← St. John, IN

Tap water quality report

ZIP 46373 — St. John, IN

EPA monitoring across the 1 water supplier serving ZIP 46373 in St. John, IN detected 10 contaminants. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier below, with the EPA limit for each.

1
water supplier
25,700
people served
10
contaminants found

What was found in ZIP 46373

The level at this ZIP's main supplier, the highest level anywhere in it, the EPA limit for each, and where the figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Copper
945.9999999999999 µg/L 73%
of the EPA limit 1300 µg/L
Main supplier: ST. JOHN MUNICIPAL WATER UTILITY · 25,700 people · 2017
1/1 SYR4
Fluoride
784 µg/L 20%
of the EPA limit 4000 µg/L
Main supplier: ST. JOHN MUNICIPAL WATER UTILITY · 25,700 people · 2017
1/1 SYR4
Lithium
83.8 µg/L
No EPA limit set
Main supplier: ST. JOHN MUNICIPAL WATER UTILITY · 25,700 people · 2025
1/1 UCMR-5
Barium
23.4 µg/L 1.2%
of the EPA limit 2000 µg/L
Main supplier: ST. JOHN MUNICIPAL WATER UTILITY · 25,700 people · 2017
1/1 SYR4
TTHM
22.225 µg/L 28%
of the EPA limit 80 µg/L
Main supplier: ST. JOHN MUNICIPAL WATER UTILITY · 25,700 people · 2019
1/1 SYR4
Total Haloacetic Acids (HAA5)
14.029999999999996 µg/L 23%
of the EPA limit 60 µg/L
Main supplier: ST. JOHN MUNICIPAL WATER UTILITY · 25,700 people · 2019
1/1 SYR4
Lead
13.1 µg/L 87%
of the EPA limit 15 µg/L
Main supplier: ST. JOHN MUNICIPAL WATER UTILITY · 25,700 people · 2017
1/1 SYR4
Gross Alpha, Excl. Radon And U
1.892 pCi/L 13%
of the EPA limit 15 pCi/L
Main supplier: ST. JOHN MUNICIPAL WATER UTILITY · 25,700 people · 2018
1/1 SYR4
Di(2-ethylhexyl) Phthalate
1.5 µg/L 25%
of the EPA limit 6 µg/L
Main supplier: ST. JOHN MUNICIPAL WATER UTILITY · 25,700 people · 2018
1/1 SYR4
Lead
0.0027 mg/L 18%
of the EPA limit 0.0150 mg/L
Main supplier: ST. JOHN MUNICIPAL WATER UTILITY · 25,700 people · 2023
1/1 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.

Water suppliers serving ZIP 46373

SupplierStatePopulation served
ST. JOHN MUNICIPAL WATER UTILITY IN 25,700

Frequently asked questions about ZIP 46373 tap water

Is the tap water in ZIP 46373 safe to drink?

EPA testing detected 10 contaminants across the water suppliers serving ZIP 46373. 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 46373?

1 public water supplier report EPA drinking-water monitoring for ZIP 46373. Each is listed above with its population served.

What contaminants are in ZIP 46373's water?

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