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Community Water System · PWS SC0410010

Williamston Town of (0410010)

Williamston, South Carolina 29697 - drinking water served from surface water sources to 6,693 people, tracked in EPA SDWIS and UCMR5.

6,693
People served
43
EPA violations
23
Health-based
1 PFAS
UCMR5 result

The verdict

EPA records 43 drinking-water violations at Williamston Town of (0410010), 53% of them health-based - above the South Carolina per-system average, and UCMR5 testing detected 1 PFAS compound.

43
Total EPA violations on record
53%
Health-based (MCL / treatment failure)
6,693
People served by this system
1
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Williamston Town of (0410010)

Williamston Town of (0410010) is a local-owned community water system that delivers drinking water to 6,693 residents in Williamston, South Carolina (Anderson County) through 2,582 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 43 total violations for this system , of which 23 (53%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 17 monitoring and reporting violations are on file. The most recent violation on record dates to 2001.

The most frequently cited contaminant at this system is TTHM, recorded in 16 violations (MCL, health-based). Under EPA's UCMR5 PFAS monitoring program, 1 PFAS compound was detected in samples collected from this system, with a maximum reported concentration of 3.4 ppt (parts per trillion). PFAS are persistent synthetic chemicals linked to health effects at very low exposure levels.

Across South Carolina, EPA tracks 1,390 public water systems serving 4,709,324 people, with 38,355 cumulative violations and 9,705 health-based violations on record. About 65% of systems in the state carry at least one violation, and state-wide the average per system is 27.6 violations. Statewide, 107 of 164 UCMR5-tested systems have reported PFAS detections (65.2%).

Williamston Town of (0410010)'s 43 violations sit above the South Carolina average.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

PFAS Detected

1 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.

Population Served
6,693
Total Violations
43
Health-Based Violations
23
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
2,582
County
Anderson
School/Daycare
No
MCL Violations
18
Monitoring Violations
17
Treatment Tech Violations
5

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
TTHM MCL 16 1996
Surface Water Treatment Rule TT 5 1996
Nitrate MR 4 1993
Coliform (TCR) MR 4 2001
Chromium MR 2 1993
Barium MR 2 1993
Cadmium MR 2 1993
Selenium MR 2 1993
Coliform (TCR) MCL 2 2000
Mercury MR 1 1993

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 2 of 116 samples detected PFAS.

Contaminant Date Result MRL Status
PFPeS 7/16/2024 <4.00 ppt 4.00 ppt Not Detected
PFMPA 7/16/2024 <4.00 ppt 4.00 ppt Not Detected
PFPeA 7/16/2024 <3.00 ppt 3.00 ppt Not Detected
PFMBA 7/16/2024 <3.00 ppt 3.00 ppt Not Detected
PFEESA 7/16/2024 <3.00 ppt 3.00 ppt Not Detected
NFDHA 7/16/2024 <20.00 ppt 20.00 ppt Not Detected
PFNA 7/16/2024 <4.00 ppt 4.00 ppt Not Detected
PFUnA 7/16/2024 <2.00 ppt 2.00 ppt Not Detected
11Cl-PF3OUdS 7/16/2024 <5.00 ppt 5.00 ppt Not Detected
9Cl-PF3ONS 7/16/2024 <2.00 ppt 2.00 ppt Not Detected
ADONA 7/16/2024 <3.00 ppt 3.00 ppt Not Detected
HFPO-DA 7/16/2024 <5.00 ppt 5.00 ppt Not Detected
PFBA 7/16/2024 <5.00 ppt 5.00 ppt Not Detected
6:2 FTS 7/16/2024 <5.00 ppt 5.00 ppt Not Detected
NEtFOSAA 7/16/2024 <5.00 ppt 5.00 ppt Not Detected
PFHxA 7/16/2024 <3.00 ppt 3.00 ppt Not Detected
PFTA 7/16/2024 <8.00 ppt 8.00 ppt Not Detected
PFTrDA 7/16/2024 <7.00 ppt 7.00 ppt Not Detected
NMeFOSAA 7/16/2024 <6.00 ppt 6.00 ppt Not Detected
4:2 FTS 7/16/2024 <3.00 ppt 3.00 ppt Not Detected
PFBS 7/16/2024 <3.00 ppt 3.00 ppt Not Detected
8:2 FTS 7/16/2024 <5.00 ppt 5.00 ppt Not Detected
PFDoA 7/16/2024 <3.00 ppt 3.00 ppt Not Detected
PFDA 7/16/2024 <3.00 ppt 3.00 ppt Not Detected
PFOA 7/16/2024 <4.00 ppt 4.00 ppt Not Detected
PFOS 7/16/2024 <4.00 ppt 4.00 ppt Not Detected
PFHpS 7/16/2024 <3.00 ppt 3.00 ppt Not Detected
PFHxS 7/16/2024 <3.00 ppt 3.00 ppt Not Detected
PFHpA 7/16/2024 <3.00 ppt 3.00 ppt Not Detected
PFDA 4/23/2024 <3.00 ppt 3.00 ppt Not Detected
PFOA 4/23/2024 <4.00 ppt 4.00 ppt Not Detected
PFBS 4/23/2024 <3.00 ppt 3.00 ppt Not Detected
4:2 FTS 4/23/2024 <3.00 ppt 3.00 ppt Not Detected
8:2 FTS 4/23/2024 <5.00 ppt 5.00 ppt Not Detected
PFMPA 4/23/2024 <4.00 ppt 4.00 ppt Not Detected
PFHpA 4/23/2024 <3.00 ppt 3.00 ppt Not Detected
PFMBA 4/23/2024 <3.00 ppt 3.00 ppt Not Detected
PFEESA 4/23/2024 <3.00 ppt 3.00 ppt Not Detected
PFDoA 4/23/2024 <3.00 ppt 3.00 ppt Not Detected
6:2 FTS 4/23/2024 <5.00 ppt 5.00 ppt Not Detected
PFHxS 4/23/2024 <3.00 ppt 3.00 ppt Not Detected
PFNA 4/23/2024 <4.00 ppt 4.00 ppt Not Detected
PFPeA 4/23/2024 <3.00 ppt 3.00 ppt Not Detected
PFTrDA 4/23/2024 <7.00 ppt 7.00 ppt Not Detected
PFTA 4/23/2024 <8.00 ppt 8.00 ppt Not Detected
NMeFOSAA 4/23/2024 <6.00 ppt 6.00 ppt Not Detected
NEtFOSAA 4/23/2024 <5.00 ppt 5.00 ppt Not Detected
PFOS 4/23/2024 <4.00 ppt 4.00 ppt Not Detected
PFHpS 4/23/2024 <3.00 ppt 3.00 ppt Not Detected
HFPO-DA 4/23/2024 <5.00 ppt 5.00 ppt Not Detected

