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Tap water quality report

ZIP 57042 — Madison, SD

EPA monitoring across the 2 water suppliers serving ZIP 57042 in Madison, SD detected 12 contaminants. A detection doesn't automatically mean the water is unsafe — see the highest level found below, with the EPA limit for each.

2
water suppliers
11,991
people served
12
contaminants found

What was found in ZIP 57042

The highest level seen across the suppliers serving this ZIP, the EPA limit for each, and where the figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Nitrate
6000 µg/L 60%
of the EPA limit 10000 µg/L
 2/2 SYR4
Copper
640 µg/L 49%
of the EPA limit 1300 µg/L
 2/2 SYR4
TTHM
117 µg/L 146%
of the EPA limit, in the worst sample — 80 µg/L
 2/2 SYR4
Lithium
87 µg/L
No EPA limit set
 2/2 UCMR-5
Lead
45.5 µg/L 303%
of the EPA limit, in the worst sample — 15 µg/L
 2/2 SYR4
Barium
22.8 µg/L 1.1%
of the EPA limit 2000 µg/L
 1/2 SYR4
Total Haloacetic Acids (HAA5)
22.6 µg/L 38%
of the EPA limit 60 µg/L
 2/2 SYR4
Selenium
3.5 µg/L 7%
of the EPA limit 50 µg/L
 1/2 SYR4
Gross Alpha, Excl. Radon And U
1.6 pCi/L 11%
of the EPA limit 15 pCi/L
 1/2 SYR4
Chromium
0.7400 µg/L 0.7%
of the EPA limit 100 µg/L
 1/2 SYR4
Antimony, Total
0.5000 µg/L 8.3%
of the EPA limit 6 µg/L
 1/2 SYR4
Lead
0.0020 mg/L 13%
of the EPA limit 0.0150 mg/L
 2/2 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.

Water suppliers serving ZIP 57042

SupplierStatePopulation served
MADISON SD 6,191
BIG SIOUX COMMUNITY WATER SYSTEM SD 5,800

Frequently asked questions about ZIP 57042 tap water

Is the tap water in ZIP 57042 safe to drink?

EPA testing detected 12 contaminants across the water suppliers serving ZIP 57042. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and your utility's annual Consumer Confidence Report for the official status.

Which water suppliers serve ZIP 57042?

2 public water suppliers report EPA drinking-water monitoring for ZIP 57042. Each is listed above with its population served.

What contaminants are in ZIP 57042's water?

EPA monitoring detected Nitrate, Copper, TTHM, Lithium, Lead, and others across this ZIP's suppliers. The full list with levels and sources is above.