Hardness
Moderately Hard
95.6 PPM · 5.6 GPG
Local water dashboard
Official source aggregationA source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Cascade County.
At a glance
EPA quarter 2026Q2
Hardness
Moderately Hard
95.6 PPM · 5.6 GPG
Compliance screen
No active flag
0 active health-based records
Lead 90th percentile
0.007 mg/L
47% of action level
Utility match
1 system
Serves 229 people system-wide
Hardness meter
Estimated local hardness
USGS hardness classification scale
95.6 PPM
Parts per million
95.6
mg/L as CaCO₃ equivalent
Grains per gallon
5.6
1 GPG ≈ 17.1 PPM
What this means at home
At 95.6 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
11
Nearest site
13.5 mi
Observation range
May 24, 2022–Sep 10, 2025
Estimate confidence
Moderate
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: Sheep Cr ab Moose Cr, nr White Sulphur Springs, MT (Stream).USGS source documentation ↗
Regional context
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Neihart median
96 PPM
About the same1 indexed ZIP readings · Range 95.6–95.6 PPM
Montana median
122 PPM
26 PPM lower129 indexed ZIP readings · Range 0.2–799.5 PPM
EPA benchmark screen
Available numerical results from associated SDWIS community water systems, compared with the applicable action level or federal MCL. Federal measured-value coverage is incomplete.
Lead (PB90)
0.007 mg/L
Reported Dec 31, 2024
Copper (CU90)
2.3 mg/L
Reported Jun 30, 1998
Numerical coverage
2 comparable results
Missing values remain blank; absence is not treated as a pass.
Measured in mg/L
Local 0.007
EPA limit 0.015
Measured in mg/L
Local 2.3
EPA limit 1.3
100% line = listed limit
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| Revised Total Coliform Rule | MT0000298 | Resolved | Jul 1, 2024through Jul 31, 2024 |
| Revised Total Coliform Rule | MT0000298 | Resolved | Oct 1, 2021through Oct 31, 2021 |
| Consumer Confidence Rule | MT0000298 | Addressed | Jul 1, 2005 |
No reported violation does not prove that every contaminant was tested or absent; SDWIS measured values are incomplete and lag state records.
Solutions matcher
Matched to Neihart ZIP 59465 using 95.6 PPM nearby hardness and 2 reported measurement benchmarks.
Drinking water protection
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
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.
Nearby USGS observations produce an estimate of 95.6 PPM, or 5.6 grains per gallon, classified as moderately hard. This is not a household tap measurement.
There is no high-hardness trigger in this profile. Confirm with a tap test before buying equipment.