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Tap water quality report

Tea, SD

EPA monitoring detected 12 contaminants across the 2 water suppliers serving Tea. 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
7,381
people served
12
contaminants found
South Dakota rankings Lead in South Dakota PFAS in South Dakota

What was found in Tea'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
700 µg/L 18%
of the EPA limit 4000 µg/L
Highest in the city: LEWIS AND CLARK REGIONAL WATER SYSTE · 0 people · 2016
1/2 SYR4
Nitrate
700 µg/L 7%
of the EPA limit 10000 µg/L
Highest in the city: LEWIS AND CLARK REGIONAL WATER SYSTE · 0 people · 2019
1/2 SYR4
Copper
140.5 µg/L 11%
of the EPA limit 1300 µg/L
Main supplier: TEA · 7,381 people · 2018
1/2 SYR4
Lithium
55.9 µg/L
No EPA limit set
Main supplier: TEA · 7,381 people · 2025
1/2 UCMR-5
TTHM
41.3 µg/L 52%
of the EPA limit 80 µg/L
Main supplier: TEA · 7,381 people · 2019
1/2 SYR4
Total Haloacetic Acids (HAA5)
23.3 µg/L 39%
of the EPA limit 60 µg/L
Main supplier: TEA · 7,381 people · 2019
1/2 SYR4
Barium
15.1 µg/L 0.8%
of the EPA limit 2000 µg/L
Highest in the city: LEWIS AND CLARK REGIONAL WATER SYSTE · 0 people · 2019
1/2 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
2.115 µg/L 14%
of the EPA limit 15 µg/L
Main supplier: TEA · 7,381 people · 2018
1/2 SYR4
Chromium
0.5000 µg/L 0.5%
of the EPA limit 100 µg/L
Highest in the city: LEWIS AND CLARK REGIONAL WATER SYSTE · 0 people · 2019
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: TEA · 7,381 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 Tea

SupplierPopulation served
TEA 7,381
LEWIS AND CLARK REGIONAL WATER SYSTE 0

Frequently asked questions about Tea tap water

Is Tea tap water safe to drink?

EPA testing detected 12 contaminants in the water serving Tea. 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 Tea?

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

What contaminants are in Tea's water?

The contaminants EPA monitoring detected in Tea include Fluoride, Nitrate, 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.