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City water profile

Hopkinton water quality

Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Hopkinton, Rhode Island.

Median indexed hardness

64PPM

One indexed ZIP

Range 64.1–64.1 PPM

State comparison
21 PPM above
State hardness rank
#1 of 12
Matched utilities
5
Active health records
2

City summary

What the indexed records say

Hopkinton has 1 published ZIP profile across Washington County. The indexed median is 64 PPM, compared with 43 PPM across Rhode Island.

Among the 12 Rhode Islandcities with an indexed median, Hopkinton ranks #1from highest to lowest. Across all 33 state ZIP profiles, available estimates run from 40.5to 64.1 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
5.9 miles
Profiles with evidence
1/1

Confidence labels

High: 0Moderate: 1Low: 0

Observation window: May 11, 2016 to Dec 2, 2025.

ZIP directory

Water reports in Hopkinton

Open a ZIP for site-level provenance and measurements.

ZIP code

02833

Moderately Hard

64.1 PPM

Nearest site
5.9 mi
Confidence
Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

Lindhbrook Water Company

PWSID RI1000098

Groundwater
System population served
200
Last reported
May 26, 2026

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

Bethel Village Water Assn

PWSID RI1000045

Groundwater
System population served
180
Last reported
May 26, 2026

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

Canonchet Cliffs Water Association Inc.

PWSID RI1900053

Groundwater
System population served
154
Last reported
May 26, 2026

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

Hopkinton, Town Of

PWSID RI2980473

Groundwater
System population served
125
Last reported
May 26, 2026

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

Saugatucket Springs

PWSID RI2980423

Groundwater
System population served
110
Last reported
May 26, 2026

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

Compliance history

What EPA records show

2 unique active health-based records appear among associated systems. This does not mean every contaminant was tested at every tap.

RecordSystemPeriodStatus
Lead and Copper RuleRI1000045Jan 1, 2026Unaddressed
Lead and Copper RuleRI1000045Sep 29, 2025Unaddressed
Consumer Confidence RuleRI1000045Jul 1, 2025Resolved
Consumer Confidence RuleRI2980473Jul 1, 2025Resolved
Revised Total Coliform RuleRI1000098Jan 1, 2025Archived
Lead and Copper RuleRI1000045Jan 1, 2025Resolved
Revised Total Coliform RuleRI1000045Jan 1, 2025Resolved
Lead and Copper RuleRI1000098Nov 18, 2024Unaddressed · health-based
Lead and Copper RuleRI1000045Oct 1, 2024Addressed
Lead and Copper RuleRI1000098Sep 28, 2024Unaddressed

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 Hopkinton

Is the water hard?

The indexed city median is 64 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.