Is Monticello, IN Tap Water Safe? Quality & Contaminants

What was found in Monticello'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	763 µg/L 7.6% of the EPA limit 10000 µg/L Main supplier: MONTICELLO WATER WORKS · 5,300 people · 2019 Highest in the city: 2510 µg/L — LYNN HILL COURT & CHARLES MANOR · 44 people · 2019	5/8	SYR4
Fluoride	830.65 µg/L 21% of the EPA limit 4000 µg/L Main supplier: MONTICELLO WATER WORKS · 5,300 people · 2017	8/8	SYR4
Copper	663.15 µg/L 51% of the EPA limit 1300 µg/L Main supplier: MONTICELLO WATER WORKS · 5,300 people · 2019	5/8	SYR4
Barium	143.95 µg/L 7.2% of the EPA limit 2000 µg/L Main supplier: MONTICELLO WATER WORKS · 5,300 people · 2017 Highest in the city: 270.7 µg/L — VALLEY VIEW MOBILE HOME PARK · 50 people · 2019	8/8	SYR4
Lead	57.9 µg/L 386% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: MONTICELLO WATER WORKS · 5,300 people · 2019	4/8	SYR4
TTHM	30.55 µg/L 38% of the EPA limit 80 µg/L Main supplier: MONTICELLO WATER WORKS · 5,300 people · 2019	1/8	SYR4
Total Haloacetic Acids (HAA5)	12.7 µg/L 21% of the EPA limit 60 µg/L Main supplier: MONTICELLO WATER WORKS · 5,300 people · 2019	1/8	SYR4
Chromium	8.9 µg/L 8.9% of the EPA limit 100 µg/L Highest in the city: VALLEY VIEW MOBILE HOME PARK · 50 people · 2019	1/8	SYR4
Arsenic	3.585 µg/L 36% of the EPA limit 10 µg/L Main supplier: MONTICELLO WATER WORKS · 5,300 people · 2017 Highest in the city: 8.77 µg/L — ROYAL OAKS HOMEOWNERS ASSN., INC. · 390 people · 2019	5/8	SYR4
Gross Alpha, Excl. Radon And U	2.365 pCi/L 16% of the EPA limit 15 pCi/L Main supplier: MONTICELLO WATER WORKS · 5,300 people · 2017 Highest in the city: 8.22 pCi/L — LAKE HILL PARK - THAYER INC. · 104 people · 2019	5/8	SYR4
Gross Beta Particle Activity	3.7 pCi/L No EPA limit set Highest in the city: THE LANDINGS HOMEOWNERS ASSOCIATION · 159 people · 2017	1/8	SYR4
Combined Radium (-226 And -228)	3.21 pCi/L 64% of the EPA limit 5 pCi/L Highest in the city: ROYAL OAKS HOMEOWNERS ASSN., INC. · 390 people · 2017	1/8	SYR4
Thallium, Total	0.3000 µg/L 15% of the EPA limit 2 µg/L Main supplier: MONTICELLO WATER WORKS · 5,300 people · 2017 Highest in the city: 0.8000 µg/L — LAKEWOOD MOBILE HOME PARK · 25 people · 2019	2/8	SYR4
Lead	0.0020 mg/L 13% of the EPA limit 0.0150 mg/L Main supplier: MONTICELLO WATER WORKS · 5,300 people · 2025 Highest in the city: 0.0065 mg/L — ROYAL OAKS HOMEOWNERS ASSN., INC. · 390 people · 2025	8/8	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 Monticello

Supplier	Population served
MONTICELLO WATER WORKS	5,300
ROYAL OAKS HOMEOWNERS ASSN., INC.	390
THE LANDINGS HOMEOWNERS ASSOCIATION	159
LAKE HILL PARK - THAYER INC.	104
VALLEY VIEW MOBILE HOME PARK	50
LYNN HILL COURT & CHARLES MANOR	44
LAKEWOOD MOBILE HOME PARK	25
SCENIC VIEW MOBILE HOME COMMUNITY	25

Frequently asked questions about Monticello tap water

Is Monticello tap water safe to drink?

EPA testing detected 14 contaminants in the water serving Monticello. 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 Monticello?

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

What contaminants are in Monticello's water?

The contaminants EPA monitoring detected in Monticello 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.