City water profile

Water hardness in Great Falls

Find official utility reports, understand hardness, and check the water system serving your home in Great Falls, Montana.

Utility-reported hardness

Not yet available

Check your provider and source →

State comparison: Unavailable
Evidence comparison rank: —
Matched utilities: 10
Active health records: 0

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 →

Convert a hardness result →Test your tap →

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.

Great Falls City Of

MT0000525 · Surface water · 60,000 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

Below action level

Reported level: 0.012 mg/L
Action level: 0.015 mg/L

80% of the listed benchmark

Monitoring period: Jan 1, 2026 to Jun 30, 2026

Violation history (0)

No record returned in this imported window. This is not a guarantee of tap-water safety.

Malmstrom Air Force Base

MT0000515 · Surface water · 8,850 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

Below action level

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

Copper (90th percentile)

EPA SDWIS Lead and Copper Rule samples

Above action level

Reported level: 2.21 mg/L
Action level: 1.3 mg/L

170% of the listed benchmark

Monitoring period: Jan 1, 2016 to Dec 31, 2018

Violation history (5)

Imported violation history for Malmstrom Air Force Base
Rule	Status	Period
Revised Total Coliform Rule	Resolved	Nov 1, 2024 to Nov 30, 2024
TTHM	Resolved	Apr 1, 2024 to Jun 30, 2024
Total Haloacetic Acids (HAA5)	Resolved	Apr 1, 2024 to Jun 30, 2024
Consumer Confidence Rule	Resolved	Jul 1, 2023 to Jul 26, 2023
Lead and Copper Rule	Resolved	Dec 30, 2021 to Jan 5, 2022

Sun Prairie Village County

MT0000521 · Groundwater · 1,800 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

Below action level

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 (2)

Imported violation history for Sun Prairie Village County
Rule	Status	Period
Consumer Confidence Rule	Resolved	Oct 1, 2023 to Oct 19, 2023
Consumer Confidence Rule	Resolved	Jul 1, 2023 to Oct 19, 2023

Prairie Water Company

MT0003539 · Surface water · 1,000 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

Below action level

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 (7)

Imported violation history for Prairie Water Company
Rule	Status	Period
Lead and Copper Rule	Resolved	Dec 30, 2024 to Jul 1, 2025
Consumer Confidence Rule	Unaddressed	Oct 1, 2024
Consumer Confidence Rule	Resolved	Jul 1, 2024 to Jul 1, 2025
Consumer Confidence Rule	Unaddressed	Oct 1, 2023
Revised Total Coliform Rule	Resolved	Sep 1, 2023 to Sep 30, 2023
Consumer Confidence Rule	Unaddressed	Jul 1, 2023
Lead and Copper Rule	Resolved	Dec 30, 2021 to Jul 1, 2025

Countryside Village Mhp Grt Fls

MT0004830 · Surface water · 600 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 (0)

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.

No comparable numerical result available

Federal SDWIS data does not provide a usable numerical result and benchmark for this profile. Missing data is not a pass. Check the serving utility's current Consumer Confidence Report.

Violation history (0)

No record returned in this imported window. This is not a guarantee of tap-water safety.

Gore Hill County Water Dist

MT0000232 · Groundwater · 500 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

Below action level

Reported level: 0.004 mg/L
Action level: 0.015 mg/L

27% of the listed benchmark

Monitoring period: Jan 1, 2025 to Dec 31, 2025

Copper (90th percentile)

EPA SDWIS Lead and Copper Rule samples

Above action level

Reported level: 2.12 mg/L
Action level: 1.3 mg/L

163% of the listed benchmark

Monitoring period: Jul 1, 1995 to Dec 31, 1995

Violation history (50)

