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City water profile

Exeter water quality

Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Exeter, New Hampshire.

Median indexed hardness

62PPM

One indexed ZIP

Range 61.6–61.6 PPM

State comparison
4 PPM above
State hardness rank
#34 of 74
Matched utilities
8
Active health records
0

City summary

What the indexed records say

Exeter has 1 published ZIP profile across Rockingham County. The indexed median is 62 PPM, compared with 58 PPM across New Hampshire.

Among the 74 New Hampshirecities with an indexed median, Exeter ranks #34from highest to lowest. Across all 90 state ZIP profiles, available estimates run from 16to 102 PPM.

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.

Hardness distribution

How local ZIP estimates compare

Soft0 ZIPs
Moderately hard1 ZIP
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: 1Low: 0

Observation window: Jan 4, 2016 to Jun 8, 2026.

ZIP directory

Water reports in Exeter

Open a ZIP for site-level provenance and measurements.

ZIP code

03833

Moderately Hard

61.6 PPM

Nearest site
8.9 mi
Confidence
Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

Exeter Water Dept

PWSID NH0801010

Surface water
System population served
12,236
Last reported
Jun 23, 2026

The system names this served city; Census place overlap links the city to this ZCTA.

Exeter River Mobile Home Park

PWSID NH0803020

Groundwater
System population served
980
Last reported
Jun 23, 2026

The system names this served city; Census place overlap links the city to this ZCTA.

River Run

PWSID NH0803030

Groundwater
System population served
411
Last reported
Jun 23, 2026

The system names this served city; Census place overlap links the city to this ZCTA.

Forest Ridge

PWSID NH0802040

Groundwater
System population served
140
Last reported
Jun 23, 2026

The system names this served city; Census place overlap links the city to this ZCTA.

Beech Tree Cooperative

PWSID NH0803040

Groundwater
System population served
70
Last reported
Jun 23, 2026

The system names this served city; Census place overlap links the city to this ZCTA.

Louisburg Circle

PWSID NH0802030

Groundwater
System population served
55
Last reported
Jun 23, 2026

The system names this served city; Census place overlap links the city to this ZCTA.

Exeter Highlands

PWSID NH0802020

Groundwater
System population served
50
Last reported
Jun 23, 2026

The system names this served city; Census place overlap links the city to this ZCTA.

Pickpocket Woods

PWSID NH0802010

Groundwater
System population served
26
Last reported
Jun 23, 2026

The system names this served city; Census place overlap links the city to this ZCTA.

Compliance history

What EPA records show

No active health-based violation appears among the associated systems in the represented EPA reporting quarter. This does not mean every contaminant was tested at every tap.

RecordSystemPeriodStatus
Revised Total Coliform RuleNH0802010Mar 11, 2026Unaddressed
Revised Total Coliform RuleNH0802010Jan 1, 2026Archived
TTHMNH0801010Oct 1, 2025Archived · health-based
Lead and Copper RuleNH0802010May 30, 2025Resolved · health-based
NitrateNH0802020Jan 1, 2022Resolved
Revised Total Coliform RuleNH0802010Mar 1, 2021Resolved
Revised Total Coliform RuleNH0802010Mar 1, 2021Resolved
Public NoticeNH0801010Jan 4, 2015Unaddressed

Practical next steps

Move from index to evidence

  1. 1. Open your ZIP. Check distance, dates, confidence, and the associated utility.
  2. 2. Read the current CCR. Confirm source water, detections, limits, ranges, and notices.
  3. 3. Test the tap when needed. Confirm health concerns or treatment sizing with the right method.

Questions people ask

About water in Exeter

Is the water hard?

The indexed city median is 62 PPM. Open the ZIP report to verify the distance and confidence behind that estimate.

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.