Is Rock Hill City of (sc4610002) Tap Water Safe? Quality Report

Water source: Surface water
Ownership: Local government
Counties served: York

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

health-based violations

violations on file

still open

Violation	Type	Status	Period
MCL	Health-based	Resolved	2013-07-01 → 2013-09-30
MCL	Health-based	Resolved	2013-07-01 → 2013-09-30
MCL	Health-based	Resolved	2013-07-01 → 2013-09-30
MCL	Health-based	Resolved	2013-07-01 → 2013-09-30
MCL	Health-based	Resolved	1996-06-01 → 1996-06-30
MCL	Health-based	Resolved	1996-06-01 → 1996-06-30
MCL	Health-based	Resolved	1994-07-01 → 1994-09-30
MCL	Health-based	Resolved	1994-07-01 → 1994-09-30
TT	Health-based	Resolved	1994-01-01 → 1994-01-31
TT	Health-based	Resolved	1994-01-01 → 1994-01-31

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).

Contaminant	Max	Detection rate	Period
Pfhxa	0.0044 µg/L	4/4	2024
Pfpea	0.0059 µg/L	4/4	2024

Other contaminants detected

Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the 95th percentile of this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.

Contaminant	Level vs EPA limit	Detection rate	Source	Period
Bromodichloromethane	26.7 µg/L No EPA limit set worst single sample: 94 µg/L	427/428	SYR4	2012–2019
Dibromochloromethane	32.4 µg/L No EPA limit set worst single sample: 52 µg/L	427/428	SYR4	2012–2019
Dichloroacetic Acid	16.4 µg/L No EPA limit set worst single sample: 41.69 µg/L	427/428	SYR4	2012–2019
TTHM	88.57 µg/L 111% of the EPA limit, at the 95th percentile of samples — 80 µg/L worst single sample: 137.7 µg/L	427/428	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	28.12 µg/L 47% of the EPA limit 60 µg/L worst single sample: 47.97 µg/L	427/428	SYR4	2012–2019
Chloroform	44.6 µg/L No EPA limit set worst single sample: 65.6 µg/L	416/428	SYR4	2012–2019
Trichloroacetic Acid	9.6 µg/L No EPA limit set worst single sample: 72 µg/L	403/428	SYR4	2012–2019
Dibromoacetic Acid	9.6 µg/L No EPA limit set worst single sample: 11.7 µg/L	372/428	SYR4	2012–2019
Bromoform	19.2 µg/L No EPA limit set worst single sample: 27.9 µg/L	260/428	SYR4	2012–2019
Monobromoacetic Acid	6.952 µg/L No EPA limit set worst single sample: 10.96 µg/L	75/428	SYR4	2012–2019
Copper	51.05 µg/L 3.9% of the EPA limit 1300 µg/L worst single sample: 189 µg/L	58/60	SYR4	2014–2017
Lead	0.0020 mg/L 13% of the EPA limit 0.0150 mg/L	19/19	LCR	2023
Lead	118.4 µg/L 789% of the EPA limit, at the 95th percentile of samples — 15 µg/L worst single sample: 528 µg/L	17/60	SYR4	2014–2017
Nitrate	460 µg/L 4.6% of the EPA limit 10000 µg/L	16/16	SYR4	2012–2019
Fluoride	713 µg/L 18% of the EPA limit 4000 µg/L worst single sample: 720 µg/L	8/8	SYR4	2012–2019
Monochloroacetic Acid	2.75 µg/L No EPA limit set worst single sample: 2.9 µg/L	7/428	SYR4	2012–2019
Gross Beta Particle Activity	3.291 pCi/L No EPA limit set worst single sample: 3.3 pCi/L	3/29	SYR4	2012–2019

87 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalArsenicAtrazineBhc-GammaBariumBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumCombined Radium (-226 And -228)DichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndrinEthylbenzeneGlyphosateGross Alpha, Excl. Radon And UHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: SASSER, GABE
Phone: 803-322-7494
Email: [email protected]; [email protected]; [email protected]

Frequently asked questions about Rock Hill City of (sc4610002)

Is Rock Hill City of (sc4610002) tap water safe to drink?

EPA monitoring detected 19 contaminants in Rock Hill City of (sc4610002)'s water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Rock Hill City of (sc4610002)'s water?

EPA monitoring detected Bromodichloromethane, Dibromochloromethane, Dichloroacetic Acid, TTHM, Total Haloacetic Acids (HAA5), and others. The full list with the level and data source for each is above.

How many people does Rock Hill City of (sc4610002) serve?

Rock Hill City of (sc4610002) reports serving 89,850 people in South Carolina, per its EPA record.

Has Rock Hill City of (sc4610002) had any water quality violations?

The EPA has 26 violations on file for Rock Hill City of (sc4610002), of which 12 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.