Hardness
Very Hard
186 PPM · 10.9 GPG
Local water dashboard
Official source aggregationWater quality in St. Anthony, ID 83445
A source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Fremont County.
5 active health-based violations
- Primary matched system
- Mountain View Court
- Source water
- Groundwater
- County
- Fremont County
- Profile updated
At a glance
What the current records say
EPA quarter 2026Q2
Compliance screen
Review needed
5 active health-based records
Lead 90th percentile
0 mg/L
0% of action level
Utility match
1 system
Serves 40 people system-wide
Hardness meter
How hard is the water?
Estimated local hardness
USGS hardness classification scale
186 PPM
Soft
0–59Moderate
60–120Hard
121–180Very hard
181+
0–59Moderate
60–120Hard
121–180Very hard
181+
Parts per million
186
mg/L as CaCO₃ equivalent
Grains per gallon
10.9
1 GPG ≈ 17.1 PPM
What this means at home
At 186 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
56
Nearest site
25.5 mi
Observation range
Apr 11, 2016–Jun 18, 2026
Estimate confidence
Low
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: 07N 36E 05BDD1 CNWR-WELL8 (Well).USGS source documentation ↗
Regional context
Is 83445 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
St. Anthony median
186 PPM
About the same1 indexed ZIP readings · Range 186–186 PPM
Idaho median
168 PPM
18 PPM higher78 indexed ZIP readings · Range 22.2–339 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 mg/L
Reported Dec 31, 2024
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
EPA limit 0.015
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 14
- Health-based
- 5
- Active health-based
- 5
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| Public Notice | ID7220008 | Unaddressed | May 27, 2025 |
| Public Notice | ID7220008 | Unaddressed | May 27, 2025 |
| Public Notice | ID7220008 | Unaddressed | May 27, 2025 |
| Public Notice | ID7220008 | Unaddressed | May 27, 2025 |
| Public Notice | ID7220008 | Unaddressed | May 27, 2025 |
| Groundwater RuleHealth-based | ID7220008 | Unaddressed | Mar 16, 2025 |
| Groundwater RuleHealth-based | ID7220008 | Unaddressed | Mar 16, 2025 |
| Groundwater RuleHealth-based | ID7220008 | Unaddressed | Mar 16, 2025 |
| Groundwater RuleHealth-based | ID7220008 | Unaddressed | Mar 16, 2025 |
| Groundwater RuleHealth-based | ID7220008 | Unaddressed | Mar 16, 2025 |
| E. COLI | ID7220008 | Resolved | Oct 20, 2024through Jun 27, 2025 |
| Lead and Copper Rule | ID7220008 | Unaddressed | Oct 1, 2024 |
| Groundwater Rule | ID7220008 | Resolved | Dec 28, 2022through Mar 18, 2024 |
| Revised Total Coliform Rule | ID7220008 | Resolved | Jan 1, 2021through Jan 31, 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 St. Anthony ZIP 83445 using 186 PPM nearby hardness and 1 reported measurement benchmarks.
Scale protection
High-Capacity Whole House Water Softener
186 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 systemsDrinking water protection
Under-Sink Reverse Osmosis System
Groundwater Rule 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 St. Anthony
Is tap water safe in St. Anthony?+
EPA ECHO reports 5 active health-based violations among the associated community water systems. Review the affected utility's current notice and Consumer Confidence Report.
How hard is the water?+
Nearby USGS observations produce an estimate of 186 PPM, or 10.9 grains per gallon, classified as very hard. This is not a household tap measurement.
Do I need a water softener?+
At 186 PPM, a correctly sized whole-house softener can reduce scale and hard-water spotting. It does not replace contaminant filtration.