Hardness
Very Hard
248 PPM · 14.5 GPG
Local water dashboard
Official source aggregationWater quality in Rock Springs, WY 82901
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
- Rock Springs, 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
0.003 mg/L
20% of action level
Utility match
10 systems
Serves 24,000 people system-wide
Hardness meter
How hard is the water?
Estimated local hardness
USGS hardness classification scale
248 PPM
Soft
0–59Moderate
60–120Hard
121–180Very hard
181+
0–59Moderate
60–120Hard
121–180Very hard
181+
Parts per million
248
mg/L as CaCO₃ equivalent
Grains per gallon
14.5
1 GPG ≈ 17.1 PPM
What this means at home
At 248 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
12
Nearest site
22.9 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: BITTER CREEK NEAR POINT OF ROCKS, WY (Stream).USGS source documentation ↗
Regional context
Is 82901 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Rock Springs median
248 PPM
About the same1 indexed ZIP readings · Range 248–248 PPM
Wyoming median
235 PPM
13 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)
0.003 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 0.003
EPA limit 0.015
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 14
- Health-based
- 1
- Active health-based
- 0
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| Lead and Copper Rule | WY5601175 | Unaddressed | Dec 30, 2024 |
| Lead and Copper Rule | WY5601176 | Resolved | Oct 1, 2023through Dec 5, 2024 |
| Lead and Copper Rule | WY5601085 | Resolved | Oct 1, 2023through Nov 21, 2025 |
| Lead and Copper Rule | WY5600088 | Resolved | Oct 1, 2023through Dec 4, 2024 |
| Long Term 2 Enhanced Surface Water Treatment RuleHealth-based | WY5601176 | Resolved | Sep 3, 2023through Jan 29, 2024 |
| TTHM | WY5601176 | Resolved | Jan 1, 2023through Mar 31, 2023 |
| Lead and Copper Rule | WY5600091 | Resolved | Dec 30, 2022through Jan 17, 2023 |
| Lead and Copper Rule | WY5601085 | Resolved | Dec 30, 2022through Feb 3, 2023 |
| Lead and Copper Rule | WY5601175 | Resolved | Oct 1, 2022through Feb 22, 2024 |
| TTHM | WY5601176 | Resolved | Mar 1, 2022through May 31, 2022 |
| Lead and Copper Rule | WY5601085 | Resolved | Oct 1, 2021through Feb 8, 2022 |
| Consumer Confidence Rule | WY5600091 | Unaddressed | Jul 1, 2013 |
| Consumer Confidence Rule | WY5601175 | Addressed | Jul 1, 2013 |
| Consumer Confidence Rule | WY5600091 | Addressed | Oct 1, 2007 |
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 Rock Springs ZIP 82901 using 248 PPM nearby hardness and 1 reported measurement benchmarks.
Scale protection
High-Capacity Whole House Water Softener
248 PPM is 2× 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 Rock Springs
Is tap water safe in Rock Springs?+
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 248 PPM, or 14.5 grains per gallon, classified as very hard. This is not a household tap measurement.
Do I need a water softener?+
At 248 PPM, a correctly sized whole-house softener can reduce scale and hard-water spotting. It does not replace contaminant filtration.