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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 level at the main supplier 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 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
Copper
815.2 µg/L 63%
of the EPA limit 1300 µg/L
Main supplier: CITIZENS WATER - WHITESTOWN · 5,880 people · 2019
2/3 SYR4
Nitrate
770 µg/L 7.7%
of the EPA limit 10000 µg/L
Highest in the city: PINE RIDGE · 135 people · 2019
1/3 SYR4
Fluoride
717.8 µg/L 18%
of the EPA limit 4000 µg/L
Highest in the city: PINE RIDGE · 135 people · 2018
2/3 SYR4
Barium
319 µg/L 16%
of the EPA limit 2000 µg/L
Highest in the city: ZIONSVILLE MHP TRUST · 57 people · 2018
2/3 SYR4
TTHM
101.62 µg/L 127%
of the EPA limit, at the 95th percentile of samples — 80 µg/L
Main supplier: CITIZENS WATER - WHITESTOWN · 5,880 people · 2019
2/3 SYR4
Total Haloacetic Acids (HAA5)
88 µg/L 147%
of the EPA limit, at the 95th percentile of samples — 60 µg/L
Main supplier: CITIZENS WATER - WHITESTOWN · 5,880 people · 2019
2/3 SYR4
Gross Alpha, Excl. Radon And U
9.24 pCi/L 62%
of the EPA limit 15 pCi/L
Highest in the city: ZIONSVILLE MHP TRUST · 57 people · 2018
1/3 SYR4
Lead
5.74 µg/L 38%
of the EPA limit 15 µg/L
Main supplier: CITIZENS WATER - WHITESTOWN · 5,880 people · 2019
1/3 SYR4
Arsenic
5.53 µg/L 55%
of the EPA limit 10 µg/L
Highest in the city: ZIONSVILLE MHP TRUST · 57 people · 2018
2/3 SYR4
Pfba
0.0056 µg/L
No EPA limit set
Main supplier: CITIZENS WATER - WHITESTOWN · 5,880 people · 2025
1/3 UCMR-5
Pfpea
0.0050 µg/L
No EPA limit set
Main supplier: CITIZENS WATER - WHITESTOWN · 5,880 people · 2025
1/3 UCMR-5
Lead
0.00033 mg/L 2.2%
of the EPA limit 0.0150 mg/L
Main supplier: CITIZENS WATER - WHITESTOWN · 5,880 people · 2025
Highest in the city: 0.0046 mg/L — PINE RIDGE · 135 people · 2024
3/3 LCR
Pfhxa
0.0040 µg/L
No EPA limit set
Main supplier: CITIZENS WATER - WHITESTOWN · 5,880 people · 2025
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 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 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, 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.