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Tap water quality report

Vermillion, SD

EPA monitoring detected 14 contaminants across the 2 water suppliers serving Vermillion. 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.

2
water suppliers
11,695
people served
14
contaminants found
South Dakota rankings Lead in South Dakota PFAS in South Dakota

What was found in Vermillion'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
Nitrate
900 µg/L 9%
of the EPA limit 10000 µg/L
Main supplier: VERMILLION · 11,695 people · 2019
2/2 SYR4
Fluoride
680 µg/L 17%
of the EPA limit 4000 µg/L
Main supplier: VERMILLION · 11,695 people · 2018
Highest in the city: 700 µg/L — LEWIS AND CLARK REGIONAL WATER SYSTE · 0 people · 2016
2/2 SYR4
Lithium
440 µg/L
No EPA limit set
Main supplier: VERMILLION · 11,695 people · 2025
1/2 UCMR-5
TTHM
43.155 µg/L 54%
of the EPA limit 80 µg/L
Main supplier: VERMILLION · 11,695 people · 2019
1/2 SYR4
Copper
25.5 µg/L 2%
of the EPA limit 1300 µg/L
Main supplier: VERMILLION · 11,695 people · 2018
1/2 SYR4
Total Haloacetic Acids (HAA5)
15.384 µg/L 26%
of the EPA limit 60 µg/L
Main supplier: VERMILLION · 11,695 people · 2019
1/2 SYR4
Barium
7.4 µg/L 0.4%
of the EPA limit 2000 µg/L
Main supplier: VERMILLION · 11,695 people · 2012
Highest in the city: 15.1 µg/L — LEWIS AND CLARK REGIONAL WATER SYSTE · 0 people · 2019
2/2 SYR4
Arsenic
4 µg/L 40%
of the EPA limit 10 µg/L
Highest in the city: LEWIS AND CLARK REGIONAL WATER SYSTE · 0 people · 2019
1/2 SYR4
Lead
1.765 µg/L 12%
of the EPA limit 15 µg/L
Main supplier: VERMILLION · 11,695 people · 2018
1/2 SYR4
Chromium
1.3 µg/L 1.3%
of the EPA limit 100 µg/L
Main supplier: VERMILLION · 11,695 people · 2012
2/2 SYR4
Gross Alpha, Excl. Radon And U
1.3 pCi/L 8.7%
of the EPA limit 15 pCi/L
Main supplier: VERMILLION · 11,695 people · 2012
1/2 SYR4
Selenium
0.9000 µg/L 1.8%
of the EPA limit 50 µg/L
Main supplier: VERMILLION · 11,695 people · 2012
1/2 SYR4
Mercury
0.1300 µg/L 6.5%
of the EPA limit 2 µg/L
Highest in the city: LEWIS AND CLARK REGIONAL WATER SYSTE · 0 people · 2019
1/2 SYR4
Lead
0.0010 mg/L 6.7%
of the EPA limit 0.0150 mg/L
Main supplier: VERMILLION · 11,695 people · 2024
1/2 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 Vermillion

SupplierPopulation served
VERMILLION 11,695
LEWIS AND CLARK REGIONAL WATER SYSTE 0

Frequently asked questions about Vermillion tap water

Is Vermillion tap water safe to drink?

EPA testing detected 14 contaminants in the water serving Vermillion. 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 Vermillion?

2 public water suppliers report drinking-water monitoring for Vermillion, South Dakota to the EPA. Each is listed above with its population served.

What contaminants are in Vermillion's water?

The contaminants EPA monitoring detected in Vermillion include Nitrate, Fluoride, Lithium, TTHM, Copper. 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.