Utility-reported hardness
Unavailable
Ask your provider or test your tap
Local water dashboard
Official source aggregationWater quality in Columbus, MT 59019
Regional hardness evidence, possible serving systems, EPA compliance history, and the measurements that are—and are not—available for Stillwater County.
Historical measurement record needs context
- Largest possible serving system
- Columbus Town Of
- Source water
- Groundwater
- County
- Stillwater 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
5 systems
Serves 1,900 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.
Columbus Town Of
MT0000185 · Groundwater · 1,900 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
- 0.004 mg/L
- Action level
- 0.015 mg/L
27% of the listed benchmark
Monitoring period: Jan 1, 2015 to Dec 31, 2017
Copper (90th percentile)
EPA SDWIS Lead and Copper Rule samples
- Reported level
- 1.4 mg/L
- Action level
- 1.3 mg/L
108% of the listed benchmark
Monitoring period: Jan 1, 1996 to Jun 30, 1996
Violation history (0)
No record returned in this imported window. This is not a guarantee of tap-water safety.
Country Haven Estates Whispering Pines
MT0004376 · Groundwater · 100 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, 2025 to Jun 30, 2025
Violation history (80)
| Rule | Status | Period |
|---|---|---|
| Revised Total Coliform Rule | Resolved | Aug 1, 2025 to Aug 31, 2025 |
| Revised Total Coliform Rule | Resolved | May 1, 2025 to May 31, 2025 |
| Lead and Copper Rule | Resolved | Apr 1, 2025 to May 20, 2025 |
| Lead and Copper Rule | Resolved | Oct 1, 2024 to May 20, 2025 |
| Revised Total Coliform Rule | Resolved | Aug 1, 2024 to Aug 31, 2024 |
| E. COLI | Resolved | Nov 21, 2023 to Jan 22, 2023 |
| Revised Total Coliform Rule | Resolved | Oct 1, 2023 to Oct 31, 2023 |
| Combined Radium (-226 and -228) | Resolved | Apr 1, 2023 to Jun 30, 2023 |
| Gross Alpha, Excl. Radon and U | Resolved | Apr 1, 2023 to Jun 30, 2023 |
| Endrin | Resolved | Apr 1, 2023 to Jun 30, 2023 |
| Di(2-ethylhexyl) adipate | Resolved | Apr 1, 2023 to Jun 30, 2023 |
| OXAMYL | Resolved | Apr 1, 2023 to Jun 30, 2023 |
| Simazine | Resolved | Apr 1, 2023 to Jun 30, 2023 |
| Di(2-ethylhexyl) phthalate | Resolved | Apr 1, 2023 to Jun 30, 2023 |
| Picloram | Resolved | Apr 1, 2023 to Jun 30, 2023 |
| Carbofuran | Resolved | Apr 1, 2023 to Jun 30, 2023 |
| Heptachlor | Resolved | Apr 1, 2023 to Jun 30, 2023 |
| Heptachlor epoxide | Resolved | Apr 1, 2023 to Jun 30, 2023 |
| 2,4,5-TP | Resolved | Apr 1, 2023 to Jun 30, 2023 |
| HEXACHLOROBENZENE | Resolved | Apr 1, 2023 to Jun 30, 2023 |
| Chlordane | Resolved | Apr 1, 2023 to Jun 30, 2023 |
| Endrin | Resolved | Apr 1, 2023 to Jun 30, 2023 |
| BHC-GAMMA | Resolved | Apr 1, 2023 to Jun 30, 2023 |
| Methoxychlor | Resolved | Apr 1, 2023 to Jun 30, 2023 |
| OXAMYL | Resolved | Apr 1, 2023 to Jun 30, 2023 |
| Di(2-ethylhexyl) phthalate | Resolved | Apr 1, 2023 to Jun 30, 2023 |
| Picloram | Resolved | Apr 1, 2023 to Jun 30, 2023 |
| Hexachlorocyclopentadiene | Resolved | Apr 1, 2023 to Jun 30, 2023 |
| Carbofuran | Resolved | Apr 1, 2023 to Jun 30, 2023 |
| Atrazine | Resolved | Apr 1, 2023 to Jun 30, 2023 |
| Heptachlor | Resolved | Apr 1, 2023 to Jun 30, 2023 |
| 2,4-D | Resolved | Apr 1, 2023 to Jun 30, 2023 |
| 2,4,5-TP | Resolved | Apr 1, 2023 to Jun 30, 2023 |
| Pentachlorophenol | Resolved | Apr 1, 2023 to Jun 30, 2023 |
| Chlordane | Resolved | Apr 1, 2023 to Jun 30, 2023 |
| Benzo(a)pyrene | Resolved | Apr 1, 2023 to Jun 30, 2023 |
| Toxaphene | Resolved | Apr 1, 2023 to Jun 30, 2023 |
