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Tap water quality report

Seneca, SC

EPA monitoring detected 16 contaminants across the 3 water suppliers serving Seneca. 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.

3
water suppliers
41,196
people served
16
contaminants found
South Carolina rankings Lead in South Carolina PFAS in South Carolina

What was found in Seneca'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
891 µg/L 22%
of the EPA limit 4000 µg/L
Main supplier: SENECA CITY OF (SC3710002) · 39,772 people · 2019
1/3 SYR4
TTHM
59.395 µg/L 74%
of the EPA limit 80 µg/L
Main supplier: SENECA CITY OF (SC3710002) · 39,772 people · 2019
Highest in the city: 84.24 µg/L — VIEW AT THE PIER THE (SC3770300) · 864 people · 2019
3/3 SYR4
Chloroform
52.45 µg/L
No EPA limit set
Main supplier: SENECA CITY OF (SC3710002) · 39,772 people · 2019
Highest in the city: 74.1 µg/L — VIEW AT THE PIER THE (SC3770300) · 864 people · 2019
3/3 SYR4
Copper
71.95 µg/L 5.5%
of the EPA limit 1300 µg/L
Main supplier: SENECA CITY OF (SC3710002) · 39,772 people · 2019
3/3 SYR4
Nitrate
67 µg/L 0.7%
of the EPA limit 10000 µg/L
Main supplier: SENECA CITY OF (SC3710002) · 39,772 people · 2019
1/3 SYR4
Total Haloacetic Acids (HAA5)
28.265 µg/L 47%
of the EPA limit 60 µg/L
Main supplier: SENECA CITY OF (SC3710002) · 39,772 people · 2019
Highest in the city: 30.8 µg/L — VIEW AT THE PIER THE (SC3770300) · 864 people · 2019
3/3 SYR4
Nitrate-Nitrite
28 µg/L 0.3%
of the EPA limit 10000 µg/L
Main supplier: SENECA CITY OF (SC3710002) · 39,772 people · 2012
1/3 SYR4
Lead
18.5 µg/L 123%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
Main supplier: SENECA CITY OF (SC3710002) · 39,772 people · 2019
2/3 SYR4
Dichloroacetic Acid
16.515 µg/L
No EPA limit set
Main supplier: SENECA CITY OF (SC3710002) · 39,772 people · 2019
Highest in the city: 16.76 µg/L — VIEW AT THE PIER THE (SC3770300) · 864 people · 2019
3/3 SYR4
Trichloroacetic Acid
13.665 µg/L
No EPA limit set
Main supplier: SENECA CITY OF (SC3710002) · 39,772 people · 2019
Highest in the city: 14.36 µg/L — VIEW AT THE PIER THE (SC3770300) · 864 people · 2019
3/3 SYR4
Bromodichloromethane
8.1965 µg/L
No EPA limit set
Main supplier: SENECA CITY OF (SC3710002) · 39,772 people · 2019
Highest in the city: 9.575 µg/L — HARTS COVE AND TORY POINTE (SC3750029) · 560 people · 2019
3/3 SYR4
Dibromochloromethane
2.1 µg/L
No EPA limit set
Main supplier: SENECA CITY OF (SC3710002) · 39,772 people · 2019
Highest in the city: 2.825 µg/L — HARTS COVE AND TORY POINTE (SC3750029) · 560 people · 2019
3/3 SYR4
Monobromoacetic Acid
1.979 µg/L
No EPA limit set
Main supplier: SENECA CITY OF (SC3710002) · 39,772 people · 2019
1/3 SYR4
Gross Alpha, Excl. Radon And U
1.4 pCi/L 9.3%
of the EPA limit 15 pCi/L
Main supplier: SENECA CITY OF (SC3710002) · 39,772 people · 2015
1/3 SYR4
Dibromoacetic Acid
1.195 µg/L
No EPA limit set
Highest in the city: HARTS COVE AND TORY POINTE (SC3750029) · 560 people · 2019
1/3 SYR4
Lead
0.0030 mg/L 20%
of the EPA limit 0.0150 mg/L
Main supplier: SENECA CITY OF (SC3710002) · 39,772 people · 2025
3/3 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 Seneca

SupplierPopulation served
SENECA CITY OF (SC3710002) 39,772
VIEW AT THE PIER THE (SC3770300) 864
HARTS COVE AND TORY POINTE (SC3750029) 560

Frequently asked questions about Seneca tap water

Is Seneca tap water safe to drink?

EPA testing detected 16 contaminants in the water serving Seneca. 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 Seneca?

3 public water suppliers report drinking-water monitoring for Seneca, South Carolina to the EPA. Each is listed above with its population served.

What contaminants are in Seneca's water?

The contaminants EPA monitoring detected in Seneca include Fluoride, TTHM, Chloroform, Copper, Nitrate. 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.