Skip to content

Local water dashboard

Official source aggregation

Water quality in Canaan, NH 03741

A source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Grafton County.

4 reported benchmark flags
Primary matched system
Canaan Water Dept
Source water
Surface water + Groundwater
County
Grafton County
Profile updated

At a glance

What the current records say

Hardness

Soft

24 PPM · 1.4 GPG

Compliance screen

No active flag

0 active health-based records

Lead 90th percentile

0.016 mg/L

107% of action level

Utility match

4 systems

Serves 684 people system-wide

Hardness meter

How hard is the water?

Soft

Estimated local hardness

USGS hardness classification scale

24 PPM

Soft
0–59Moderate
60–120Hard
121–180Very hard
181+

Parts per million

24

mg/L as CaCO₃ equivalent

Grains per gallon

1.4

1 GPG ≈ 17.1 PPM

What this means at home

At 24 PPM, mineral scale can build up on fixtures and heating elements, reduce soap lather, and leave visible spotting. Hardness is primarily an aesthetic and appliance concern—not itself a tap-water safety rating.

USGS sites used

8

Nearest site

40.6 mi

Observation range

Jan 20, 2016–Mar 17, 2026

Estimate confidence

Low

Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: COLD RIVER AT HIGH STREET, AT ALSTEAD, NH (Stream).USGS source documentation ↗

Regional context

Is 03741 typical?

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

Canaan median

24 PPM

About the same

1 indexed ZIP readings · Range 24–24 PPM

New Hampshire median

58 PPM

34 PPM lower

90 indexed ZIP readings · Range 16–102 PPM

EPA benchmark screen

Contaminant snapshot

Available numerical results from associated SDWIS community water systems, compared with the applicable action level or federal MCL. Federal measured-value coverage is incomplete.

0 pass4 fail

Lead (PB90)

0.016 mg/L

Reported Dec 31, 2016

Copper (CU90)

3.25 mg/L

Reported Dec 31, 2004

Numerical coverage

4 comparable results

Missing values remain blank; absence is not treated as a pass.

Lead (90th percentile)

Measured in mg/L

Fail

Local 0.016

EPA limit 0.015

Local level is 107% of the listed EPA limit.

Copper (90th percentile)

Measured in mg/L

Fail

Local 3.25

EPA limit 1.3

Local level is 250% of the listed EPA limit.

Combined Radium (-226 and -228)

Measured in PCI/L

Fail

Local 6

EPA limit 5

Local level is 120% of the listed EPA limit.

TTHM

Measured in MG/L

Fail

Local 0.084

EPA limit 0.08

Local level is 105% of the listed EPA limit.

Share of EPA benchmark

100% line = listed limit

EPA SDWIS compliance

Reported violation history

Open EPA source documentation ↗
2026Q2
All records
28
Health-based
4
Active health-based
0
Contaminant or ruleSystemStatusPeriod
Lead and Copper RuleNH0351010ResolvedJan 1, 2026through Jan 31, 2026
Lead and Copper RuleNH0353020ResolvedJan 1, 2026through Feb 27, 2025
Combined Radium (-226 and -228)Health-basedReported 6 PCI/L · MCL 5NH0353010ArchivedJan 1, 2026through Mar 31, 2026
TTHMNH0354010ResolvedJul 1, 2025through Oct 1, 2025
Total Haloacetic Acids (HAA5)NH0354010ResolvedJul 1, 2025through Oct 1, 2025
TTHMNH0354010ResolvedJan 1, 2025through Apr 1, 2025
Total Haloacetic Acids (HAA5)NH0354010ResolvedJan 1, 2025through Apr 1, 2025
TTHMNH0351010ResolvedOct 1, 2024through Jan 1, 2025
Total Haloacetic Acids (HAA5)NH0351010ResolvedOct 1, 2024through Jan 1, 2025
Lead and Copper RuleNH0354010ResolvedOct 1, 2024through Oct 16, 2024
Revised Total Coliform RuleNH0351010ResolvedAug 15, 2024through Sep 3, 2024
Revised Total Coliform RuleNH0351010ResolvedJul 1, 2024through Aug 1, 2024
Combined Radium (-226 and -228)Health-basedReported 6 PCI/L · MCL 5NH0353010ResolvedJul 1, 2023through Sep 30, 2023
Combined Radium (-226 and -228)Health-basedReported 6 PCI/L · MCL 5NH0353010ResolvedApr 1, 2023through Jun 30, 2023
Public NoticeNH0351010UnaddressedMar 2, 2023
Public NoticeNH0351010UnaddressedMar 2, 2023
Public NoticeNH0351010ResolvedOct 19, 2022through Nov 22, 2022
Public NoticeNH0351010ResolvedOct 19, 2022through Nov 22, 2022
Lead and Copper RuleNH0351010ResolvedOct 1, 2022through Nov 17, 2022
TTHMNH0351010ResolvedOct 1, 2022through Jan 1, 2023

No reported violation does not prove that every contaminant was tested or absent; SDWIS measured values are incomplete and lag state records.

Solutions matcher

Your personalized water action plan

Matched to Canaan ZIP 03741 using 24 PPM nearby hardness and 4 reported measurement benchmarks.

1 match

Drinking water protection

Under-Sink Reverse Osmosis System

Lead (90th percentile), Copper (90th percentile), Combined Radium (-226 and -228), TTHM have a measured benchmark flag or active health-based SDWIS record in this profile.

A certified multi-stage RO system targets a broader range of dissolved contaminants at the kitchen tap.

Explore under-sink filtration

Affiliate disclosure: we may earn a commission from qualifying purchases, at no added cost to you. Product matching is educational and does not replace certified water testing.

Frequently asked

Water questions for Canaan

Is tap water safe in Canaan?+

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?+

Nearby USGS observations produce an estimate of 24 PPM, or 1.4 grains per gallon, classified as soft. This is not a household tap measurement.

Do I need a water softener?+

There is no high-hardness trigger in this profile. Confirm with a tap test before buying equipment.