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records, or to file a complaint, request a Consumer Confidence Report, or check current monitoring status, go directly to the federal and state regulators that enforce the Safe Drinking Water Act for Williamston Town of (0410010).

Federal Source of Truth

EPA SDWIS, Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID SC0410010 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

South Carolina Drinking Water Authority

South Carolina's primacy agency administers the Safe Drinking Water Act locally. Search EPA SDWIS for the current state contact, or use the state's public health or environment department portal.

Find SC regulator via EPA SDWIS

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2001 Coliform (TCR) MR 4 SDWIS / SC0410010 / 3100
2000 Coliform (TCR) MCL 2 SDWIS / SC0410010 / 3100
1996 TTHM MCL 16 SDWIS / SC0410010 / 2950
1996 Surface Water Treatment Rule TT 5 SDWIS / SC0410010 / 0200
1993 Nitrate MR 4 SDWIS / SC0410010 / 1040
1993 Chromium MR 2 SDWIS / SC0410010 / 1020
1993 Barium MR 2 SDWIS / SC0410010 / 1010
1993 Cadmium MR 2 SDWIS / SC0410010 / 1015
1993 Selenium MR 2 SDWIS / SC0410010 / 1045
1993 Mercury MR 1 SDWIS / SC0410010 / 1035

How Williamston Town of (0410010) Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric Williamston Town of (0410010) South Carolina avg Federal benchmark
Total violations 43 27.6 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 23 7 Indicates a contaminant exceeded a federal MCL
PFAS detection 1 compound 65.2% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 6,693 3,388 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 1,390 regulated public water systems in South Carolina.

Federal MCL reference, Safe Drinking Water Act thresholds
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Williamston Town of (0410010) water safe to drink?
Williamston Town of (0410010) (PWS ID: SC0410010) has 43 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 1 PFAS compound found. This system serves 6,693 people using Surface Water sources.
How many people does Williamston Town of (0410010) serve?
Williamston Town of (0410010) serves 6,693 people in Williamston, South Carolina. It is a Local-owned system using Surface Water water sources with 2,582 service connections.
What type of violations does Williamston Town of (0410010) have?
Williamston Town of (0410010) has 43 total violations: 23 health-based violations (MCL exceedances or treatment failures), 17 monitoring/reporting violations, and 5 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Williamston Town of (0410010) water?
Yes. UCMR5 testing detected 1 PFAS compound in Williamston Town of (0410010)'s water supply: PFBS. PFAS are persistent "forever chemicals" that do not break down in the environment.
What water source does Williamston Town of (0410010) use?
Williamston Town of (0410010) uses Surface Water as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
Where does this data come from?
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. PFAS data from EPA UCMR5 monitoring program (2023-2025). This data is provided for informational purposes only.
Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.