| LASSO | Resolved | Apr 1, 2023 to Jun 30, 2023 |
| Gross Alpha, Excl. Radon and U | Resolved | Apr 1, 2023 to Jun 30, 2023 |
| Dinoseb | Resolved | Apr 1, 2023 to Jun 30, 2023 |
| Di(2-ethylhexyl) adipate | Resolved | Apr 1, 2023 to Jun 30, 2023 |
| Dalapon | Resolved | Apr 1, 2023 to Jun 30, 2023 |
| Heptachlor epoxide | Resolved | Apr 1, 2023 to Jun 30, 2023 |
| Combined Radium (-226 and -228) | Resolved | Apr 1, 2023 to Jun 30, 2023 |
| BHC-GAMMA | Resolved | Apr 1, 2023 to Jun 30, 2023 |
| Methoxychlor | Resolved | Apr 1, 2023 to Jun 30, 2023 |
| Pentachlorophenol | Resolved | Apr 1, 2023 to Jun 30, 2023 |
| Hexachlorocyclopentadiene | Resolved | Apr 1, 2023 to Jun 30, 2023 |
| Atrazine | Resolved | Apr 1, 2023 to Jun 30, 2023 |
| 2,4-D | Resolved | Apr 1, 2023 to Jun 30, 2023 |
| LASSO | Resolved | Apr 1, 2023 to Jun 30, 2023 |
| Benzo(a)pyrene | Resolved | Apr 1, 2023 to Jun 30, 2023 |
| HEXACHLOROBENZENE | Resolved | Apr 1, 2023 to Jun 30, 2023 |
| Dinoseb | Resolved | Apr 1, 2023 to Jun 30, 2023 |
| Toxaphene | Resolved | Apr 1, 2023 to Jun 30, 2023 |
| Simazine | Resolved | Apr 1, 2023 to Jun 30, 2023 |
| Dalapon | Resolved | Apr 1, 2023 to Jun 30, 2023 |
| Cadmium | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Fluoride | 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 |
| Selenium | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Barium | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Chromium | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Fluoride | 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 |
| Beryllium, Total | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Arsenic | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Chromium | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Cadmium | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Arsenic | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Thallium, Total | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Nickel | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Barium | Resolved | Jan 1, 2023 to Dec 31, 2025 |
| Antimony, Total | 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 |
| Nitrate-Nitrite | Resolved | Jan 1, 2022 to Dec 31, 2022 |
Hilltop Water
MT0005205 · Groundwater · 50 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: Jul 1, 2025 to Dec 31, 2025
Violation history (0)
No record returned in this imported window. This is not a guarantee of tap-water safety.
Eagle Mountain Rural Pws
MT0004461 · Groundwater · 50 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, 2021 to Dec 31, 2023
Violation history (1)
| Rule | Status | Period |
|---|---|---|
| Consumer Confidence Rule | Resolved | Jul 1, 2024 to Aug 13, 2024 |
Sherwood Water Station
MT0004059 · Groundwater · 25 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, 2023 to Dec 31, 2025
Violation history (5)
| Rule | Status | Period |
|---|---|---|
| Consumer Confidence Rule | Resolved | Jul 1, 2024 to Aug 13, 2024 |
| Revised Total Coliform Rule | Resolved | Jun 1, 2023 to Jun 30, 2023 |
| Revised Total Coliform Rule | Resolved | Mar 1, 2023 to Mar 31, 2023 |
| Revised Total Coliform Rule | Resolved | Dec 1, 2021 to Dec 31, 2021 |
| Revised Total Coliform Rule | Resolved | Feb 1, 2021 to Feb 28, 2021 |
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
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
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 Columbus
Is tap water safe in Columbus?+
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.