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Tap water quality report

Frankfort, SD

EPA monitoring detected 7 contaminants across the 3 water suppliers serving Frankfort. 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
283
people served
7
contaminants found
South Dakota rankings Lead in South Dakota PFAS in South Dakota

What was found in Frankfort'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
800 µg/L 8%
of the EPA limit 10000 µg/L
Highest in the city: GLENDALE COLONY · 95 people · 2019
2/3 SYR4
Fluoride
200 µg/L 5%
of the EPA limit 4000 µg/L
Main supplier: SPINK COLONY · 108 people · 2013
3/3 SYR4
Copper
20 µg/L 1.5%
of the EPA limit 1300 µg/L
Main supplier: SPINK COLONY · 108 people · 2019
Highest in the city: 70 µg/L — GLENDALE COLONY · 95 people · 2019
3/3 SYR4
Lead
0.4000 µg/L 2.7%
of the EPA limit 15 µg/L
Main supplier: SPINK COLONY · 108 people · 2019
Highest in the city: 4.719999999999997 µg/L — CAMROSE COLONY · 80 people · 2019
3/3 SYR4
Selenium
0.6000 µg/L 1.2%
of the EPA limit 50 µg/L
Highest in the city: GLENDALE COLONY · 95 people · 2013
1/3 SYR4
Chromium
0.5000 µg/L 0.5%
of the EPA limit 100 µg/L
Main supplier: SPINK COLONY · 108 people · 2013
2/3 SYR4
Lead
0.0010 mg/L 6.7%
of the EPA limit 0.0150 mg/L
Main supplier: SPINK COLONY · 108 people · 2025
Highest in the city: 0.0060 mg/L — CAMROSE COLONY · 80 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 Frankfort

SupplierPopulation served
SPINK COLONY 108
GLENDALE COLONY 95
CAMROSE COLONY 80

Frequently asked questions about Frankfort tap water

Is Frankfort tap water safe to drink?

EPA testing detected 7 contaminants in the water serving Frankfort. 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 Frankfort?

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

What contaminants are in Frankfort's water?

The contaminants EPA monitoring detected in Frankfort include Nitrate, Fluoride, Copper, Lead, Selenium. 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.