Hardness
Very Hard
386.5 PPM · 22.6 GPG
Local water dashboard
Official source aggregationWater quality in Green River, WY 82935
A source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Sweetwater County.
No active health-based violation reported
- Primary matched system
- Green River, City Of
- Source water
- Surface water
- County
- Sweetwater County
- Profile updated
At a glance
What the current records say
EPA quarter 2026Q2
Compliance screen
No active flag
0 active health-based records
Lead 90th percentile
0.002 mg/L
13% of action level
Utility match
6 systems
Serves 10,500 people system-wide
Hardness meter
How hard is the water?
Estimated local hardness
USGS hardness classification scale
386.5 PPM
Soft
0–59Moderate
60–120Hard
121–180Very hard
181+
0–59Moderate
60–120Hard
121–180Very hard
181+
Parts per million
386.5
mg/L as CaCO₃ equivalent
Grains per gallon
22.6
1 GPG ≈ 17.1 PPM
What this means at home
At 386.5 PPM, mineral scale can build up on fixtures and heating elements, reduce soap lather, and leave visible spotting. Hardness is primarily an aesthetic and appliance concern—not itself a tap-water safety rating.
USGS sites used
8
Nearest site
15.6 mi
Observation range
Jan 5, 2016–Jun 10, 2026
Estimate confidence
Moderate
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: GREEN RIVER NEAR GREEN RIVER, WY (Stream).USGS source documentation ↗
Regional context
Is 82935 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Green River median
387 PPM
About the same1 indexed ZIP readings · Range 386.5–386.5 PPM
Wyoming median
235 PPM
152 PPM higher93 indexed ZIP readings · Range 3.2–1905 PPM
EPA benchmark screen
Contaminant snapshot
Available numerical results from associated SDWIS community water systems, compared with the applicable action level or federal MCL. Federal measured-value coverage is incomplete.
1 pass
Lead (PB90)
0.002 mg/L
Reported Dec 31, 2025
Copper (CU90)
Not available
No numerical 90th-percentile result
Numerical coverage
1 comparable result
Missing values remain blank; absence is not treated as a pass.
Lead (90th percentile)
Measured in mg/L
Local 0.002
EPA limit 0.015
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 13
- Health-based
- 0
- Active health-based
- 0
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| Surface Water Treatment Rule | WY5601213 | Resolved | May 1, 2025through May 31, 2025 |
| Revised Total Coliform Rule | WY5601213 | Resolved | May 1, 2025through May 31, 2025 |
| Lead and Copper Rule | WY5601213 | Resolved | Jan 1, 2025through Aug 7, 2025 |
| Revised Total Coliform Rule | WY5601213 | Resolved | Aug 1, 2024through Aug 31, 2024 |
| Revised Total Coliform Rule | WY5601608 | Resolved | Feb 1, 2023through Feb 28, 2023 |
| Surface Water Treatment Rule | WY5601608 | Resolved | Feb 1, 2023through Feb 28, 2023 |
| Surface Water Treatment Rule | WY5601173 | Resolved | Dec 1, 2022through Dec 31, 2022 |
| Revised Total Coliform Rule | WY5601173 | Resolved | Dec 1, 2022through Dec 31, 2022 |
| Lead and Copper Rule | WY5601608 | Resolved | Oct 1, 2022through Dec 12, 2023 |
| TTHM | WY5601181 | Resolved | Mar 1, 2022through May 31, 2022 |
| Total Haloacetic Acids (HAA5) | WY5601181 | Resolved | Mar 1, 2022through May 31, 2022 |
| Lead and Copper Rule | WY5601608 | Resolved | Oct 1, 2021through Dec 12, 2023 |
| Revised Total Coliform Rule | WY5601608 | Resolved | Apr 1, 2021through Apr 30, 2021 |
No reported violation does not prove that every contaminant was tested or absent; SDWIS measured values are incomplete and lag state records.
Solutions matcher
Your personalized water action plan
Matched to Green River ZIP 82935 using 386.5 PPM nearby hardness and 1 reported measurement benchmarks.
Scale protection
High-Capacity Whole House Water Softener
386.5 PPM is 3× the high-hardness trigger used by this matcher.
Designed to reduce scale on fixtures, water heaters, glassware, and plumbing throughout the home.
Compare whole-house systemsAffiliate disclosure: we may earn a commission from qualifying purchases, at no added cost to you. Product matching is educational and does not replace certified water testing.
Frequently asked
Water questions for Green River
Is tap water safe in Green River?+
EPA ECHO shows no active health-based violation for the associated systems in this reporting snapshot. This does not prove every contaminant is absent; federal records can lag and household plumbing can change tap conditions.
How hard is the water?+
Nearby USGS observations produce an estimate of 386.5 PPM, or 22.6 grains per gallon, classified as very hard. This is not a household tap measurement.
Do I need a water softener?+
At 386.5 PPM, a correctly sized whole-house softener can reduce scale and hard-water spotting. It does not replace contaminant filtration.