Utility-reported hardness
Unavailable
Ask your provider or test your tap
Local water dashboard
Official source aggregationWater quality in Helena, MT 59625
Regional hardness evidence, possible serving systems, EPA compliance history, and the measurements that are—and are not—available for Lewis And Clark County.
Historical measurement record needs context
- Largest possible serving system
- Helena Water System
- Source water
- Surface water + Groundwater
- County
- Lewis And Clark 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
10 systems
Serves 32,091 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.
Helena Water System
MT0000241 · Surface water · 32,091 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
- 0.003 mg/L
- Action level
- 0.015 mg/L
20% of the listed benchmark
Monitoring period: Jan 1, 2022 to Dec 31, 2024
Total Haloacetic Acids (HAA5)
EPA SDWIS reported health-based violation
- Reported level
- 0.062 MG/L
- Maximum contaminant level
- 0.06 MG/L
103% of the listed benchmark
Monitoring period: Jan 1, 2023 to Mar 31, 2023
Violation history (3)
| Rule | Status | Period |
|---|---|---|
| Total Haloacetic Acids (HAA5)Health-based | Resolved | Jan 1, 2023 to Mar 31, 2023 |
| Total Haloacetic Acids (HAA5)Health-based | Resolved | Oct 1, 2022 to Dec 31, 2022 |
| Total Haloacetic Acids (HAA5)Health-based | Resolved | Jul 1, 2022 to Sep 30, 2022 |
East Helena City Of
MT0000196 · Groundwater · 2,114 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
- 0.001 mg/L
- Action level
- 0.015 mg/L
7% of the listed benchmark
Monitoring period: Jan 1, 2025 to Dec 31, 2025
Copper (90th percentile)
EPA SDWIS Lead and Copper Rule samples
- Reported level
- 1.59 mg/L
- Action level
- 1.3 mg/L
122% of the listed benchmark
Monitoring period: Jul 1, 1993 to Dec 31, 1993
Violation history (3)
| Rule | Status | Period |
|---|---|---|
| Revised Total Coliform Rule | Resolved | Jun 1, 2025 to Jun 30, 2025 |
| Lead and Copper RuleHealth-based | Resolved | Nov 4, 2022 to Jan 24, 2023 |
| Consumer Confidence Rule | Resolved | Jul 1, 2021 to Aug 5, 2021 |
Helena Leisure Llc
MT0000590 · Groundwater · 1,200 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
- 0.001 mg/L
- Action level
- 0.015 mg/L
7% of the listed benchmark
Monitoring period: Jan 1, 2022 to Dec 31, 2024
Violation history (29)
| Rule | Status | Period |
|---|---|---|
| Lead and Copper Rule | Resolved | Dec 30, 2024 to Feb 4, 2025 |
| Revised Total Coliform Rule | Resolved | Mar 1, 2023 to Mar 31, 2023 |
| Lead and Copper Rule | Resolved | Dec 30, 2021 to Jan 10, 2022 |
| Consumer Confidence Rule | Resolved | Jul 1, 2021 to Jul 29, 2021 |
| BHC-GAMMA | Resolved | Jul 1, 2021 to Sep 30, 2021 |
| Toxaphene | Resolved | Jul 1, 2021 to Sep 30, 2021 |
| Dalapon | Resolved | Jul 1, 2021 to Sep 30, 2021 |
| Di(2-ethylhexyl) adipate | Resolved | Jul 1, 2021 to Sep 30, 2021 |
| OXAMYL | Resolved | Jul 1, 2021 to Sep 30, 2021 |
| Simazine | Resolved | Jul 1, 2021 to Sep 30, 2021 |
| Di(2-ethylhexyl) phthalate | Resolved | Jul 1, 2021 to Sep 30, 2021 |
| Picloram | Resolved | Jul 1, 2021 to Sep 30, 2021 |
| Dinoseb | Resolved | Jul 1, 2021 to Sep 30, 2021 |
| Carbofuran | Resolved | Jul 1, 2021 to Sep 30, 2021 |
| Atrazine | Resolved | Jul 1, 2021 to Sep 30, 2021 |
| Heptachlor | Resolved | Jul 1, 2021 to Sep 30, 2021 |
| Heptachlor epoxide | Resolved | Jul 1, 2021 to Sep 30, 2021 |
| 2,4-D | Resolved | Jul 1, 2021 to Sep 30, 2021 |
| HEXACHLOROBENZENE | Resolved | Jul 1, 2021 to Sep 30, 2021 |
| Benzo(a)pyrene | Resolved | Jul 1, 2021 to Sep 30, 2021 |
| Chlordane | Resolved | Jul 1, 2021 to Sep 30, 2021 |
