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Water system · PWSID SC4610002

ROCK HILL CITY OF (SC4610002)

ROCK HILL, SC · ~84,504 people served

Check your exact address → ROCK HILL overview
100
Excellent
PurityRadar safety score

PWSID

SC4610002

State

South Carolina

City

ROCK HILL

Population served

84,504

Primary source

Surface water

Score history

No change since tracking began Jun 18, 2026.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 100

2 score updates logged since tracking began Jun 18, 2026. Each future EPA re-score adds a point.

PFAS & contaminant readings

Latest detections from EPA’s UCMR5 monitoring (through Jul 2024). Levels in parts per trillion (ppt).

PFPeA

4.3 ppt

limit —

No federal limit

PFHxA

3.7 ppt

limit —

No federal limit

Violations & enforcement

15

Violations on record

0

Unaddressed

4

Health-based

23

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Mar 2016. Official EPA record →

Monitoring & reporting · Lead & Copper Rule began Oct 2013 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Jul 2013 Resolved
Monitoring & reporting · Lead & Copper Rule began Oct 2011 Resolved
Max contaminant level (MCL) · Total coliform health-based began Jun 1996 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Jul 1994 Resolved
Treatment technique · EPA contaminant 0200 health-based began Jan 1994 Resolved
Monitoring & reporting · Nitrate began Jul 1993 Resolved
Monitoring & reporting · Nitrate began Apr 1993 Resolved
Monitoring & reporting · Nitrate began Jan 1993 Resolved
Monitoring & reporting · Selenium began Jan 1993 Resolved
Monitoring & reporting · Barium began Jan 1993 Resolved
Monitoring & reporting · Cadmium began Jan 1993 Resolved

Recent enforcement actions

  • State action · SIA Mar 2016
  • State action · SIE Mar 2016
  • State action · SIA Mar 2016
  • State action · SOX Dec 2014
  • State action · SOX Dec 2014
  • State action · SIF Jan 2014
  • State action · SOX Jan 2014
  • State action · SOX Jan 2014

Area water-quality monitoring

Environmental monitoring (rivers, wells, intakes) recorded in this system’s service area in the EPA/USGS Water Quality Portal since 2018 — source/ambient water, not finished tap water. Context for the watershed, not a reading from your tap.

ContaminantMedian · max · samples

Manganese

2 stations · latest Nov 2021

0.14 · max 0.22 mg/L · 13

Lead

2 stations · latest Mar 2020

0.00425 · max 0.0049 mg/L · 2

Copper

1 station · latest Jun 2020

0.015 · max 0.015 mg/L · 1

Source: Water Quality Portal (EPA/USGS/state agencies). Values are as-reported and aren’t health thresholds.

This profile is built from EPA public records for system SC4610002 — SDWIS violations and UCMR5 PFAS sampling. The score is system-level and can’t account for your home’s plumbing (older pipes can add lead at the tap). For health decisions, check your exact address, read the utility’s Consumer Confidence Report, and confirm with your provider.