 180+ mg/L | 0 ppt | 🔴 Very Hard | reservoir |
| Sheridan, Wyoming | ≈ 120–179 mg/L | 0 ppt | 🟠 Hard | reservoir |
National Benchmark
How Riverton compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Riverton | ≈ 180+ mg/L | 🔴 High |
| USA National Avg | 151 mg/L | 🟠 Moderate |
| Scarsdale Top Rated | 0.02 mg/L | 🟢 None |
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What Makes Riverton's Water Unique?
Local geology and source profile
The City of Riverton Water Company supplies water to residents of Riverton, Wyoming, in Fremont County. This utility draws its entire water supply from groundwater sources, specifically tapping into the High Plains aquifer system. Before reaching homes and businesses, the water undergoes a treatment process at the city's dedicated water treatment facility.
The groundwater originates from Cretaceous and Tertiary sedimentary aquifers, which are characteristic of Wyoming's interior basins. These geological layers are predominantly composed of sandstone and shale formations that naturally contain a high mineral content. Consequently, these rock layers contribute substantial amounts of dissolved minerals, including calcium and magnesium, to the groundwater, resulting in a very hard water supply that mirrors the regional hydrogeological conditions of central Wyoming.
With its very hard rating, Riverton's water is known to cause significant scale buildup in appliances like kettles, coffee makers, and water heaters, necessitating frequent descaling. You'll also find that soaps and detergents aren't as effective, potentially leading to increased product use and residue on skin and hair. To combat these issues and prolong the life of appliances, homeowners and businesses often find that installing point-of-use or whole-house water softening systems makes a considerable difference, especially for laundry and dishwashing.
Geology & Source: High Plains aquifer system; Cretaceous and Tertiary sedimentary formations; sandstone and shale yield very hard water
Other Wyoming Water Reports
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Frequently Asked Questions
Is Riverton's water safe to drink?
Do I need a water softener in Riverton?
How does Riverton compare to the USA average?
Data Sources & Methodology
Water quality data for Riverton is derived from geographic and geological modelling of the surrounding region. No federal monitoring station data was available for this location.
Water Hardness
Modelled estimate based on state-level USGS geological survey data for this region. No direct USGS Water Quality Portal measurement was matched to this city — the value reflects a statistical range calibrated to the state's dominant rock types and typical source water characteristics.
pH
Estimated from regional geology and source water characteristics. pH is correlated with water hardness and local bedrock — values may differ from utility-reported figures.
TDS — Total Dissolved Solids
Estimated using a derived ratio from water hardness and regional conductance profiles. TDS in natural water correlates strongly with total mineral content including hardness ions.
PFAS — Perfluoroalkyl and Polyfluoroalkyl Substances
EPA UCMR5 (5th Unregulated Contaminant Monitoring Rule, 2023–2025) — sum of PFAS compounds detected at the public water system serving this city. A value of 0 indicates the system was sampled with no detection above reporting limits.
Lead
Modelled estimate based on the EPA Lead and Copper Rule 90th-percentile tap-sample methodology. No publicly available per-city lead dataset with sufficient national coverage exists. Values are a conservative baseline derived from city population tier and infrastructure age — all estimates are maintained below the EPA action level of 0.015 mg/L.
Appliance Lifespan
Calculated from water hardness using a linear degradation model. Baseline lifespans represent soft-water performance (kettle: 8.5 yrs, washing machine: 12.0 yrs, water heater: 15.0 yrs). Hard water mineral scale progressively reduces operational life in direct proportion to hardness concentration.