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Castlewood S/D

What EPA’s and CDC’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
46 people
Connections
18
Water source
Groundwater
Based in
Gastonia, NC
County
Gaston
Owner
Private
The ZIP code it serves

28056

The short answer

1 result is above EPA’s legal limit. The worst: Copper, above the action level. 1 health-based violation since 2016.

What handles it

What was found

Lead and copper: EPA SDWIS monitoring periods ending 2025.

Haloacetic acids (HAA5), arsenic, nitrate and total trihalomethanes (TTHM): North Carolina’s yearly averages per water system, as CDC’s Environmental Public Health Tracking Network publishes them, 2020 to 2023.

Fluoride, chromium (total) and uranium: EPA’s compliance monitoring file, samples taken from May 15, 2012 to Feb. 11, 2019. Newer results are in the utility’s annual water quality report.

Above the legal limit1

Copper

Comes from pipes, often your own

Above the action level

1.7ppm

90th percentile, 2023 to 2025

In the latest period, 9 in 10 homes sampled were at or below 1.7 ppm, above EPA’s action level of 1.3 ppm.

What handles it

Below EPA’s limits2

Fluoride

Forms or is added in treatment

Below EPA’s limits

0.16ppm

Highest yearly average, 2012 to 2018

2018, one sample: 0.12 ppm

Averaged by year, the highest was 0.16 ppm, in 2015, below EPA’s legal limit of 4.0 ppm. In 2018, the latest year on file, its one sample was 0.12 ppm.

What handles it

Haloacetic acids (HAA5)

Forms or is added in treatment

Below EPA’s limits

1.2ppb

Highest yearly average, 2022

Averaged by year, the highest was 1.2 ppb, in 2022, below EPA’s legal limit of 60 ppb. That is the only year on file.

What handles it

No certification claim covers this compound yet.

6 compounds tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.
  • Arsenic
  • Chromium (total)
  • Lead
  • Nitrate
  • Total trihalomethanes (TTHM)
  • Uranium

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

Violations since 2016

Contaminant or ruleTypePeriodMeasuredStatus
Lead and Copper RuleA required study or plan for corrosion control was not done on time.EPA: OCCT/SOWT Study/RecommendationJan. 1, 2023—Resolved
Health-based violations only. Resolved and archived mean the utility returned to compliance or the state closed the record. 7 monitoring or reporting violations not shown.

What this report can’t tell you

  • Everything else. Haloacetic acids (HAA5), arsenic, nitrate and total trihalomethanes (TTHM) results here are North Carolina’s yearly averages as CDC publishes them, from 2020 on, with EPA’s national file for 2012 to 2019. Fluoride, chromium (total) and uranium come from EPA’s file alone, which ends in 2019. Castlewood S/D’s own annual report, which it must send you every year, has newer results for those and 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; CDC’s yearly averages for North Carolina cover 2020 to 2023; EPA’s compliance samples are from May 15, 2012 to Feb. 11, 2019.

Testing your own tap

Castlewood S/D’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 North Carolina certifies.

The 3 labs North Carolina certifies closest to the area Castlewood S/D serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • Gaston County Health Dept.

    Gastonia, NC · about 6 miles

    Certified for bacteria

    (704) 853-5200

  • Chem-Bac Labs, Inc.

    Charlotte, NC · about 12 miles

    Certified for bacteria

    (704) 394-6381

  • Charlotte Water - Environmental Lab Services

    Charlotte, NC · about 13 miles

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

    (704) 336-3690

All 112 certified labs for North Carolina

Sources

PWSID NC0136345. Rebuilt from EPA data on Oct. 18, 2026.

Also in Gaston County

All North Carolina utilities

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