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Tap water quality report

Delmont, SD

EPA monitoring detected 12 contaminants across the 3 water suppliers serving Delmont. 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
358
people served
12
contaminants found
South Dakota rankings Lead in South Dakota PFAS in South Dakota

What was found in Delmont'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
1500 µg/L 38%
of the EPA limit 4000 µg/L
Highest in the city: CLEARFIELD COLONY · 120 people · 2013
2/3 SYR4
Nitrate
1400 µg/L 14%
of the EPA limit 10000 µg/L
Highest in the city: GREENWOOD COLONY · 85 people · 2019
1/3 SYR4
Nitrite
1086 µg/L 109%
of the EPA limit, at the 95th percentile of samples — 1000 µg/L
Highest in the city: GREENWOOD COLONY · 85 people · 2018
1/3 SYR4
Copper
86.49999999999997 µg/L 6.7%
of the EPA limit 1300 µg/L
Main supplier: DELMONT · 153 people · 2017
3/3 SYR4
TTHM
74.35 µg/L 93%
of the EPA limit 80 µg/L
Main supplier: DELMONT · 153 people · 2019
1/3 SYR4
Total Haloacetic Acids (HAA5)
48.359999999999985 µg/L 81%
of the EPA limit 60 µg/L
Main supplier: DELMONT · 153 people · 2019
1/3 SYR4
Barium
27.6 µg/L 1.4%
of the EPA limit 2000 µg/L
Highest in the city: CLEARFIELD COLONY · 120 people · 2013
2/3 SYR4
Chromium
7.1 µg/L 7.1%
of the EPA limit 100 µg/L
Highest in the city: GREENWOOD COLONY · 85 people · 2017
1/3 SYR4
Selenium
5.1 µg/L 10%
of the EPA limit 50 µg/L
Highest in the city: CLEARFIELD COLONY · 120 people · 2013
1/3 SYR4
Lead
1.21 µg/L 8.1%
of the EPA limit 15 µg/L
Main supplier: DELMONT · 153 people · 2017
Highest in the city: 3.009999999999995 µg/L — CLEARFIELD COLONY · 120 people · 2019
3/3 SYR4
Arsenic
3 µg/L 30%
of the EPA limit 10 µg/L
Highest in the city: CLEARFIELD COLONY · 120 people · 2013
1/3 SYR4
Lead
0.0010 mg/L 6.7%
of the EPA limit 0.0150 mg/L
Main supplier: DELMONT · 153 people · 2024
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 Delmont

SupplierPopulation served
DELMONT 153
CLEARFIELD COLONY 120
GREENWOOD COLONY 85

Frequently asked questions about Delmont tap water

Is Delmont tap water safe to drink?

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

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

What contaminants are in Delmont's water?

The contaminants EPA monitoring detected in Delmont include Fluoride, Nitrate, Nitrite, Copper, 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.