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Tap water quality report

Zionsville, IN

EPA monitoring detected 13 contaminants across the 3 water suppliers serving Zionsville. A detection doesn't automatically mean the water is unsafe — see the highest level found for each below, with its EPA source and period.

3
water suppliers
6,072
people served
13
contaminants found
Indiana rankings Lead in Indiana PFAS in Indiana

What was found in Zionsville'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
Copper
927 µg/L 71%
of the EPA limit 1300 µg/L
 2/3 SYR4
Nitrate
770 µg/L 7.7%
of the EPA limit 10000 µg/L
 1/3 SYR4
Fluoride
722 µg/L 18%
of the EPA limit 4000 µg/L
 2/3 SYR4
Barium
320 µg/L 16%
of the EPA limit 2000 µg/L
 2/3 SYR4
Total Haloacetic Acids (HAA5)
128.8 µg/L 215%
of the EPA limit, in the worst sample — 60 µg/L
 2/3 SYR4
TTHM
122 µg/L 153%
of the EPA limit, in the worst sample — 80 µg/L
 2/3 SYR4
Gross Alpha, Excl. Radon And U
9.24 pCi/L 62%
of the EPA limit 15 pCi/L
 1/3 SYR4
Lead
7 µg/L 47%
of the EPA limit 15 µg/L
 1/3 SYR4
Arsenic
5.6 µg/L 56%
of the EPA limit 10 µg/L
 2/3 SYR4
Pfba
0.0056 µg/L
No EPA limit set
 1/3 UCMR-5
Pfpea
0.0050 µg/L
No EPA limit set
 1/3 UCMR-5
Lead
0.0046 mg/L 31%
of the EPA limit 0.0150 mg/L
 3/3 LCR
Pfhxa
0.0040 µg/L
No EPA limit set
 1/3 UCMR-5
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 Zionsville

SupplierPopulation served
CITIZENS WATER - WHITESTOWN 5,880
PINE RIDGE 135
ZIONSVILLE MHP TRUST 57

Frequently asked questions about Zionsville tap water

Is Zionsville tap water safe to drink?

EPA testing detected 13 contaminants in the water serving Zionsville. 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 Zionsville?

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

What contaminants are in Zionsville's water?

The contaminants EPA monitoring detected in Zionsville include Copper, Nitrate, Fluoride, Barium, Total Haloacetic Acids (HAA5). 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.