Utility-reported hardness
Unavailable
Ask your provider or test your tap
Local water dashboard
Official source aggregationWater quality in Missoula, MT 59802
Regional hardness evidence, possible serving systems, EPA compliance history, and the measurements that are—and are not—available for Missoula County.
1 active health-based record(s) across possible systems
- Largest possible serving system
- Missoula Water
- 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
Review needed
1 active health-based record
Measurements by utility
Each result belongs to a specific system.
Utility match
10 systems
Serves 68,200 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.
Missoula Water
MT0000294 · Groundwater · 68,200 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
- 0.022 mg/L
- Action level
- 0.015 mg/L
147% 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.
Westview Mobile Home Park
MT0000437 · Groundwater · 947 people served system-wide
The system names this served city; Census place overlap links the city to this ZCTA.
1 reported active health-based record(s) for this system
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, 2021 to Dec 31, 2023
Violation history (22)
| Rule | Status | Period |
|---|---|---|
| 1,2,4-Trichlorobenzene | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Xylenes, Total | 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 |
| trans-1,2-Dichloroethylene | 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 |
| Tetrachloroethylene | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| CHLOROBENZENE | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Ethylbenzene | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Styrene | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| cis-1,2-Dichloroethylene | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Toluene | 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 |
| Carbon tetrachloride | 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 |
| 1,2-Dichloroethane | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| 1,1,1-Trichloroethane | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| DICHLOROMETHANE | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Lead and Copper RuleHealth-based | Unaddressed | Jan 1, 1998 |
Phantom Hills Water System
MT0004379 · Groundwater · 810 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
- 0.002 mg/L
- Action level
- 0.015 mg/L
13% of the listed benchmark
Monitoring period: Jan 1, 2020 to Dec 31, 2022
Violation history (0)
No record returned in this imported window. This is not a guarantee of tap-water safety.
Travois Village Mobile Park
MT0003909 · Groundwater · 702 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
- 0.002 mg/L
- Action level
- 0.015 mg/L
13% of the listed benchmark
Monitoring period: Jan 1, 2023 to Dec 31, 2025
Violation history (1)
| Rule | Status | Period |
|---|---|---|
| Consumer Confidence Rule | Resolved | Oct 1, 2023 to Oct 19, 2023 |
Greenfield Mobile Home Park
MT0000373 · Groundwater · 620 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, 2022 to Dec 31, 2024
Violation history (0)
No record returned in this imported window. This is not a guarantee of tap-water safety.
Wye Area Water System
MT0004107 · Groundwater · 512 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 |
|---|---|---|
| Lead and Copper Rule | Resolved | Dec 30, 2024 to Mar 17, 2025 |
Missoula Koa & El Mar Tlr Village
MT0002517 · Groundwater · 499 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
- 0.006 mg/L
- Action level
- 0.015 mg/L
40% of the listed benchmark
Monitoring period: Jan 1, 2011 to Dec 31, 2019
Violation history (4)
| Rule | Status | Period |
|---|---|---|
| Revised Total Coliform RuleHealth-based | Resolved | Jul 1, 2025 to Nov 17, 2025 |
| Lead and Copper Rule | Unaddressed | Oct 1, 2024 |
| Consumer Confidence Rule | Resolved | Oct 1, 2023 to Oct 24, 2023 |
| Consumer Confidence Rule | Resolved | Jul 1, 2023 to Jul 19, 2023 |
Grant Creek Water Users Association Inc
MT0003305 · Groundwater · 380 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 (2)
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, 2023 to Dec 31, 2025
Copper (90th percentile)
EPA SDWIS Lead and Copper Rule samples
- Reported level
- 2.51 mg/L
- Action level
- 1.3 mg/L
193% of the listed benchmark
Monitoring period: Jul 1, 2000 to Dec 31, 2000
Violation history (0)
No record returned in this imported window. This is not a guarantee of tap-water safety.
Katoonah Lodges
MT0003692 · Groundwater · 258 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
- 0.003 mg/L
- Action level
- 0.015 mg/L
20% 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.
Hollywood Heights Trailer Park Llc
MT0000454 · Groundwater · 220 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.
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
An active health-based record is present. Follow the utility's current notice and public-health instructions.
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 →Nearby indexed reports
More local profiles in Missoula
Estimates can differ across a city because monitoring locations and associated systems differ.
Frequently asked
Water questions for Missoula
Is tap water safe in Missoula?+
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?+
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.