Skip to content

City water profile

Grafton water quality

Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Grafton, Massachusetts.

Median indexed hardness

54PPM

2 indexed ZIPs

Range 41.7–66.1 PPM

State comparison
5 PPM above
State hardness rank
#144 of 302
Matched utilities
4
Active health records
0

City summary

What the indexed records say

Grafton has 2 published ZIP profiles across Worcester County. The indexed median is 54 PPM, compared with 49 PPM across Massachusetts.

Among the 302 Massachusettscities with an indexed median, Grafton ranks #144from highest to lowest. Across all 328 state ZIP profiles, available estimates run from 24.3to 128 PPM.

The 41.7–66.1 PPM range shows how much the available ZIP estimates vary within the city label.

Hardness distribution

How local ZIP estimates compare

Soft1 ZIP
Moderately hard1 ZIP
Hard0 ZIPs
Very hard0 ZIPs

2 of 2 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance
6.8 miles
Profiles with evidence
2/2

Confidence labels

High: 0Moderate: 2Low: 0

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

ZIP directory

Water reports in Grafton

Open a ZIP for site-level provenance and measurements.

ZIP code

01519

Moderately Hard

66.1 PPM

Nearest site
6.8 mi
Confidence
Moderate

View full ZIP evidence →

ZIP code

01560

Soft

41.7 PPM

Nearest site
5.5 mi
Confidence
Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

Grafton Water District

PWSID MA2110000

Groundwater
System population served
10,925
Last reported
Jun 22, 2026

EPA SDWIS explicitly lists this ZIP in the system's served geography.

Laurel Hill Condominiums

PWSID MA2110006

Groundwater
System population served
64
Last reported
Jun 22, 2026

EPA SDWIS explicitly lists this ZIP in the system's served geography.

Countryside Condominium

PWSID MA2110004

Groundwater
System population served
30
Last reported
Jun 22, 2026

EPA SDWIS explicitly lists this ZIP in the system's served geography.

South Grafton Water District

PWSID MA2110001

Groundwater influenced by surface water
System population served
3,262
Last reported
Jun 22, 2026

EPA SDWIS explicitly lists this ZIP in the system's served geography.

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
Lead and Copper RuleMA2110001Jun 1, 2025Addressed
Consumer Confidence RuleMA2110001Jul 1, 2024Addressed
Groundwater RuleMA2110000Jul 22, 2023Resolved
Revised Total Coliform RuleMA2110004May 1, 2023Resolved
Groundwater RuleMA2110000Apr 3, 2023Resolved
NitrateMA2110000Apr 1, 2023Resolved
BenzeneMA2110000Apr 1, 2023Resolved
1,1-DichloroethyleneMA2110000Apr 1, 2023Resolved
TrichloroethyleneMA2110000Apr 1, 2023Resolved
CHLOROBENZENEMA2110000Apr 1, 2023Resolved

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 Grafton

Is the water hard?

The indexed city median is 54 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.