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Tap water quality report

Gregory, SD

EPA monitoring detected 11 contaminants across the 1 water supplier serving Gregory. 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
1,221
people served
11
contaminants found
South Dakota rankings Lead in South Dakota PFAS in South Dakota

What was found in Gregory'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
2800 µg/L 28%
of the EPA limit 10000 µg/L
Main supplier: GREGORY · 1,221 people · 2019
1/1 SYR4
Fluoride
700 µg/L 18%
of the EPA limit 4000 µg/L
Main supplier: GREGORY · 1,221 people · 2017
1/1 SYR4
Copper
453.5 µg/L 35%
of the EPA limit 1300 µg/L
Main supplier: GREGORY · 1,221 people · 2017
1/1 SYR4
Barium
133 µg/L 6.7%
of the EPA limit 2000 µg/L
Main supplier: GREGORY · 1,221 people · 2017
1/1 SYR4
TTHM
25.855 µg/L 32%
of the EPA limit 80 µg/L
Main supplier: GREGORY · 1,221 people · 2019
1/1 SYR4
Total Haloacetic Acids (HAA5)
7.969 µg/L 13%
of the EPA limit 60 µg/L
Main supplier: GREGORY · 1,221 people · 2019
1/1 SYR4
Gross Alpha, Excl. Radon And U
5 pCi/L 33%
of the EPA limit 15 pCi/L
Main supplier: GREGORY · 1,221 people · 2014
1/1 SYR4
Lead
4.175 µg/L 28%
of the EPA limit 15 µg/L
Main supplier: GREGORY · 1,221 people · 2017
1/1 SYR4
Selenium
3.6 µg/L 7.2%
of the EPA limit 50 µg/L
Main supplier: GREGORY · 1,221 people · 2017
1/1 SYR4
Antimony, Total
0.2500 µg/L 4.2%
of the EPA limit 6 µg/L
Main supplier: GREGORY · 1,221 people · 2017
1/1 SYR4
Lead
0.0030 mg/L 20%
of the EPA limit 0.0150 mg/L
Main supplier: GREGORY · 1,221 people · 2023
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 Gregory

SupplierPopulation served
GREGORY 1,221

Frequently asked questions about Gregory tap water

Is Gregory tap water safe to drink?

EPA testing detected 11 contaminants in the water serving Gregory. 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 Gregory?

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

What contaminants are in Gregory's water?

The contaminants EPA monitoring detected in Gregory include Nitrate, Fluoride, Copper, Barium, 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.