Utility-reported hardness
Unavailable
Ask your provider or test your tap
Local water dashboard
Official source aggregationWater quality in Lolo, MT 59847
Regional hardness evidence, possible serving systems, EPA compliance history, and the measurements that are—and are not—available for Missoula County.
No active health-based violation reported
- Largest possible serving system
- Lolo Water And Sewer Dist
- Source water
- Groundwater
- County
- Missoula County
- Profile updated
Your tap water
What does the utility report?
Match the utility name to your water bill. These results describe the utility’s water, not a test at your home. A ZIP can include several water systems.
Utility hardness unavailable in this index
Nearby river or groundwater samples cannot tell us the hardness coming out of your tap. Ask your water provider for total hardness as CaCO₃, or test it at home.
Find an official utility report →At a glance
What the current records say
EPA quarter 2026Q2
All possible systems
No active flag
0 active health-based records
Measurements by utility
Each result belongs to a specific system.
Utility match
6 systems
Serves 3,315 people system-wide
Match the name on your water bill
Your utility’s measurements and compliance records
These are possible serving systems. A record for one system does not apply to every home in this ZIP. Confirm your provider before interpreting a measurement or notice. Federal records can lag current utility notices.
EPA snapshot: 2026Q2. Historical window begins Jan 1, 2021.
Lolo Water And Sewer Dist
MT0000278 · Groundwater · 3,315 people served system-wide
The system names this served city; Census place overlap links the city to this ZCTA.
No active health-based record in this imported snapshot
Find this utility’s official report →Measurements (1)
An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.
Lead (90th percentile)
EPA SDWIS Lead and Copper Rule samples
- Reported level
- 0.001 mg/L
- Action level
- 0.015 mg/L
7% of the listed benchmark
Monitoring period: Jan 1, 2022 to Dec 31, 2024
Violation history (2)
| Rule | Status | Period |
|---|---|---|
| Nitrate-Nitrite | Resolved | Jan 1, 2024 to Dec 31, 2024 |
| Consumer Confidence Rule | Resolved | Jul 1, 2022 to Aug 1, 2022 |
Shelby Addition Water District
MT0002800 · Groundwater · 145 people served system-wide
The system names this served city; Census place overlap links the city to this ZCTA.
No active health-based record in this imported snapshot
Find this utility’s official report →Measurements (1)
An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.
Lead (90th percentile)
EPA SDWIS Lead and Copper Rule samples
- Reported level
- 0.001 mg/L
- Action level
- 0.015 mg/L
7% of the listed benchmark
Monitoring period: Jan 1, 2023 to Dec 31, 2025
Violation history (0)
No record returned in this imported window. This is not a guarantee of tap-water safety.
Bitterroot Gateway Mb Pk Lolo
MT0000443 · Groundwater · 130 people served system-wide
The system names this served city; Census place overlap links the city to this ZCTA.
No active health-based record in this imported snapshot
Find this utility’s official report →Measurements (1)
An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.
Lead (90th percentile)
EPA SDWIS Lead and Copper Rule samples
- Reported level
- 0 mg/L
- Action level
- 0.015 mg/L
0% of the listed benchmark
Monitoring period: Jan 1, 2018 to Dec 31, 2020
Violation history (110)
| Rule | Status | Period |
|---|---|---|
| Lead and Copper Rule | Resolved | Oct 1, 2024 to Jul 17, 2025 |
| Cadmium | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Chromium | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Mercury | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Nickel | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Antimony, Total | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Barium | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Cadmium | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Fluoride | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Nickel | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Antimony, Total | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Beryllium, Total | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Thallium, Total | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Endrin | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| BHC-GAMMA | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Methoxychlor | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Toxaphene | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Dalapon | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Di(2-ethylhexyl) adipate | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Simazine | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Carbofuran | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Atrazine | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Heptachlor | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| HEXACHLOROBENZENE | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Benzo(a)pyrene | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Endrin | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| BHC-GAMMA | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Methoxychlor | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Toxaphene | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Dalapon | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Di(2-ethylhexyl) adipate | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Dinoseb | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Hexachlorocyclopentadiene | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Carbofuran | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Atrazine | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Heptachlor | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| 2,4-D | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| 2,4,5-TP | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| HEXACHLOROBENZENE | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Benzo(a)pyrene | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Pentachlorophenol | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Chlordane | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| 1,2,4-Trichlorobenzene | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| cis-1,2-Dichloroethylene | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Xylenes, Total | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| DICHLOROMETHANE | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| o-Dichlorobenzene | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| p-Dichlorobenzene | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Vinyl chloride | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| 1,1-Dichloroethylene | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| trans-1,2-Dichloroethylene | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| 1,2-Dichloroethane | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| 1,1,1-Trichloroethane | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Carbon tetrachloride | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| 1,2-Dichloropropane | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Trichloroethylene | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| 1,1,2-Trichloroethane | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| CHLOROBENZENE | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Benzene | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Toluene | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Ethylbenzene | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Xylenes, Total | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| DICHLOROMETHANE | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| o-Dichlorobenzene | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Vinyl chloride | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| p-Dichlorobenzene | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| 1,1-Dichloroethylene | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| trans-1,2-Dichloroethylene | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Carbon tetrachloride | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| 1,2-Dichloropropane | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| 1,1,2-Trichloroethane | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Benzene | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Ethylbenzene | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Di(2-ethylhexyl) phthalate | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| 2,4,5-TP | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Simazine | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Thallium, Total | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| 1,2-Dichloroethane | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| OXAMYL | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Styrene | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| 2,4-D | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Picloram | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Fluoride | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Heptachlor epoxide | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Selenium | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Picloram | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Beryllium, Total | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Barium | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| cis-1,2-Dichloroethylene | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Mercury | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Selenium | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Arsenic | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Tetrachloroethylene | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Heptachlor epoxide | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Dinoseb | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| LASSO | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| LASSO | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Chromium | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Chlordane | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Styrene | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Tetrachloroethylene | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Hexachlorocyclopentadiene | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Pentachlorophenol | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| 1,1,1-Trichloroethane | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Trichloroethylene | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| 1,2,4-Trichlorobenzene | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Toluene | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| OXAMYL | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Di(2-ethylhexyl) phthalate | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| CHLOROBENZENE | Resolved | Jan 1, 2023 to Dec 31, 2025 |
Valley West Trailer Court
MT0000444 · Groundwater · 115 people served system-wide
The system names this served city; Census place overlap links the city to this ZCTA.
No active health-based record in this imported snapshot
Find this utility’s official report →Measurements (1)
An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.
Lead (90th percentile)
EPA SDWIS Lead and Copper Rule samples
- Reported level
- 0.001 mg/L
- Action level
- 0.015 mg/L
7% of the listed benchmark
Monitoring period: Jan 1, 2023 to Dec 31, 2025
Violation history (1)
| Rule | Status | Period |
|---|---|---|
| Nitrate-Nitrite | Resolved | Jan 1, 2021 to Dec 31, 2021 |
Branco Court
MT0004568 · Groundwater · 37 people served system-wide
The system names this served city; Census place overlap links the city to this ZCTA.
No active health-based record in this imported snapshot
Find this utility’s official report →Measurements (1)
An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.
Lead (90th percentile)
EPA SDWIS Lead and Copper Rule samples
- Reported level
- 0 mg/L
- Action level
- 0.015 mg/L
0% of the listed benchmark
Monitoring period: Jan 1, 2021 to Dec 31, 2023
Violation history (0)
No record returned in this imported window. This is not a guarantee of tap-water safety.
Valley Grove Water Users Association
MT0000490 · Groundwater · 30 people served system-wide
The system names this served city; Census place overlap links the city to this ZCTA.
No active health-based record in this imported snapshot
Find this utility’s official report →Measurements (1)
An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.
Lead (90th percentile)
EPA SDWIS Lead and Copper Rule samples
- Reported level
- 0.01 mg/L
- Action level
- 0.015 mg/L
67% of the listed benchmark
Monitoring period: Jan 1, 2017 to Dec 31, 2019
Violation history (1)
| Rule | Status | Period |
|---|---|---|
| Lead and Copper Rule | Resolved | Oct 1, 2022 to Jun 6, 2023 |
Hardness estimate unavailable
No responsible local estimate yet
We did not find enough qualifying recent USGS hardness observations within 25 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.
Evidence-first next steps
Confirm the problem before choosing treatment
This profile can help you ask the right question. It cannot select equipment for a property without a current result from the serving utility or the tap.
Confirm the serving system
ZIP boundaries and utility service areas do not perfectly match. Verify the system on a water bill before relying on system-wide records.
Read the current utility report
Use the current Consumer Confidence Report for treated-water results and official notices.
Find an official utility report →Test for the decision you face
Ask the utility for hardness or test at the tap. For health concerns, use a certified laboratory and targeted analysis.
Convert your hardness test result →Frequently asked
Water questions for Lolo
Is tap water safe in Lolo?+
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?+
Utility-reported hardness is unavailable in this index. Regional samples do not establish tap-water hardness. Ask your provider or test your tap.
Do I need a water softener?+
Confirm hardness at your tap and consider actual scale or spotting before choosing treatment. Regional environmental values cannot determine whether you need a softener. A softener addresses hardness, not every contaminant.