| Combined Radium (-226 and -228) | Resolved | Jul 1, 2021 to Sep 30, 2021 |
| Gross Alpha, Excl. Radon and U | Resolved | Jul 1, 2021 to Sep 30, 2021 |
| LASSO | Resolved | Jul 1, 2021 to Sep 30, 2021 |
| Pentachlorophenol | Resolved | Jul 1, 2021 to Sep 30, 2021 |
| Endrin | Resolved | Jul 1, 2021 to Sep 30, 2021 |
| 2,4,5-TP | Resolved | Jul 1, 2021 to Sep 30, 2021 |
| Methoxychlor | Resolved | Jul 1, 2021 to Sep 30, 2021 |
| Hexachlorocyclopentadiene | Resolved | Jul 1, 2021 to Sep 30, 2021 |
Jefferson Hills Wua
MT0002978 · Groundwater · 780 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 (4)
| Rule | Status | Period |
|---|---|---|
| Lead and Copper Rule | Unaddressed | Dec 30, 2024 |
| Consumer Confidence Rule | Resolved | Jul 1, 2023 to Aug 14, 2023 |
| Revised Total Coliform RuleHealth-based | Resolved | Jun 3, 2023 to Mar 28, 2024 |
| Consumer Confidence Rule | Resolved | Jul 1, 2022 to Jul 21, 2022 |
Ten Mile And Pleasant Valley Wua
MT0002005 · Groundwater · 750 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: Jul 1, 2024 to Dec 31, 2024
Copper (90th percentile)
EPA SDWIS Lead and Copper Rule samples
- Reported level
- 2.1 mg/L
- Action level
- 1.3 mg/L
162% of the listed benchmark
Monitoring period: Jan 1, 2021 to Dec 31, 2023
Violation history (29)
| Rule | Status | Period |
|---|---|---|
| Lead and Copper Rule | Unaddressed | Jan 1, 2026 |
| Lead and Copper Rule | Resolved | Apr 1, 2024 to Jun 26, 2024 |
| Lead and Copper RuleHealth-based | Resolved | Apr 1, 2024 to Jun 26, 2024 |
| Consumer Confidence Rule | Resolved | Oct 1, 2023 to Oct 13, 2023 |
| Consumer Confidence Rule | Resolved | Jul 1, 2023 to Feb 12, 2024 |
| Consumer Confidence Rule | Resolved | Jul 1, 2022 to Jul 11, 2022 |
| Xylenes, Total | Resolved | Jul 1, 2021 to Sep 30, 2021 |
| DICHLOROMETHANE | Resolved | Jul 1, 2021 to Sep 30, 2021 |
| o-Dichlorobenzene | Resolved | Jul 1, 2021 to Sep 30, 2021 |
| p-Dichlorobenzene | Resolved | Jul 1, 2021 to Sep 30, 2021 |
| 1,2-Dichloroethane | Resolved | Jul 1, 2021 to Sep 30, 2021 |
| 1,1,1-Trichloroethane | Resolved | Jul 1, 2021 to Sep 30, 2021 |
| Carbon tetrachloride | Resolved | Jul 1, 2021 to Sep 30, 2021 |
| 1,2-Dichloropropane | Resolved | Jul 1, 2021 to Sep 30, 2021 |
| Trichloroethylene | Resolved | Jul 1, 2021 to Sep 30, 2021 |
| CHLOROBENZENE | Resolved | Jul 1, 2021 to Sep 30, 2021 |
| Toluene | Resolved | Jul 1, 2021 to Sep 30, 2021 |
| Ethylbenzene | Resolved | Jul 1, 2021 to Sep 30, 2021 |
| Consumer Confidence Rule | Resolved | Jul 1, 2021 to Jul 19, 2021 |
| 1,2,4-Trichlorobenzene | Resolved | Jul 1, 2021 to Sep 30, 2021 |
| 1,1-Dichloroethylene | Resolved | Jul 1, 2021 to Sep 30, 2021 |
| 1,1,2-Trichloroethane | Resolved | Jul 1, 2021 to Sep 30, 2021 |
| Vinyl chloride | Resolved | Jul 1, 2021 to Sep 30, 2021 |
| Benzene | Resolved | Jul 1, 2021 to Sep 30, 2021 |
| Styrene | Resolved | Jul 1, 2021 to Sep 30, 2021 |
| Tetrachloroethylene | Resolved | Jul 1, 2021 to Sep 30, 2021 |
| trans-1,2-Dichloroethylene | Resolved | Jul 1, 2021 to Sep 30, 2021 |
| cis-1,2-Dichloroethylene | Resolved | Jul 1, 2021 to Sep 30, 2021 |
| Revised Total Coliform Rule | Resolved | Jun 1, 2021 to Jun 30, 2021 |
North Star Pud
MT0004264 · Groundwater · 715 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
- 0.007 mg/L
- Action level
- 0.015 mg/L
47% of the listed benchmark
Monitoring period: Jan 1, 2023 to Dec 31, 2025
Violation history (3)
| Rule | Status | Period |
|---|---|---|
| Lead and Copper Rule | Resolved | Oct 1, 2025 to Sep 30, 2025 |
| Total Haloacetic Acids (HAA5) | Resolved | Jan 1, 2023 to Oct 18, 2023 |
