Is Madison, IN Tap Water Safe? Quality & Contaminants

What was found in Madison'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.

Contaminant	Level vs EPA limit	Suppliers	Source
Nitrate	2150 µg/L 22% of the EPA limit 10000 µg/L Main supplier: MADISON WATER DEPARTMENT · 15,323 people · 2019 Highest in the city: 3900 µg/L — KENT WATER COMPANY · 6,750 people · 2019	3/4	SYR4
Fluoride	752.15 µg/L 19% of the EPA limit 4000 µg/L Main supplier: MADISON WATER DEPARTMENT · 15,323 people · 2017 Highest in the city: 770.05 µg/L — KENT WATER COMPANY · 6,750 people · 2017	3/4	SYR4
Copper	421.89999999999975 µg/L 32% of the EPA limit 1300 µg/L Main supplier: MADISON WATER DEPARTMENT · 15,323 people · 2017	4/4	SYR4
Barium	98 µg/L 4.9% of the EPA limit 2000 µg/L Main supplier: MADISON WATER DEPARTMENT · 15,323 people · 2017	2/4	SYR4
Lead	5.799999999999992 µg/L 39% of the EPA limit 15 µg/L Main supplier: MADISON WATER DEPARTMENT · 15,323 people · 2017 Highest in the city: 35.959999999999994 µg/L — RYKERS RIDGE WATER COMPANY · 2,050 people · 2018	4/4	SYR4
TTHM	21.15 µg/L 26% of the EPA limit 80 µg/L Main supplier: MADISON WATER DEPARTMENT · 15,323 people · 2019 Highest in the city: 27.549999999999972 µg/L — MADISON STATE HOSPITAL · 1,375 people · 2019	4/4	SYR4
Total Haloacetic Acids (HAA5)	10.939999999999994 µg/L 18% of the EPA limit 60 µg/L Main supplier: MADISON WATER DEPARTMENT · 15,323 people · 2019 Highest in the city: 10.944999999999999 µg/L — RYKERS RIDGE WATER COMPANY · 2,050 people · 2019	4/4	SYR4
Gross Alpha, Excl. Radon And U	1.52765 pCi/L 10% of the EPA limit 15 pCi/L Main supplier: MADISON WATER DEPARTMENT · 15,323 people · 2017 Highest in the city: 4.08 pCi/L — MADISON STATE HOSPITAL · 1,375 people · 2018	3/4	SYR4
Chromium	2 µg/L 2% of the EPA limit 100 µg/L Main supplier: MADISON WATER DEPARTMENT · 15,323 people · 2017	1/4	SYR4
Arsenic	1.4 µg/L 14% of the EPA limit 10 µg/L Main supplier: MADISON WATER DEPARTMENT · 15,323 people · 2017	3/4	SYR4
Combined Radium (-226 And -228)	1.34 pCi/L 27% of the EPA limit 5 pCi/L Highest in the city: MADISON STATE HOSPITAL · 1,375 people · 2018	1/4	SYR4
Chloroform	1.18 µg/L No EPA limit set Main supplier: MADISON WATER DEPARTMENT · 15,323 people · 2014	1/4	SYR4
Dibromochloromethane	1.17 µg/L No EPA limit set Main supplier: MADISON WATER DEPARTMENT · 15,323 people · 2014	1/4	SYR4
Selenium	1.1 µg/L 2.2% of the EPA limit 50 µg/L Main supplier: MADISON WATER DEPARTMENT · 15,323 people · 2017	1/4	SYR4
Bromodichloromethane	0.8850 µg/L No EPA limit set Main supplier: MADISON WATER DEPARTMENT · 15,323 people · 2014	1/4	SYR4
PFBS	0.0085 µg/L No EPA limit set Main supplier: MADISON WATER DEPARTMENT · 15,323 people · 2024	1/4	UCMR-5
PFOA	0.0046 µg/L No EPA limit set Main supplier: MADISON WATER DEPARTMENT · 15,323 people · 2024	1/4	UCMR-5
Lead	0.0018 mg/L 12% of the EPA limit 0.0150 mg/L Main supplier: MADISON WATER DEPARTMENT · 15,323 people · 2023 Highest in the city: 0.0023 mg/L — RYKERS RIDGE WATER COMPANY · 2,050 people · 2024	4/4	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. 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 Madison

Supplier	Population served
MADISON WATER DEPARTMENT	15,323
KENT WATER COMPANY	6,750
RYKERS RIDGE WATER COMPANY	2,050
MADISON STATE HOSPITAL	1,375

Frequently asked questions about Madison tap water

Is Madison tap water safe to drink?

EPA testing detected 18 contaminants in the water serving Madison. 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 Madison?

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

What contaminants are in Madison's water?

The contaminants EPA monitoring detected in Madison include Nitrate, Fluoride, Copper, Barium, Lead. 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.