Tap WaterIndex

← South Carolina

Tap water quality report

Johnsonville, SC

EPA monitoring detected 19 contaminants across the 1 water supplier serving Johnsonville. 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
5,083
people served
19
contaminants found
South Carolina rankings Lead in South Carolina PFAS in South Carolina

What was found in Johnsonville'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
1700 µg/L 43%
of the EPA limit 4000 µg/L
Main supplier: JOHNSONVILLE CITY OF (SC2110011) · 5,083 people · 2018
1/1 SYR4
Barium
86.25 µg/L 4.3%
of the EPA limit 2000 µg/L
Main supplier: JOHNSONVILLE CITY OF (SC2110011) · 5,083 people · 2018
1/1 SYR4
Copper
42.2 µg/L 3.2%
of the EPA limit 1300 µg/L
Main supplier: JOHNSONVILLE CITY OF (SC2110011) · 5,083 people · 2019
1/1 SYR4
Lithium
18 µg/L
No EPA limit set
Main supplier: JOHNSONVILLE CITY OF (SC2110011) · 5,083 people · 2025
1/1 UCMR-5
TTHM
16.29 µg/L 20%
of the EPA limit 80 µg/L
Main supplier: JOHNSONVILLE CITY OF (SC2110011) · 5,083 people · 2019
1/1 SYR4
Total Haloacetic Acids (HAA5)
11.4295 µg/L 19%
of the EPA limit 60 µg/L
Main supplier: JOHNSONVILLE CITY OF (SC2110011) · 5,083 people · 2019
1/1 SYR4
Chloroform
11.257 µg/L
No EPA limit set
Main supplier: JOHNSONVILLE CITY OF (SC2110011) · 5,083 people · 2019
1/1 SYR4
Dichloroacetic Acid
6.3215 µg/L
No EPA limit set
Main supplier: JOHNSONVILLE CITY OF (SC2110011) · 5,083 people · 2019
1/1 SYR4
Bromodichloromethane
4.803 µg/L
No EPA limit set
Main supplier: JOHNSONVILLE CITY OF (SC2110011) · 5,083 people · 2019
1/1 SYR4
Monobromoacetic Acid
2.4105 µg/L
No EPA limit set
Main supplier: JOHNSONVILLE CITY OF (SC2110011) · 5,083 people · 2019
1/1 SYR4
Trichloroacetic Acid
2.393 µg/L
No EPA limit set
Main supplier: JOHNSONVILLE CITY OF (SC2110011) · 5,083 people · 2019
1/1 SYR4
Gross Alpha, Excl. Radon And U
1.9353 pCi/L 13%
of the EPA limit 15 pCi/L
Main supplier: JOHNSONVILLE CITY OF (SC2110011) · 5,083 people · 2016
1/1 SYR4
Dibromoacetic Acid
1.891 µg/L
No EPA limit set
Main supplier: JOHNSONVILLE CITY OF (SC2110011) · 5,083 people · 2019
1/1 SYR4
Dibromochloromethane
1.6835 µg/L
No EPA limit set
Main supplier: JOHNSONVILLE CITY OF (SC2110011) · 5,083 people · 2019
1/1 SYR4
Lead
1.64 µg/L 11%
of the EPA limit 15 µg/L
Main supplier: JOHNSONVILLE CITY OF (SC2110011) · 5,083 people · 2019
1/1 SYR4
Combined Radium (-226 And -228)
1.2429 pCi/L 25%
of the EPA limit 5 pCi/L
Main supplier: JOHNSONVILLE CITY OF (SC2110011) · 5,083 people · 2018
1/1 SYR4
Bromoform
1.05 µg/L
No EPA limit set
Main supplier: JOHNSONVILLE CITY OF (SC2110011) · 5,083 people · 2019
1/1 SYR4
Thallium, Total
0.7600 µg/L 38%
of the EPA limit 2 µg/L
Main supplier: JOHNSONVILLE CITY OF (SC2110011) · 5,083 people · 2018
1/1 SYR4
Lead
0.0056 mg/L 37%
of the EPA limit 0.0150 mg/L
Main supplier: JOHNSONVILLE CITY OF (SC2110011) · 5,083 people · 2025
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 Johnsonville

SupplierPopulation served
JOHNSONVILLE CITY OF (SC2110011) 5,083

Frequently asked questions about Johnsonville tap water

Is Johnsonville tap water safe to drink?

EPA testing detected 19 contaminants in the water serving Johnsonville. 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 Johnsonville?

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

What contaminants are in Johnsonville's water?

The contaminants EPA monitoring detected in Johnsonville include Fluoride, Barium, Copper, Lithium, TTHM. 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.