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Stones Throw Condos

What EPA’s and Massachusetts’s records show in this utility’s water: nitrate, arsenic and other regulated chemicals; lead and copper; and violations since 2016, with the certification that handles each result.

Serves
80 people
Connections
27
Water source
Groundwater
Based in
Truro, MA
County
Barnstable
Owner
Private
Hardness
Moderately hard
The ZIP code it serves

02652

The short answer

1 result is above EPA’s legal limit. The worst: Copper, above the action level. No health-based violations on file since 2016.

What handles it

What was found

Lead and copper: EPA SDWIS monitoring periods ending 2009 to 2021.

Nitrate, arsenic, chromium (total) and fluoride: Massachusetts’s own results, samples taken from Sept. 2, 2020 to Aug. 19, 2026, with EPA’s 2012 to 2019 file for earlier years.

Above the legal limit1

Copper

Comes from pipes, often your own

Above the action level

2.7ppm

90th percentile, 2021

In the latest period, 9 in 10 homes sampled were at or below 2.7 ppm, above EPA’s action level of 1.3 ppm.

What handles it

Below EPA’s limits1

Nitrate

Comes from the source

Below EPA’s limits

4.0ppm

Highest sample; found in 8 of 8

2026, one sample: 3.0 ppm

The highest sample, in 2023, was 4.0 ppm, below EPA’s legal limit of 10 ppm. In 2026, the latest year on file, its one sample was 3.0 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 3.3 ppm, in 2019.

What handles it

  • NSF/ANSI 58 look for “Nitrate/Nitrite Reduction”
  • NSF/ANSI 53 look for “Nitrate/Nitrite (30 ppm challenge)”
4 compounds tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.
  • Arsenic
  • Chromium (total)
  • Fluoride
  • Lead

What handles it

A certification covers specific claims, not a whole standard. Look for these claims on the certifier’s listing, not the box. Wording varies a little: NSF writes “Lead Reduction,” WQA just “Lead.”

At the tap, or for the whole house?

Lead and copper usually come from pipes and fixtures inside or near your home. A whole-house system sits where water enters, so it cannot catch what your own plumbing adds after it. For those, the filter that counts is the one at the tap. How whole-house systems compare.

Filters with those claims on a certifier’s listing

Disclosure: TapBuff earns a commission if you buy through some links on this page. It does not change which standard or filter we name. As an Amazon Associate, TapBuff earns from qualifying purchases. How TapBuff makes money

Compare five-year costs

Hardness

Moderately hard, 83 mg/L (4.9 grains per gallon), at its one sampling point, in 2024.

Hardness is calcium and magnesium. EPA sets no limit for it: it shows up as scale on fixtures and in water heaters, and as soap that won’t lather. USGS calls water above 60 mg/L moderately hard, above 120 hard and above 180 very hard.

Softeners compared at 4.9 grains per gallon, salt includedSoftener or salt-free conditioner?Massachusetts water hardness, utility by utility

Violations since 2016

No health-based violations on file with EPA since 2016. There are 4 monitoring or reporting violations: a sample missed, late or not reported.

What this report can’t tell you

  • Everything else. Nitrate, arsenic, chromium (total) and fluoride results here are Massachusetts’s own from 2020 on, with EPA’s national file for 2012 to 2019. Stones Throw Condos’s own annual report, which it must send you every year, has the contaminants this page does not show.

  • Your own plumbing. Lead results are the 90th percentile across homes the utility samples. Your home’s service line, solder and fixtures decide yours. A certified lab test is the only way to know.

  • What it means for your health. This page reports what the records show and EPA’s limits and goals; it is not medical advice. If you are worried about a health effect, talk to a doctor or your local health department.

  • Anything after the latest data. SDWIS data is from 2026 Q3; UCMR 5 didn’t sample this utility; Massachusetts’s results run from Sept. 2, 2020 to Aug. 19, 2026.

Testing your own tap

Stones Throw Condos’s results are for the water it sends out. What your own service line, solder and fixtures add shows up only in a test of your tap, by a lab Massachusetts certifies.

The 3 labs Massachusetts certifies closest to the area Stones Throw Condos serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • Barnstable County Health & Env Dept

    Barnstable, MA · about 26 miles

    Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, PFAS

    (508) 375-6605

  • Envirotech Laboratories Inc.

    Sandwich, MA · about 30 miles

    Certified for bacteria, nitrate, minerals and other inorganics

    (508) 888-6460

  • Battelle Memorial Institute

    Norwell, MA · about 38 miles

    Certified for PFAS

    (781) 681-6635

All 81 certified labs for Massachusetts

Sources

PWSID MA4300040. Rebuilt from EPA data on Oct. 18, 2026.

Also in Barnstable County

All Massachusetts utilities

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