Hardness
Soft
34.7 PPM · 2 GPG
Local water dashboard
Official source aggregationWater quality in Kalispell, MT 59901
A source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Flathead County.
1 active health-based violation
- Primary matched system
- Kalispell Public Works
- Source water
- Groundwater
- County
- Flathead County
- Profile updated
At a glance
What the current records say
EPA quarter 2026Q2
Compliance screen
Review needed
1 active health-based record
Lead 90th percentile
0.001 mg/L
7% of action level
Utility match
10 systems
Serves 25,000 people system-wide
Hardness meter
How hard is the water?
Estimated local hardness
USGS hardness classification scale
34.7 PPM
Soft
0–59Moderate
60–120Hard
121–180Very hard
181+
0–59Moderate
60–120Hard
121–180Very hard
181+
Parts per million
34.7
mg/L as CaCO₃ equivalent
Grains per gallon
2
1 GPG ≈ 17.1 PPM
What this means at home
At 34.7 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
39.8 mi
Observation range
Jul 9, 2024–Nov 21, 2024
Estimate confidence
Low
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: 22N20W10CAAD01 (Well).USGS source documentation ↗
Regional context
Is 59901 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Kalispell median
35 PPM
About the same1 indexed ZIP readings · Range 34.7–34.7 PPM
Montana median
122 PPM
87 PPM lower129 indexed ZIP readings · Range 0.2–799.5 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)
0.001 mg/L
Reported Dec 31, 2027
Copper (CU90)
1.86 mg/L
Reported Dec 31, 2007
Numerical coverage
2 comparable results
Missing values remain blank; absence is not treated as a pass.
Lead (90th percentile)
Measured in mg/L
Local 0.001
EPA limit 0.015
Copper (90th percentile)
Measured in mg/L
Local 1.86
EPA limit 1.3
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 101
- Health-based
- 7
- Active health-based
- 1
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| Lead and Copper Rule | MT0004083 | Unaddressed | Jan 1, 2026 |
| Nitrate-NitriteHealth-basedReported 10.24 MG/L | MT0004770 | Archived | Jan 1, 2026through Mar 31, 2026 |
| Lead and Copper Rule | MT0002846 | Unaddressed | Oct 1, 2025 |
| Lead and Copper Rule | MT0004397 | Unaddressed | Oct 1, 2025 |
| Lead and Copper Rule | MT0004700 | Unaddressed | Oct 1, 2025 |
| Lead and Copper Rule | MT0001922 | Unaddressed | Oct 1, 2025 |
| Consumer Confidence Rule | MT0004270 | Resolved | Oct 1, 2025through Oct 6, 2025 |
| Consumer Confidence Rule | MT0000077 | Resolved | Oct 1, 2025through Oct 6, 2025 |
| Lead and Copper Rule | MT0004743 | Unaddressed | Oct 1, 2025 |
| Lead and Copper Rule | MT0004945 | Unaddressed | Oct 1, 2025 |
| Revised Total Coliform RuleHealth-based | MT0002516 | Unaddressed | Aug 9, 2025 |
| Consumer Confidence Rule | MT0004753 | Resolved | Jul 1, 2025through Jul 18, 2025 |
| Lead and Copper Rule | MT0005154 | Unaddressed | Jul 1, 2025 |
| Consumer Confidence Rule | MT0004083 | Resolved | Jul 1, 2025through Jul 17, 2025 |
| Consumer Confidence Rule | MT0004270 | Resolved | Jul 1, 2025through Jul 17, 2025 |
| Consumer Confidence Rule | MT0000088 | Resolved | Jul 1, 2025through Jul 28, 2025 |
| Revised Total Coliform Rule | MT0004459 | Resolved | May 1, 2025through May 31, 2025 |
| Revised Total Coliform Rule | MT0004083 | Resolved | May 1, 2025through May 31, 2025 |
| Revised Total Coliform Rule | MT0004397 | Resolved | Mar 1, 2025through Mar 31, 2025 |
| Revised Total Coliform Rule | MT0004397 | Resolved | Feb 1, 2025through Feb 28, 2025 |
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 Kalispell ZIP 59901 using 34.7 PPM nearby hardness and 2 reported measurement benchmarks.
Drinking water protection
Under-Sink Reverse Osmosis System
Copper (90th percentile), Revised Total Coliform Rule have 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 Kalispell
Is tap water safe in Kalispell?+
EPA ECHO reports 1 active health-based violation 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 34.7 PPM, or 2 grains per gallon, classified as soft. This is not a household tap measurement.
Do I need a water softener?+
There is no high-hardness trigger in this profile. Confirm with a tap test before buying equipment.