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Tap water quality report

Piedmont, SD

EPA monitoring detected 12 contaminants across the 27 water suppliers serving Piedmont. A detection doesn't automatically mean the water is unsafe — see the highest level found for each below, with its EPA source and period.

27
water suppliers
5,364
people served
12
contaminants found
South Dakota rankings Lead in South Dakota PFAS in South Dakota

What was found in Piedmont's water

The highest level seen across the city's suppliers, the EPA limit for each, and where the figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Nitrate
9900 µg/L 99%
of the EPA limit 10000 µg/L
 15/27 SYR4
Fluoride
1600 µg/L 40%
of the EPA limit 4000 µg/L
 19/27 SYR4
Copper
1590 µg/L 122%
of the EPA limit, in the worst sample — 1300 µg/L
 25/27 SYR4
Barium
554 µg/L 28%
of the EPA limit 2000 µg/L
 19/27 SYR4
TTHM
82.5 µg/L 103%
of the EPA limit, in the worst sample — 80 µg/L
 14/27 SYR4
Total Haloacetic Acids (HAA5)
70.3 µg/L 117%
of the EPA limit, in the worst sample — 60 µg/L
 7/27 SYR4
Lead
23 µg/L 153%
of the EPA limit, in the worst sample — 15 µg/L
 25/27 SYR4
Selenium
17 µg/L 34%
of the EPA limit 50 µg/L
 3/27 SYR4
Gross Alpha, Excl. Radon And U
13.5 pCi/L 90%
of the EPA limit 15 pCi/L
 16/27 SYR4
Combined Uranium
11 µg/L 37%
of the EPA limit 30 µg/L
 2/27 SYR4
Arsenic
8 µg/L 80%
of the EPA limit 10 µg/L
 4/27 SYR4
Lead
0.0090 mg/L 60%
of the EPA limit 0.0150 mg/L
 27/27 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 single worst sample on record — 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 Piedmont

SupplierPopulation served
NORTHDALE SANITARY DISTRICT 1,075
PIEDMONT 971
WESTON HEIGHTS HOMEOWNERS ASSOCIATIO 412
BLUCKSBERG MOUNTAIN #2 333
TIMBERWOOD PARK ESTATES 283
SUNSET RANCH 263
VALLEY VIEW WATER COMPANY 248
SUNNYSIDE MOBILE HOME PARK II 235
BLUCKSBERG MOUNTAIN #1 223
HORSESHOE ACRES WATER ASSOCIATION 180
WESTBERRY TRAILS WATER USERS ASSOC 155
ROLLING DICE SUBDIVISION 122
ELK CREEK VILLAGE 110
SPRING CANYON WATER COMPANY 89
SHERIDAN LAKE HIGHLANDS, INC. 85
BESTGEN ADDITION WATER COMPANY 73
CROOKED OAKS CANYON HOMEOWNERS 70
RIMROCK HIGHLAND ESTATES COMM ASSOC 66
AUTUMN MEADOWS SANITARY DISTRICT 49
PLEASANT VALLEY HOMEOWNERS ASSOCIATI 48
CAVALRY TRAILS HOMEOWNER ASSOCIATION 44
PINE CONE ESTATES 42
VALLEY VIEW WATER ASSOCIATION 42
CEDAR GULCH 2 40
LOFTY PINES II 38
BRIDLE RIDGE ESTATES 38
GOLDEN HILLS SUBDIVISION 30

Frequently asked questions about Piedmont tap water

Is Piedmont tap water safe to drink?

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

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

What contaminants are in Piedmont's water?

The contaminants EPA monitoring detected in Piedmont include Nitrate, Fluoride, Copper, Barium, TTHM. The full list, with the highest level found 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.