Tap WaterIndex

← South Dakota

Tap water quality report

Goodwin, SD

EPA monitoring detected 13 contaminants across the 1 water supplier serving Goodwin. 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
4,280
people served
13
contaminants found
South Dakota rankings Lead in South Dakota PFAS in South Dakota

What was found in Goodwin'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
3200 µg/L 32%
of the EPA limit 10000 µg/L
Main supplier: SIOUX RURAL WATER SYSTEM · 4,280 people · 2019
1/1 SYR4
Copper
797.5 µg/L 61%
of the EPA limit 1300 µg/L
Main supplier: SIOUX RURAL WATER SYSTEM · 4,280 people · 2019
1/1 SYR4
TTHM
108.9 µg/L 136%
of the EPA limit, at the 95th percentile of samples — 80 µg/L
Main supplier: SIOUX RURAL WATER SYSTEM · 4,280 people · 2019
1/1 SYR4
Barium
103.275 µg/L 5.2%
of the EPA limit 2000 µg/L
Main supplier: SIOUX RURAL WATER SYSTEM · 4,280 people · 2013
1/1 SYR4
Total Haloacetic Acids (HAA5)
80.04 µg/L 133%
of the EPA limit, at the 95th percentile of samples — 60 µg/L
Main supplier: SIOUX RURAL WATER SYSTEM · 4,280 people · 2019
1/1 SYR4
Lithium
52.2 µg/L
No EPA limit set
Main supplier: SIOUX RURAL WATER SYSTEM · 4,280 people · 2023
1/1 UCMR-5
Chromium
9.66 µg/L 9.7%
of the EPA limit 100 µg/L
Main supplier: SIOUX RURAL WATER SYSTEM · 4,280 people · 2013
1/1 SYR4
Gross Alpha, Excl. Radon And U
6.735 pCi/L 45%
of the EPA limit 15 pCi/L
Main supplier: SIOUX RURAL WATER SYSTEM · 4,280 people · 2019
1/1 SYR4
Lead
6.24 µg/L 42%
of the EPA limit 15 µg/L
Main supplier: SIOUX RURAL WATER SYSTEM · 4,280 people · 2019
1/1 SYR4
Selenium
2.78 µg/L 5.6%
of the EPA limit 50 µg/L
Main supplier: SIOUX RURAL WATER SYSTEM · 4,280 people · 2013
1/1 SYR4
Arsenic
2 µg/L 20%
of the EPA limit 10 µg/L
Main supplier: SIOUX RURAL WATER SYSTEM · 4,280 people · 2013
1/1 SYR4
Antimony, Total
0.3900 µg/L 6.5%
of the EPA limit 6 µg/L
Main supplier: SIOUX RURAL WATER SYSTEM · 4,280 people · 2013
1/1 SYR4
Lead
0.0040 mg/L 27%
of the EPA limit 0.0150 mg/L
Main supplier: SIOUX RURAL WATER SYSTEM · 4,280 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 Goodwin

SupplierPopulation served
SIOUX RURAL WATER SYSTEM 4,280

Frequently asked questions about Goodwin tap water

Is Goodwin tap water safe to drink?

EPA testing detected 13 contaminants in the water serving Goodwin. 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 Goodwin?

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

What contaminants are in Goodwin's water?

The contaminants EPA monitoring detected in Goodwin include Nitrate, Copper, TTHM, Barium, 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.