| TTHM | Resolved | Jan 1, 2023 to Oct 18, 2023 |
Mchugh Mobile Home Park
MT0002917 · Groundwater · 490 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, 2022 to Dec 31, 2024
Violation history (2)
| Rule | Status | Period |
|---|---|---|
| Consumer Confidence Rule | Unaddressed | Oct 1, 2025 |
| Consumer Confidence Rule | Resolved | Jul 1, 2025 to Jul 17, 2025 |
Treasure State Acres Wua
MT0002390 · Groundwater · 483 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 (0)
No record returned in this imported window. This is not a guarantee of tap-water safety.
La Casa Grande Water And Sewer District
MT0001924 · Groundwater · 404 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, 2015 to Dec 31, 2017
Violation history (2)
| Rule | Status | Period |
|---|---|---|
| Lead and Copper Rule | Resolved | Oct 1, 2024 to Sep 30, 2024 |
| Lead and Copper Rule | Unaddressed | Oct 1, 2007 |
Skyview Water And Sewer Utility
MT0004039 · Groundwater · 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 (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
- 0.014 mg/L
- Action level
- 0.015 mg/L
93% of the listed benchmark
Monitoring period: Jan 1, 2011 to Dec 31, 2019
Copper (90th percentile)
EPA SDWIS Lead and Copper Rule samples
- Reported level
- 1.38 mg/L
- Action level
- 1.3 mg/L
106% of the listed benchmark
Monitoring period: Jan 1, 1999 to Jun 30, 1999
Violation history (3)
| Rule | Status | Period |
|---|---|---|
| E. COLI | Resolved | Aug 14, 2025 to Sep 23, 2025 |
| Consumer Confidence Rule | Resolved | Jul 1, 2023 to Jul 20, 2023 |
| Revised Total Coliform RuleHealth-based | Resolved | Nov 15, 2022 to Dec 27, 2022 |
Hardness meter
What does nearby environmental evidence show?
29.1
PPM as CaCO₃
Soft
PPM
29.1
GPG
1.7
Regional environmental evidence
USGS hardness classification scale
29.1 PPM
Soft
0–60Moderate
61–120Hard
121–180Very hard
181+
0–60Moderate
61–120Hard
121–180Very hard
181+
Parts per million
29.1
mg/L as CaCO₃ equivalent
Grains per gallon
1.7
1 GPG ≈ 17.1 PPM
How to use regional evidence
These samples describe nearby environmental water. They cannot establish whether your tap water is soft or hard. Use a utility result or a tap test for appliance settings and treatment sizing.
USGS sites used
23
Nearest site
11.7 mi
Observation range
Sep 6, 2016–Aug 7, 2024
Regional evidence confidence
Moderate
Median of the latest source-type-aligned hardness observation at each monitoring site within 25 miles. Nearest monitoring location: Tenmile Creek near Rimini MT (Stream).USGS source documentation ↗Evidence tier: Regional environmental evidence. This value is not used as proof of the serving utility's treated-water hardness.
Regional context
Is 59625 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Helena median
33 PPM
About the same3 indexed ZIP readings · Range 29.1–37.1 PPM
Montana median
94 PPM
65 PPM lower22 indexed ZIP readings · Range 26.3–629 PPM
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
A reported action-level record needs context. Check its monitoring period and the utility's current report.
Find an official utility report →Test for the decision you face
Use a tap hardness test before sizing a softener. For health concerns, use a certified laboratory and the correct sampling protocol.
Convert your hardness test result →Nearby indexed reports
More local profiles in Helena
Estimates can differ across a city because monitoring locations and associated systems differ.
Frequently asked
Water questions for Helena
Is tap water safe in Helena?+
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.