Imported violation history for Gore Hill County Water Dist
Rule	Status	Period
E. COLI	Resolved	Jul 22, 2025 to Jul 24, 2025
Endrin	Resolved	Jul 1, 2024 to Sep 30, 2024
BHC-GAMMA	Resolved	Jul 1, 2024 to Sep 30, 2024
Toxaphene	Resolved	Jul 1, 2024 to Sep 30, 2024
OXAMYL	Resolved	Jul 1, 2024 to Sep 30, 2024
Dinoseb	Resolved	Jul 1, 2024 to Sep 30, 2024
Carbofuran	Resolved	Jul 1, 2024 to Sep 30, 2024
Atrazine	Resolved	Jul 1, 2024 to Sep 30, 2024
LASSO	Resolved	Jul 1, 2024 to Sep 30, 2024
Heptachlor epoxide	Resolved	Jul 1, 2024 to Sep 30, 2024
2,4,5-TP	Resolved	Jul 1, 2024 to Sep 30, 2024
HEXACHLOROBENZENE	Resolved	Jul 1, 2024 to Sep 30, 2024
Pentachlorophenol	Resolved	Jul 1, 2024 to Sep 30, 2024
Chlordane	Resolved	Jul 1, 2024 to Sep 30, 2024
Endrin	Resolved	Jul 1, 2024 to Sep 30, 2024
BHC-GAMMA	Resolved	Jul 1, 2024 to Sep 30, 2024
Toxaphene	Resolved	Jul 1, 2024 to Sep 30, 2024
Dalapon	Resolved	Jul 1, 2024 to Sep 30, 2024
OXAMYL	Resolved	Jul 1, 2024 to Sep 30, 2024
Dinoseb	Resolved	Jul 1, 2024 to Sep 30, 2024
Hexachlorocyclopentadiene	Resolved	Jul 1, 2024 to Sep 30, 2024
2,4-D	Resolved	Jul 1, 2024 to Sep 30, 2024
HEXACHLOROBENZENE	Resolved	Jul 1, 2024 to Sep 30, 2024
Benzo(a)pyrene	Resolved	Jul 1, 2024 to Sep 30, 2024
Pentachlorophenol	Resolved	Jul 1, 2024 to Sep 30, 2024
Chlordane	Resolved	Jul 1, 2024 to Sep 30, 2024
Di(2-ethylhexyl) phthalate	Resolved	Jul 1, 2024 to Sep 30, 2024
Benzo(a)pyrene	Resolved	Jul 1, 2024 to Sep 30, 2024
Carbofuran	Resolved	Jul 1, 2024 to Sep 30, 2024
Methoxychlor	Resolved	Jul 1, 2024 to Sep 30, 2024
Simazine	Resolved	Jul 1, 2024 to Sep 30, 2024
Picloram	Resolved	Jul 1, 2024 to Sep 30, 2024
Di(2-ethylhexyl) adipate	Resolved	Jul 1, 2024 to Sep 30, 2024
2,4-D	Resolved	Jul 1, 2024 to Sep 30, 2024
LASSO	Resolved	Jul 1, 2024 to Sep 30, 2024
Dalapon	Resolved	Jul 1, 2024 to Sep 30, 2024
Di(2-ethylhexyl) phthalate	Resolved	Jul 1, 2024 to Sep 30, 2024
Picloram	Resolved	Jul 1, 2024 to Sep 30, 2024
Hexachlorocyclopentadiene	Resolved	Jul 1, 2024 to Sep 30, 2024
Heptachlor epoxide	Resolved	Jul 1, 2024 to Sep 30, 2024
Methoxychlor	Resolved	Jul 1, 2024 to Sep 30, 2024
Simazine	Resolved	Jul 1, 2024 to Sep 30, 2024
Atrazine	Resolved	Jul 1, 2024 to Sep 30, 2024
2,4,5-TP	Resolved	Jul 1, 2024 to Sep 30, 2024
Di(2-ethylhexyl) adipate	Resolved	Jul 1, 2024 to Sep 30, 2024
Heptachlor	Resolved	Jul 1, 2024 to Sep 30, 2024
Heptachlor	Resolved	Jul 1, 2024 to Sep 30, 2024
Combined Radium (-226 and -228)	Resolved	Apr 1, 2024 to Jun 30, 2024
Gross Alpha, Excl. Radon and U	Resolved	Apr 1, 2024 to Jun 30, 2024
Lead and Copper Rule	Resolved	Oct 1, 2023 to Dec 3, 2024

Bushard Water Company

MT0005164 · Surface water · 425 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

Below action level

Reported level: 0 mg/L
Action level: 0.015 mg/L

0% of the listed benchmark

Monitoring period: Jan 1, 2025 to Jun 30, 2025

Violation history (5)

Imported violation history for Bushard Water Company
Rule	Status	Period
Revised Total Coliform Rule	Resolved	Dec 1, 2025 to Dec 31, 2025
Groundwater RuleHealth-based	Resolved	Oct 18, 2024 to Nov 8, 2024
Revised Total Coliform Rule	Resolved	Oct 1, 2024 to Oct 31, 2024
Revised Total Coliform Rule	Resolved	Jul 1, 2024 to Jul 31, 2024
Revised Total Coliform Rule	Resolved	Jun 1, 2024 to Jun 30, 2024

Highwood Mobile Home Park

MT0004681 · Surface water · 400 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

Below action level

Reported level: 0.003 mg/L
Action level: 0.015 mg/L

20% of the listed benchmark

Monitoring period: Jan 1, 2011 to Jun 30, 2011

Violation history (1)

Imported violation history for Highwood Mobile Home Park
Rule	Status	Period
Surface Water Treatment Rule	Resolved	Dec 1, 2023 to Dec 31, 2023

Sun Prairie Water District

MT0000571 · Groundwater · 350 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

