Does Summerville, SC tap water have any EPA-reported violations?

As of June 2026, EPA SDWIS records show 77 violation(s) across the community water systems serving Summerville, of which 47 are classified by the EPA as health-based. Most older violations have returned to compliance; see the per-system list.

Where does Summerville, SC tap water come from?

Summerville is served by 15 active community water system(s). Their primary sources, per EPA records, are: surface water, groundwater.

SC / Summerville

SC · Tap water records

Summerville tap water, in plain English

Here is what the EPA's own data shows about tap water in Summerville. According to EPA SDWIS data retrieved June 2026, Summerville is served by 15 active community water systems, together reported to serve about 155,490 people.

As of June 2026, EPA records show 77 violations across the community water system(s) serving Summerville, going back to the earliest EPA record. 47 of these are classified by the EPA as health-based (a contaminant recorded above the limit the EPA tracks); the rest are monitoring or reporting violations. Each is listed by system below, with its status.

15

Community water systems
~155,490

People served (EPA-reported)
June 2026

EPA records reviewed through

What the EPA has on record, by system

Summerville Cpw (Sc1810003)

81,750 served · surface water · PWSID SC1810003

As of June 2026, EPA records show no reported violations for this system in the period covered. This is not a guarantee about every substance, or about the water inside your home's plumbing.

Dcwa Knightsville (Sc1820001)

40,141 served · surface water · PWSID SC1820001

Monitoring E. COLI: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded once in May 2010. All have since returned to compliance, per EPA records.

Dcws Ashley Phosphate (Sc1820008)

26,536 served · surface water · PWSID SC1820008

Monitoring TTHM: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 5 times in October 2022. EPA records do not show all of these as returned to compliance.
Monitoring Total Haloacetic Acids (HAA5): a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 5 times in October 2022. EPA records do not show all of these as returned to compliance.

Dcws/Clay Field Drive (Sc1850014)

1,648 served · surface water · PWSID SC1850014

As of June 2026, EPA records show no reported violations for this system in the period covered. This is not a guarantee about every substance, or about the water inside your home's plumbing.

Dcws Southern Palms (Sc1850011)

1,494 served · surface water · PWSID SC1850011

As of June 2026, EPA records show no reported violations for this system in the period covered. This is not a guarantee about every substance, or about the water inside your home's plumbing.

Dcws Edisto Tribal Council (1850010)

925 served · groundwater · PWSID SC1850010

As of June 2026, EPA records show no reported violations for this system in the period covered. This is not a guarantee about every substance, or about the water inside your home's plumbing.

Homecoming Subdivision (Sc1850016)

883 served · surface water · PWSID SC1850016

As of June 2026, EPA records show no reported violations for this system in the period covered. This is not a guarantee about every substance, or about the water inside your home's plumbing.

Dcwa Tranquil Acres (Sc1820003)

858 served · surface water · PWSID SC1820003

As of June 2026, EPA records show no reported violations for this system in the period covered. This is not a guarantee about every substance, or about the water inside your home's plumbing.

Dcws Reevesville (Sc1820002)

300 served · groundwater · PWSID SC1820002

As of June 2026, EPA records show no reported violations for this system in the period covered. This is not a guarantee about every substance, or about the water inside your home's plumbing.

Dcwa Calomet Valley (1850009)

275 served · surface water · PWSID SC1850009

As of June 2026, EPA records show no reported violations for this system in the period covered. This is not a guarantee about every substance, or about the water inside your home's plumbing.

Heron'S Walk Phase 1 (Sc1850017)

231 served · surface water · PWSID SC1850017

As of June 2026, EPA records show no reported violations for this system in the period covered. This is not a guarantee about every substance, or about the water inside your home's plumbing.

Dcws Caleb Court (Sc1850015)

156 served · surface water · PWSID SC1850015

As of June 2026, EPA records show no reported violations for this system in the period covered. This is not a guarantee about every substance, or about the water inside your home's plumbing.

Dcws Conoflow (Sc1820007)

150 served · groundwater · PWSID SC1820007

Monitoring TTHM: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 4 times between January 2020 and April 2020. All have since returned to compliance, per EPA records.
Monitoring Total Haloacetic Acids (HAA5): a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 4 times between January 2020 and April 2020. All have since returned to compliance, per EPA records.

Dcws I-95 (Sc1870914)

102 served · groundwater · PWSID SC1870914

Health-based TTHM: a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded 8 times between January 2021 and October 2021. The EPA record lists a level of 0.1 MG/L; the limit (MCL) is 0.08 MG/L. All have since returned to compliance, per EPA records.

Sandy Run Mhp (Sc0860037)

41 served · groundwater · PWSID SC0860037

Health-based Gross Alpha, Excl. Radon and U: a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded 39 times between January 2019 and January 2024. The EPA record lists a level of 20 PCI/L; the limit (MCL) is 15 PCI/L. EPA records do not show all of these as returned to compliance.
Monitoring Lead and Copper Rule: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 3 times between October 1998 and July 2020. All have since returned to compliance, per EPA records.
Monitoring Revised Total Coliform Rule: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded once in April 2017. All have since returned to compliance, per EPA records.
Monitoring Consumer Confidence Rule: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 7 times between July 2000 and July 2005. All have since returned to compliance, per EPA records.

What this means

A health-based violation means a contaminant was recorded above the limit the EPA tracks for it. A monitoring or reporting violation means a required test or report was late or missed — not that a contaminant was measured above a limit. “Returned to compliance” means the EPA recorded the issue as resolved.

This page summarizes the EPA's own records and does not assess whether your water is safe to drink. For the most current details, you can verify every record directly with the EPA, and contact your water system with questions.

Source: U.S. EPA Envirofacts SDWIS, retrieved June 2026. Records cover the EPA's full reporting history for these systems. Verify at EPA ECHO.