Hardness
Very Hard
412 PPM · 24.1 GPG
Local water dashboard
Official source aggregationWater quality in Sterling, CO 80751
A source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Logan County.
1 reported benchmark flag
- Primary matched system
- Sterling City Of
- Source water
- Groundwater influenced by surface water
- County
- Logan 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 mg/L
0% of action level
Utility match
1 system
Serves 15,100 people system-wide
Hardness meter
How hard is the water?
Estimated local hardness
USGS hardness classification scale
412 PPM
Soft
0–59Moderate
60–120Hard
121–180Very hard
181+
0–59Moderate
60–120Hard
121–180Very hard
181+
Parts per million
412
mg/L as CaCO₃ equivalent
Grains per gallon
24.1
1 GPG ≈ 17.1 PPM
What this means at home
At 412 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
1
Nearest site
71.4 mi
Observation range
Jan 6, 2016–Sep 7, 2023
Estimate confidence
Low
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: SOUTH PLATTE RIVER NEAR KERSEY, CO (Stream).USGS source documentation ↗
Regional context
Is 80751 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Sterling median
412 PPM
About the same1 indexed ZIP readings · Range 412–412 PPM
Colorado median
59 PPM
353 PPM higher161 indexed ZIP readings · Range 13.7–829 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 pass1 fail
Lead (PB90)
0 mg/L
Reported Dec 31, 2025
Copper (CU90)
1.6 mg/L
Reported Dec 31, 2012
Numerical coverage
2 comparable results
Missing values remain blank; absence is not treated as a pass.
Lead (90th percentile)
Measured in mg/L
Local 0
EPA limit 0.015
Copper (90th percentile)
Measured in mg/L
Local 1.6
EPA limit 1.3
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 10
- Health-based
- 0
- Active health-based
- 0
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| Turbidity | CO0138045 | Resolved | Aug 1, 2023through Aug 31, 2023 |
| E. COLI | CO0138045 | Resolved | Aug 1, 2023through Aug 31, 2023 |
| Cryptosporidium | CO0138045 | Resolved | Aug 1, 2023through Aug 31, 2023 |
| Turbidity | CO0138045 | Resolved | Jul 1, 2023through Jul 31, 2023 |
| Cryptosporidium | CO0138045 | Resolved | Jun 1, 2023through Jun 30, 2023 |
| Cryptosporidium | CO0138045 | Resolved | May 1, 2023through May 31, 2023 |
| Lead and Copper Rule | CO0138045 | Resolved | Oct 1, 2022through Nov 10, 2022 |
| Lead and Copper Rule | CO0138045 | Resolved | Jul 1, 2022through Oct 18, 2022 |
| Public Notice | CO0138045 | Resolved | Apr 5, 2021through Apr 23, 2021 |
| Public Notice | CO0138045 | Resolved | Jan 5, 2021through Jan 18, 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 Sterling ZIP 80751 using 412 PPM nearby hardness and 2 reported measurement benchmarks.
Scale protection
High-Capacity Whole House Water Softener
412 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 systemsDrinking water protection
Under-Sink Reverse Osmosis System
Copper (90th percentile) has a measured benchmark flag or active health-based SDWIS record in this profile.
A certified multi-stage RO system targets a broader range of dissolved contaminants at the kitchen tap.
Explore under-sink filtrationAffiliate 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 Sterling
Is tap water safe in Sterling?+
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 412 PPM, or 24.1 grains per gallon, classified as very hard. This is not a household tap measurement.
Do I need a water softener?+
At 412 PPM, a correctly sized whole-house softener can reduce scale and hard-water spotting. It does not replace contaminant filtration.