Hardness
Very Hard
212 PPM · 12.4 GPG
Local water dashboard
Official source aggregationWater quality in Sun Valley, ID 83354
A source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Blaine County.
No active health-based violation reported
- Primary matched system
- Sun Valley Water And Sewer Dist
- Source water
- Groundwater
- County
- Blaine 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
0.004 mg/L
27% of action level
Utility match
1 system
Serves 3,400 people system-wide
Hardness meter
How hard is the water?
Estimated local hardness
USGS hardness classification scale
212 PPM
Soft
0–59Moderate
60–120Hard
121–180Very hard
181+
0–59Moderate
60–120Hard
121–180Very hard
181+
Parts per million
212
mg/L as CaCO₃ equivalent
Grains per gallon
12.4
1 GPG ≈ 17.1 PPM
What this means at home
At 212 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
108
Nearest site
54.9 mi
Observation range
May 16, 2016–Jun 18, 2026
Estimate confidence
Low
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: 05N 27E 34ACA1 King Spring nr Arco, ID (Spring).USGS source documentation ↗
Regional context
Is 83354 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Sun Valley median
210 PPM
About the same2 indexed ZIP readings · Range 207.5–212 PPM
Idaho median
168 PPM
44 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)
0.004 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 0.004
EPA limit 0.015
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 25
- Health-based
- 0
- Active health-based
- 0
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| LEAD AND COPPER RULE REVISIONS | ID5070051 | Unaddressed | Jul 2, 2025 |
| Total Haloacetic Acids (HAA5) | ID5070051 | Archived | Jan 1, 2025through Dec 31, 2025 |
| TTHM | ID5070051 | Archived | Jan 1, 2025through Dec 31, 2025 |
| Radium-226 | ID5070051 | Resolved | Jan 1, 2024through Mar 31, 2024 |
| Combined Uranium | ID5070051 | Resolved | Jan 1, 2024through Mar 31, 2024 |
| Gross Alpha, Excl. Radon and U | ID5070051 | Resolved | Jan 1, 2024through Mar 31, 2024 |
| Radium-228 | ID5070051 | Resolved | Jan 1, 2024through Mar 31, 2024 |
| Radium-226 | ID5070051 | Resolved | Jul 1, 2023through Sep 30, 2023 |
| Radium-228 | ID5070051 | Resolved | Jul 1, 2023through Sep 30, 2023 |
| Combined Uranium | ID5070051 | Resolved | Jul 1, 2023through Sep 30, 2023 |
| Gross Alpha, Excl. Radon and U | ID5070051 | Resolved | Jul 1, 2023through Sep 30, 2023 |
| Lead and Copper Rule | ID5070051 | Resolved | Dec 30, 2022through Dec 11, 2024 |
| Gross Alpha, Excl. Radon and U | ID5070051 | Resolved | Apr 1, 2022through Jun 30, 2022 |
| Radium-228 | ID5070051 | Resolved | Apr 1, 2022through Jun 30, 2022 |
| Radium-226 | ID5070051 | Resolved | Apr 1, 2022through Jun 30, 2022 |
| Combined Uranium | ID5070051 | Resolved | Apr 1, 2022through Jun 30, 2022 |
| Radium-228 | ID5070051 | Resolved | Jan 1, 2022through Mar 31, 2022 |
| Combined Uranium | ID5070051 | Resolved | Jan 1, 2022through Mar 31, 2022 |
| Gross Alpha, Excl. Radon and U | ID5070051 | Resolved | Jan 1, 2022through Mar 31, 2022 |
| Radium-226 | ID5070051 | Resolved | Jan 1, 2022through Mar 31, 2022 |
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 Sun Valley ZIP 83354 using 212 PPM nearby hardness and 1 reported measurement benchmarks.
Scale protection
High-Capacity Whole House Water Softener
212 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.
Nearby indexed reports
Compare ZIPs in Sun Valley
Estimates can differ across a city because monitoring locations and associated systems differ.
Frequently asked
Water questions for Sun Valley
Is tap water safe in Sun Valley?+
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 212 PPM, or 12.4 grains per gallon, classified as very hard. This is not a household tap measurement.
Do I need a water softener?+
At 212 PPM, a correctly sized whole-house softener can reduce scale and hard-water spotting. It does not replace contaminant filtration.