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Tap water quality report

Mount Pleasant, SC

EPA monitoring detected 23 contaminants across the 1 water supplier serving Mount Pleasant. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier for each below, with its EPA source and period.

1
water supplier
91,500
people served
23
contaminants found
South Carolina rankings Lead in South Carolina PFAS in South Carolina

What was found in Mount Pleasant's water

The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Fluoride
567 µg/L 14%
of the EPA limit 4000 µg/L
Main supplier: MT PLEASANT WATER WORKS (1010002) · 91,500 people · 2019
1/1 SYR4
Nitrate
180 µg/L 1.8%
of the EPA limit 10000 µg/L
Main supplier: MT PLEASANT WATER WORKS (1010002) · 91,500 people · 2019
1/1 SYR4
Copper
162 µg/L 12%
of the EPA limit 1300 µg/L
Main supplier: MT PLEASANT WATER WORKS (1010002) · 91,500 people · 2017
1/1 SYR4
Nitrate-Nitrite
74.8 µg/L 0.7%
of the EPA limit 10000 µg/L
Main supplier: MT PLEASANT WATER WORKS (1010002) · 91,500 people · 2018
1/1 SYR4
Total Haloacetic Acids (HAA5)
38.936 µg/L 65%
of the EPA limit 60 µg/L
Main supplier: MT PLEASANT WATER WORKS (1010002) · 91,500 people · 2019
1/1 SYR4
Dichloroacetic Acid
32.32 µg/L
No EPA limit set
Main supplier: MT PLEASANT WATER WORKS (1010002) · 91,500 people · 2019
1/1 SYR4
TTHM
23.996 µg/L 30%
of the EPA limit 80 µg/L
Main supplier: MT PLEASANT WATER WORKS (1010002) · 91,500 people · 2019
1/1 SYR4
Bromoform
14.7425 µg/L
No EPA limit set
Main supplier: MT PLEASANT WATER WORKS (1010002) · 91,500 people · 2019
1/1 SYR4
Chloroform
10.792 µg/L
No EPA limit set
Main supplier: MT PLEASANT WATER WORKS (1010002) · 91,500 people · 2019
1/1 SYR4
Dibromoacetic Acid
9.0685 µg/L
No EPA limit set
Main supplier: MT PLEASANT WATER WORKS (1010002) · 91,500 people · 2019
1/1 SYR4
Bromodichloromethane
7.765 µg/L
No EPA limit set
Main supplier: MT PLEASANT WATER WORKS (1010002) · 91,500 people · 2019
1/1 SYR4
Dibromochloromethane
7.743 µg/L
No EPA limit set
Main supplier: MT PLEASANT WATER WORKS (1010002) · 91,500 people · 2019
1/1 SYR4
Trichloroacetic Acid
4.489 µg/L
No EPA limit set
Main supplier: MT PLEASANT WATER WORKS (1010002) · 91,500 people · 2019
1/1 SYR4
Monochloroacetic Acid
4.36544 µg/L
No EPA limit set
Main supplier: MT PLEASANT WATER WORKS (1010002) · 91,500 people · 2019
1/1 SYR4
Monobromoacetic Acid
3.092 µg/L
No EPA limit set
Main supplier: MT PLEASANT WATER WORKS (1010002) · 91,500 people · 2019
1/1 SYR4
Lead
2.535 µg/L 17%
of the EPA limit 15 µg/L
Main supplier: MT PLEASANT WATER WORKS (1010002) · 91,500 people · 2017
1/1 SYR4
PFOS
0.0084 µg/L
No EPA limit set
Main supplier: MT PLEASANT WATER WORKS (1010002) · 91,500 people · 2025
1/1 UCMR-5
Pfba
0.0063 µg/L
No EPA limit set
Main supplier: MT PLEASANT WATER WORKS (1010002) · 91,500 people · 2025
1/1 UCMR-5
Pfpea
0.0060 µg/L
No EPA limit set
Main supplier: MT PLEASANT WATER WORKS (1010002) · 91,500 people · 2025
1/1 UCMR-5
PFOA
0.0055 µg/L
No EPA limit set
Main supplier: MT PLEASANT WATER WORKS (1010002) · 91,500 people · 2025
1/1 UCMR-5
Pfhxa
0.0051 µg/L
No EPA limit set
Main supplier: MT PLEASANT WATER WORKS (1010002) · 91,500 people · 2025
1/1 UCMR-5
PFBS
0.0044 µg/L
No EPA limit set
Main supplier: MT PLEASANT WATER WORKS (1010002) · 91,500 people · 2025
1/1 UCMR-5
Lead
0.0011 mg/L 7.3%
of the EPA limit 0.0150 mg/L
Main supplier: MT PLEASANT WATER WORKS (1010002) · 91,500 people · 2023
1/1 LCR
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 the system's samples — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately. These are the utilities' own EPA-reported results, not a city-wide average. A detection means the lab measured the substance — it isn't the same as exceeding a legal limit. Hover a source tag to see the EPA program and years behind each figure.

Water suppliers serving Mount Pleasant

SupplierPopulation served
MT PLEASANT WATER WORKS (1010002) 91,500

Frequently asked questions about Mount Pleasant tap water

Is Mount Pleasant tap water safe to drink?

EPA testing detected 23 contaminants in the water serving Mount Pleasant. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.

How many water suppliers serve Mount Pleasant?

1 public water supplier report drinking-water monitoring for Mount Pleasant, South Carolina to the EPA. Each is listed above with its population served.

What contaminants are in Mount Pleasant's water?

The contaminants EPA monitoring detected in Mount Pleasant include Fluoride, Nitrate, Copper, Nitrate-Nitrite, Total Haloacetic Acids (HAA5). The full list, with the level at the main supplier and the data source, is in the table above.

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.