Below action level

Reported level: 0 mg/L
Action level: 0.015 mg/L

0% of the listed benchmark

Monitoring period: Jan 1, 2015 to Dec 31, 2017

Violation history (49)

Imported violation history for Sun Prairie Water District
Rule	Status	Period
Nitrate-Nitrite	Resolved	Jan 1, 2025 to Dec 31, 2025
Consumer Confidence Rule	Resolved	Oct 1, 2023 to Nov 1, 2023
Consumer Confidence Rule	Resolved	Jul 1, 2023 to Oct 19, 2023
BHC-GAMMA	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
OXAMYL	Resolved	Jan 1, 2023 to Dec 31, 2025
Di(2-ethylhexyl) phthalate	Resolved	Jan 1, 2023 to Dec 31, 2025
Picloram	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
LASSO	Resolved	Jan 1, 2023 to Dec 31, 2025
Heptachlor epoxide	Resolved	Jan 1, 2023 to Dec 31, 2025
HEXACHLOROBENZENE	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
DICHLOROMETHANE	Resolved	Jan 1, 2023 to Dec 31, 2025
Vinyl chloride	Resolved	Jan 1, 2023 to Dec 31, 2025
1,1,1-Trichloroethane	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
Ethylbenzene	Resolved	Jan 1, 2023 to Dec 31, 2025
Styrene	Resolved	Jan 1, 2023 to Dec 31, 2025
Endrin	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
Carbon tetrachloride	Resolved	Jan 1, 2023 to Dec 31, 2025
Tetrachloroethylene	Resolved	Jan 1, 2023 to Dec 31, 2025
Heptachlor	Resolved	Jan 1, 2023 to Dec 31, 2025
p-Dichlorobenzene	Resolved	Jan 1, 2023 to Dec 31, 2025
Dinoseb	Resolved	Jan 1, 2023 to Dec 31, 2025
Benzo(a)pyrene	Resolved	Jan 1, 2023 to Dec 31, 2025
o-Dichlorobenzene	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
Simazine	Resolved	Jan 1, 2023 to Dec 31, 2025
1,1-Dichloroethylene	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
Methoxychlor	Resolved	Jan 1, 2023 to Dec 31, 2025
Xylenes, Total	Resolved	Jan 1, 2023 to Dec 31, 2025
Revised Total Coliform Rule	Resolved	Dec 1, 2021 to Dec 31, 2021
Consumer Confidence Rule	Resolved	Oct 1, 2021 to Oct 28, 2021

Great Falls Rv Park

MT0000027 · Surface water · 274 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 (0)

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.

No comparable numerical result available

Federal SDWIS data does not provide a usable numerical result and benchmark for this profile. Missing data is not a pass. Check the serving utility's current Consumer Confidence Report.

Violation history (0)

No record returned in this imported window. This is not a guarantee of tap-water safety.

City summary

What the indexed records say

Great Falls has 3 published ZIP profiles across Cascade County. No qualifying nearby hardness observation is available for the city.

The —–— PPM range shows how much the available ZIP estimates vary within the city label.

Hardness distribution

How local ZIP estimates compare

Soft0 ZIPs

Moderately hard0 ZIPs

Hard0 ZIPs

Very hard0 ZIPs

0 of 3 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance: — miles
Profiles with evidence: 0/3

Confidence labels

High: 0Moderate: 0Low: 0

Observation window: unavailable to unavailable.

ZIP directory

Water reports in Great Falls

Open a ZIP for site-level provenance and measurements.

ZIP code

59401

No estimate

—

Nearest site: — mi
Confidence: —

View full ZIP evidence →

ZIP code

59404

No estimate

—

Nearest site: — mi
Confidence: —

View full ZIP evidence →

ZIP code

59405

No estimate

—

Nearest site: — mi
Confidence: —

View full ZIP evidence →

Practical next steps

Move from index to evidence

1. Open your ZIP. Check distance, dates, confidence, and the associated utility.
2. Read the current CCR. Confirm source water, detections, limits, ranges, and notices.
3. Use a measured hardness result. Confirm health concerns or treatment sizing with the right method.

Continue comparing

Other Montana communities

Neihart

Cascade County

160 PPM median

Black Eagle

Cascade County

— No median

Sand Coulee

Cascade County

— No median

Stockett

Cascade County

— No median

Sun River

Cascade County

— No median

Ulm

Cascade County

— No median

Search all 133 Montana cities →

Questions people ask

About water in Great Falls

Is the water hard?

Check the utility-reported result above when available. Nearby environmental samples cannot establish tap-water hardness. Ask your provider or test your tap.

Is the tap water safe?

Compliance history is utility-wide and cannot guarantee conditions at every tap. Check current notices and test when address-specific evidence is needed.

Do I need treatment?

Choose treatment only after confirming the problem at the property. A softener targets hardness; contaminant treatment requires a matching, verified performance claim.