Twin Lake Farm 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: 208 people
Connections: 82
Water source: Groundwater
Based in: Holly Springs, NC
County: Wake
Owner: Private

The short answer

Nothing in EPA’s and CDC’s records for this utility is above a health goal. That covers nitrate, arsenic and other regulated chemicals, plus lead and copper, not everything. No health-based violations on file since 2016.

What was found

Arsenic, haloacetic acids (HAA5), 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 Oct. 28, 2013 to Dec. 11, 2019. Newer results are in the utility’s annual water quality report.

Below EPA’s limits1

Fluoride

Forms or is added in treatment

Below EPA’s limits

0.47ppm

Highest yearly average, 2013 to 2019

Averaged by year, the highest was 0.47 ppm, in 2019, below EPA’s legal limit of 4.0 ppm. That was also the latest year on file.

What handles it

NSF/ANSI 58 look for “Fluoride Reduction”
NSF/ANSI 53 look for “Fluoride”

7 compounds tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.

Arsenic
Chromium (total)
Haloacetic acids (HAA5)
Lead
Nitrate
Total trihalomethanes (TTHM)
Uranium

Violations since 2016

No health-based violations on file with EPA since 2016. There are 2 monitoring or reporting violations: a sample missed, late or not reported.

What this report can’t tell you

Everything else. Arsenic, haloacetic acids (HAA5), 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. Twin Lake Farm 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 Oct. 28, 2013 to Dec. 11, 2019.

Testing your own tap

Twin Lake Farm 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.

No lab North Carolina certifies is within 75 miles of the area Twin Lake Farm S/D serves on the state’s list. Some take samples by mail; the state’s page lists them all.

All 112 certified labs for North Carolina

Sources

EPA UCMR 5 occurrence data, file of Oct. 15, 2026
EPA SDWA bulk download (SDWIS federal data), 2026 Q3
CDC Environmental Public Health Tracking Network, yearly averages North Carolina supplied to CDC, 2020 to 2023, read Oct. 8, 2026. TapBuff’s comparisons with EPA’s limits are its own, not CDC’s or North Carolina’s.
EPA Six-Year Review 4 compliance monitoring data, 2012 to 2019, file of Feb. 5, 2024
Limits and goals: each contaminant’s page, with its EPA source.
How this page is built: methodology.

PWSID NC0392395. Rebuilt from EPA data on Oct. 18, 2026.

Also in Wake County

All North Carolina utilities