Hardness
Unavailable
No qualifying site within 75 miles
Local water dashboard
Official source aggregationWater quality in Shelby, MT 59474
A source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Toole County.
No active health-based violation reported
- Primary matched system
- Shelby City Of
- Source water
- Groundwater
- County
- Toole 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
0.002 mg/L
13% of action level
Utility match
5 systems
Serves 3,970 people system-wide
Hardness estimate unavailable
No responsible local estimate yet
We did not find enough qualifying recent USGS hardness observations within 75 miles of this ZIP centroid. We leave the value blank instead of substituting a state average. Ask the serving utility or test the household tap for a property-specific result.
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)
0.002 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 0.002
EPA limit 0.015
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 27
- Health-based
- 2
- Active health-based
- 0
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| Lead and Copper Rule | MT0000200 | Unaddressed | Oct 1, 2025 |
| Lead and Copper Rule | MT0005064 | Resolved | Apr 1, 2025through Jun 10, 2025 |
| Lead and Copper Rule | MT0004353 | Resolved | Dec 30, 2024through Feb 14, 2025 |
| Lead and Copper Rule | MT0000328 | Unaddressed | Oct 1, 2024 |
| Consumer Confidence Rule | MT0000587 | Resolved | Jul 1, 2024through Jul 29, 2024 |
| Consumer Confidence Rule | MT0000200 | Unaddressed | Jul 1, 2024 |
| Lead and Copper Rule | MT0005064 | Resolved | Jan 1, 2024through Feb 26, 2024 |
| Lead and Copper Rule | MT0000200 | Resolved | Oct 1, 2023through Feb 2, 2024 |
| Consumer Confidence Rule | MT0000587 | Resolved | Jul 1, 2023through Jul 13, 2023 |
| Consumer Confidence Rule | MT0000200 | Resolved | Jul 1, 2023through Jul 31, 2023 |
| Lead and Copper Rule | MT0005064 | Resolved | Sep 29, 2022through Aug 15, 2023 |
| Groundwater Rule | MT0000587 | Resolved | Sep 1, 2022through Sep 30, 2022 |
| Consumer Confidence Rule | MT0000200 | Resolved | Jul 1, 2022through Sep 28, 2022 |
| Lead and Copper Rule | MT0000200 | Resolved | Jul 1, 2022through Jul 25, 2022 |
| Lead and Copper Rule | MT0000200 | Resolved | Apr 1, 2022through Apr 4, 2022 |
| Total Haloacetic Acids (HAA5) | MT0005064 | Resolved | Jan 1, 2022through Dec 31, 2022 |
| Lead and Copper Rule | MT0005064 | Resolved | Jan 1, 2022through Jan 12, 2022 |
| Lead and Copper Rule | MT0004353 | Resolved | Dec 30, 2021through Jan 7, 2022 |
| Lead and Copper Rule | MT0005064 | Resolved | Sep 29, 2021through Oct 7, 2021 |
| Groundwater Rule | MT0005064 | Resolved | Jul 1, 2021through Jul 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 Shelby ZIP 59474 using available compliance data and 1 reported measurement benchmarks.
No urgent match
Start with an independent water test
This profile does not trigger a treatment recommendation. Test at the tap before investing in equipment.
Affiliate 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 Shelby
Is tap water safe in Shelby?+
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?+
There are not enough qualifying nearby USGS observations for a responsible hardness estimate. Ask the serving utility or test the household tap.
Do I need a water softener?+
There is no high-hardness trigger in this profile. Confirm with a tap test before buying equipment.