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Tap water quality report

Mt Pleasant Water Works (1010002)

EPA monitoring tested this supplier for 108 contaminants and detected 23. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

108
contaminants tested
23
detected
91,500
people served
1
health-based violations
South Carolina rankingsLead in South CarolinaPFAS in South Carolina
Water source
SWP
Ownership
Local government
Counties served
Charleston

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.

1
health-based violations
12
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Archived 1987-06-01 → 1987-06-30
MR Monitoring Resolved 2020-06-18
MR Monitoring Resolved 2020-06-18
MR Monitoring Resolved 2020-06-18
MR Monitoring Resolved 2020-06-18
MR Monitoring Resolved 2006-06-01 → 2006-06-30
MR Monitoring Resolved 2006-06-01 → 2006-06-30
MR Monitoring Resolved 2006-06-01 → 2006-06-30
MR Monitoring Resolved 2006-06-01 → 2006-06-30
MR Monitoring Resolved 1992-07-01 → 1993-10-07

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).
ContaminantMaxDetection ratePeriod
PFOS 0.0084 µg/L 4/12 2025
Pfpea 0.0060 µg/L 4/12 2025
PFBS 0.0044 µg/L 3/12 2025
Pfhxa 0.0051 µg/L 3/12 2025
PFOA 0.0055 µg/L 3/12 2025
Pfba 0.0063 µg/L 2/12 2025

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.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Total Haloacetic Acids (HAA5)
38.936 µg/L 65%
of the EPA limit 60 µg/L
worst single sample: 51.79 µg/L
207/249 SYR4 2012–2019
TTHM
23.996 µg/L 30%
of the EPA limit 80 µg/L
worst single sample: 35.86 µg/L
203/249 SYR4 2012–2019
Dichloroacetic Acid
32.32 µg/L
No EPA limit set
worst single sample: 47.57 µg/L
196/249 SYR4 2012–2019
Bromodichloromethane
7.765 µg/L
No EPA limit set
worst single sample: 10.12 µg/L
195/249 SYR4 2012–2019
Dibromochloromethane
7.743 µg/L
No EPA limit set
worst single sample: 13.06 µg/L
179/249 SYR4 2012–2019
Chloroform
10.792 µg/L
No EPA limit set
worst single sample: 20.03 µg/L
177/249 SYR4 2012–2019
Dibromoacetic Acid
9.0685 µg/L
No EPA limit set
worst single sample: 11.92 µg/L
150/249 SYR4 2012–2019
Monobromoacetic Acid
3.092 µg/L
No EPA limit set
worst single sample: 5.79 µg/L
112/249 SYR4 2012–2019
Trichloroacetic Acid
4.489 µg/L
No EPA limit set
worst single sample: 6.48 µg/L
103/249 SYR4 2012–2019
Copper
162 µg/L 12%
of the EPA limit 1300 µg/L
worst single sample: 320 µg/L
55/60 SYR4 2014–2017
Nitrate
180 µg/L 1.8%
of the EPA limit 10000 µg/L
worst single sample: 570 µg/L
42/74 SYR4 2012–2019
Bromoform
14.7425 µg/L
No EPA limit set
worst single sample: 18.59 µg/L
24/249 SYR4 2012–2019
Lead
0.0011 mg/L 7.3%
of the EPA limit 0.0150 mg/L
 16/16 LCR 2023
Lead
2.535 µg/L 17%
of the EPA limit 15 µg/L
worst single sample: 2.6 µg/L
14/60 SYR4 2014–2017
Fluoride
567 µg/L 14%
of the EPA limit 4000 µg/L
worst single sample: 600 µg/L
12/12 SYR4 2014–2019
Monochloroacetic Acid
4.36544 µg/L
No EPA limit set
worst single sample: 4.418 µg/L
5/249 SYR4 2012–2019
Nitrate-Nitrite
74.8 µg/L 0.7%
of the EPA limit 10000 µg/L
worst single sample: 82 µg/L
5/10 SYR4 2012–2018
85 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 UGross Beta Particle ActivityHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaNitriteOxamylPfdaPfdoaPfeesaPfhpaPfhpsPFHXSPfmbaPfmpaPFNAPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
CLUM, ALLAN
Phone
843-884-9626
Email
[email protected]; [email protected]; [email protected]

Frequently asked questions about Mt Pleasant Water Works (1010002)

Is Mt Pleasant Water Works (1010002) tap water safe to drink?

EPA monitoring detected 23 contaminants in Mt Pleasant Water Works (1010002)'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 Mt Pleasant Water Works (1010002)'s water?

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

How many people does Mt Pleasant Water Works (1010002) serve?

Mt Pleasant Water Works (1010002) reports serving 91,500 people in South Carolina, per its EPA record.

Has Mt Pleasant Water Works (1010002) had any water quality violations?

The EPA has 12 violations on file for Mt Pleasant Water Works (1010002), of which 1 is 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.