City water profile

Water hardness in Colebrook

Find official utility reports, understand hardness, and check the water system serving your home in Colebrook, New Hampshire.

Utility-reported hardness

Not yet available

Check your provider and source →

State comparison: Unavailable
Evidence comparison rank: —
Matched utilities: 1
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.

Colebrook Water Works

NH0481010 · Groundwater · 1,300 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

Above action level

Reported level: 0.031 mg/L
Action level: 0.015 mg/L

207% of the listed benchmark

Monitoring period: Jan 1, 2007 to Dec 31, 2009

Violation history (9)

Imported violation history for Colebrook Water Works
Rule	Status	Period
Revised Total Coliform Rule	Resolved	Sep 11, 2025 to Sep 23, 2025
Revised Total Coliform Rule	Resolved	Aug 1, 2025 to Sep 1, 2025
E. COLI	Resolved	Dec 10, 2022 to Dec 22, 2022
TTHM	Resolved	Jul 1, 2021 to Oct 1, 2021
Total Haloacetic Acids (HAA5)	Resolved	Jul 1, 2021 to Oct 1, 2021
Public Notice	Unaddressed	Dec 6, 2015
Public Notice	Unaddressed	Dec 6, 2015
Public Notice	Unaddressed	Feb 19, 2008
Public Notice	Unaddressed	Feb 19, 2008

City summary

What the indexed records say

Colebrook has 1 published ZIP profile across Coos County. The regional-evidence median is 46 PPM. The city does not meet the stricter comparison standard.

Because only one ZIP is represented, the city median and range are the same local estimate. It should not be read as multiple independent samples across the community. At least one estimate is marked low confidence, so observation distance and date deserve extra attention.

Hardness distribution

How local ZIP estimates compare

Soft1 ZIP

Moderately hard0 ZIPs

Hard0 ZIPs

Very hard0 ZIPs

1 of 1 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance: 8.9 miles
Profiles with evidence: 1/1

Confidence labels

High: 0Moderate: 0Low: 1

Observation window: Jul 17, 2017 to Jul 17, 2017.

ZIP directory

Water reports in Colebrook

Open a ZIP for site-level provenance and measurements.

ZIP code

03576

Soft

45.6 PPM

Nearest site: 8.9 mi
Confidence: Low

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 New Hampshire communities

Berlin

Coos County

3 PPM median

Gorham

Coos County

3 PPM median

Groveton

Coos County

43 PPM median

Whitefield

Coos County

43 PPM median

Lancaster

Coos County

— No median

Hinsdale

Cheshire County

44 PPM median

Search all 74 New Hampshire cities →

Questions people ask

About water in Colebrook

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.