How hard is the water in Sidney, MT?

Utility-reported hardness is unavailable in this index. Regional environmental samples cannot establish tap-water hardness. Ask your provider or test your tap.

Local water dashboard

Official source aggregation

Water quality in Sidney, MT 59270

Q: Is tap water safe in Sidney?

EPA SDWIS reports 1 active health-based violation record(s) among systems associated with this ZIP. Review your utility's current notice and Consumer Confidence Report.

Regional hardness evidence, possible serving systems, EPA compliance history, and the measurements that are—and are not—available for Richland County.

1 active health-based record(s) across possible systems

Largest possible serving system: Sidney City Of
Source water: Groundwater
County: Richland County
Profile updated: Jun 29, 2026

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 →

At a glance

What the current records say

EPA quarter 2026Q2

Utility-reported hardness

Unavailable

Ask your provider or test your tap

All possible systems

Review needed

1 active health-based record

Measurements by utility

Choose your provider

Each result belongs to a specific system.

Utility match

4 systems

Serves 5,000 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.

Sidney City Of

MT0000330 · Groundwater · 5,000 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: 0.004 mg/L
Action level: 0.015 mg/L

27% 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.

Dry Redwater Regional Water Authority

MT0004839 · Groundwater · 365 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 (3)

Imported violation history for Dry Redwater Regional Water Authority
Rule	Status	Period
Revised Total Coliform Rule	Resolved	May 1, 2024 to May 31, 2024
Revised Total Coliform Rule	Resolved	Apr 1, 2024 to Apr 30, 2024
Revised Total Coliform Rule	Resolved	Mar 1, 2024 to Mar 18, 2024

Richland Co Valley View Wua

MT0000514 · Groundwater · 85 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 (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: 0.005 mg/L
Action level: 0.015 mg/L

33% of the listed benchmark

Monitoring period: Jan 1, 2023 to Dec 31, 2025

TTHM

EPA SDWIS reported health-based violation

Reported violation

Reported level: 0.097 MG/L
Maximum contaminant level: 0.08 MG/L

121% of the listed benchmark

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

Violation history (17)

Imported violation history for Richland Co Valley View Wua
Rule	Status	Period
TTHMHealth-based	Unaddressed	Apr 1, 2026 to Jun 30, 2026
TTHMHealth-based	Archived	Jan 1, 2026 to Mar 31, 2026
TTHMHealth-based	Archived	Oct 1, 2025 to Dec 31, 2025
TTHMHealth-based	Archived	Jul 1, 2025 to Sep 30, 2025
TTHMHealth-based	Archived	Apr 1, 2025 to Jun 30, 2025
TTHMHealth-based	Archived	Jan 1, 2025 to Mar 31, 2025
TTHMHealth-based	Archived	Oct 1, 2024 to Dec 31, 2024
Revised Total Coliform Rule	Resolved	Sep 1, 2024 to Sep 30, 2024
Consumer Confidence Rule	Resolved	Jul 1, 2024 to Aug 14, 2024
TTHMHealth-based	Archived	Jul 1, 2024 to Sep 30, 2024
Revised Total Coliform Rule	Resolved	Apr 1, 2024 to Apr 30, 2024
TTHMHealth-based	Archived	Apr 1, 2024 to Jun 30, 2024
TTHMHealth-based	Archived	Jan 1, 2024 to Mar 31, 2024
TTHMHealth-based	Archived	Oct 1, 2023 to Dec 31, 2023
Lead and Copper Rule	Resolved	Oct 1, 2021 to Sep 27, 2022
Consumer Confidence Rule	Resolved	Oct 1, 2021 to Jul 8, 2022
Consumer Confidence Rule	Resolved	Jul 1, 2021 to Jul 8, 2022

Mount Pleasant Estates

MT0000644 · Groundwater · 45 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: 0.003 mg/L
Action level: 0.015 mg/L

20% 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: 1.4 mg/L
Action level: 1.3 mg/L

108% of the listed benchmark

Monitoring period: Jan 1, 2000 to Dec 31, 2000

Violation history (3)

Imported violation history for Mount Pleasant Estates
Rule	Status	Period
Lead and Copper Rule	Resolved	Dec 30, 2024 to Feb 4, 2025
Lead and Copper Rule	Resolved	Oct 1, 2024 to Nov 7, 2024
Consumer Confidence Rule	Resolved	Jul 1, 2021 to Sep 2, 2021

Hardness meter

What does nearby environmental evidence show?

Very Hard

488

PPM as CaCO₃

Very Hard

PPM

488

GPG

28.5

Regional environmental evidence

USGS hardness classification scale

488 PPM

Soft
0–60Moderate
61–120Hard
121–180Very hard
181+

Parts per million

488

mg/L as CaCO₃ equivalent

Grains per gallon

28.5

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

Nearest site

11.4 mi

Observation range

Jul 17, 2018–Jul 19, 2018

Regional evidence confidence

Low

Median of the latest source-type-aligned hardness observation at each monitoring site within 25 miles. Nearest monitoring location: 22N58E08ABBA01 (Well).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 59270 typical?

These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.

Sidney median

488 PPM

About the same

1 indexed ZIP readings · Range 488–488 PPM

Montana median

94 PPM

394 PPM higher

22 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

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

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 →

Frequently asked

Water questions for Sidney

Is tap water safe in Sidney?+

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.