Hardness
Hard
123 PPM · 7.2 GPG
Local water dashboard
Official source aggregationWater quality in Moscow, ID 83843
A source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Latah County.
No active health-based violation reported
- Primary matched system
- Moscow Water Dept
- Source water
- Groundwater
- County
- Latah 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 26,000 people system-wide
Hardness meter
How hard is the water?
Estimated local hardness
USGS hardness classification scale
123 PPM
Soft
0–59Moderate
60–120Hard
121–180Very hard
181+
0–59Moderate
60–120Hard
121–180Very hard
181+
Parts per million
123
mg/L as CaCO₃ equivalent
Grains per gallon
7.2
1 GPG ≈ 17.1 PPM
What this means at home
At 123 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
22
Nearest site
3.7 mi
Observation range
Jul 27, 2016–Aug 7, 2024
Estimate confidence
Moderate
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: 39N 05W 07BDA2 (Well).USGS source documentation ↗
Regional context
Is 83843 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Moscow median
128 PPM
5 PPM lower2 indexed ZIP readings · Range 123–132 PPM
Idaho median
168 PPM
45 PPM lower78 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, 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 0.004
EPA limit 0.015
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 23
- Health-based
- 0
- Active health-based
- 0
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| TTHM | ID2290023 | Resolved | Jan 1, 2025through Nov 25, 2025 |
| Total Haloacetic Acids (HAA5) | ID2290023 | Resolved | Jan 1, 2025through Nov 25, 2025 |
| 1,2,4-Trichlorobenzene | ID2290023 | Resolved | Jul 1, 2021through Sep 30, 2021 |
| cis-1,2-Dichloroethylene | ID2290023 | Resolved | Jul 1, 2021through Sep 30, 2021 |
| p-Dichlorobenzene | ID2290023 | Resolved | Jul 1, 2021through Sep 30, 2021 |
| 1,2-Dichloroethane | ID2290023 | Resolved | Jul 1, 2021through Sep 30, 2021 |
| 1,1,1-Trichloroethane | ID2290023 | Resolved | Jul 1, 2021through Sep 30, 2021 |
| 1,2-Dichloropropane | ID2290023 | Resolved | Jul 1, 2021through Sep 30, 2021 |
| Trichloroethylene | ID2290023 | Resolved | Jul 1, 2021through Sep 30, 2021 |
| 1,1,2-Trichloroethane | ID2290023 | Resolved | Jul 1, 2021through Sep 30, 2021 |
| Tetrachloroethylene | ID2290023 | Resolved | Jul 1, 2021through Sep 30, 2021 |
| CHLOROBENZENE | ID2290023 | Resolved | Jul 1, 2021through Sep 30, 2021 |
| Toluene | ID2290023 | Resolved | Jul 1, 2021through Sep 30, 2021 |
| Styrene | ID2290023 | Resolved | Jul 1, 2021through Sep 30, 2021 |
| DICHLOROMETHANE | ID2290023 | Resolved | Jul 1, 2021through Sep 30, 2021 |
| 1,1-Dichloroethylene | ID2290023 | Resolved | Jul 1, 2021through Sep 30, 2021 |
| Xylenes, Total | ID2290023 | Resolved | Jul 1, 2021through Sep 30, 2021 |
| Vinyl chloride | ID2290023 | Resolved | Jul 1, 2021through Sep 30, 2021 |
| trans-1,2-Dichloroethylene | ID2290023 | Resolved | Jul 1, 2021through Sep 30, 2021 |
| Benzene | ID2290023 | Resolved | Jul 1, 2021through Sep 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 Moscow ZIP 83843 using 123 PPM nearby hardness and 1 reported measurement benchmarks.
Scale protection
High-Capacity Whole House Water Softener
123 PPM is 1× 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 Moscow
Estimates can differ across a city because monitoring locations and associated systems differ.
Frequently asked
Water questions for Moscow
Is tap water safe in Moscow?+
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 123 PPM, or 7.2 grains per gallon, classified as hard. This is not a household tap measurement.
Do I need a water softener?+
At 123 PPM, a correctly sized whole-house softener can reduce scale and hard-water spotting. It does not replace contaminant filtration.