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Tap water quality report

Hermosa, SD

EPA monitoring detected 11 contaminants across the 4 water suppliers serving Hermosa. 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.

4
water suppliers
663
people served
11
contaminants found
South Dakota rankings Lead in South Dakota PFAS in South Dakota

What was found in Hermosa'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
500 µg/L 13%
of the EPA limit 4000 µg/L
Highest in the city: HEARTLAND COUNTRY RANCHETTES · 95 people · 2013
2/4 SYR4
Nitrate
333 µg/L 3.3%
of the EPA limit 10000 µg/L
Highest in the city: HEARTLAND COUNTRY RANCHETTES · 95 people · 2018
2/4 SYR4
Copper
250.54999999999995 µg/L 19%
of the EPA limit 1300 µg/L
Main supplier: HERMOSA-OLD SYSTEM · 420 people · 2017
3/4 SYR4
Barium
90 µg/L 4.5%
of the EPA limit 2000 µg/L
Highest in the city: HERMOSA WATER USERS ASSOCIATION · 108 people · 2014
2/4 SYR4
Combined Uranium
23.5 µg/L 78%
of the EPA limit 30 µg/L
Highest in the city: HEARTLAND COUNTRY RANCHETTES · 95 people · 2019
1/4 SYR4
TTHM
14.402999999999999 µg/L 18%
of the EPA limit 80 µg/L
Main supplier: HERMOSA-OLD SYSTEM · 420 people · 2017
1/4 SYR4
Gross Alpha, Excl. Radon And U
13.3 pCi/L 89%
of the EPA limit 15 pCi/L
Main supplier: HERMOSA-OLD SYSTEM · 420 people · 2017
3/4 SYR4
Lead
1 µg/L 6.7%
of the EPA limit 15 µg/L
Main supplier: HERMOSA-OLD SYSTEM · 420 people · 2017
Highest in the city: 13.099999999999993 µg/L — HEARTLAND COUNTRY RANCHETTES · 95 people · 2019
3/4 SYR4
Selenium
9 µg/L 18%
of the EPA limit 50 µg/L
Highest in the city: HEARTLAND COUNTRY RANCHETTES · 95 people · 2013
1/4 SYR4
Arsenic
6 µg/L 60%
of the EPA limit 10 µg/L
Highest in the city: HERMOSA WATER USERS ASSOCIATION · 108 people · 2014
1/4 SYR4
Lead
0.0070 mg/L 47%
of the EPA limit 0.0150 mg/L
Main supplier: HERMOSA-OLD SYSTEM · 420 people · 2023
4/4 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 Hermosa

SupplierPopulation served
HERMOSA-OLD SYSTEM 420
HERMOSA WATER USERS ASSOCIATION 108
HEARTLAND COUNTRY RANCHETTES 95
NORTH HERMOSA WUD 40

Frequently asked questions about Hermosa tap water

Is Hermosa tap water safe to drink?

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

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

What contaminants are in Hermosa's water?

The contaminants EPA monitoring detected in Hermosa include Fluoride, Nitrate, Copper, Barium, Combined Uranium. 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.