Is Morton, MN Tap Water Safe? Quality & Contaminants

What was found in Morton'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
Fluoride	300 µg/L 7.5% of the EPA limit 4000 µg/L Main supplier: LOWER SIOUX · 4,000 people · 2018 Highest in the city: 1540 µg/L — Morton · 400 people · 2019	2/2	SYR4
Copper	1300 µg/L 100% of the EPA limit 1300 µg/L Main supplier: LOWER SIOUX · 4,000 people · 2019	2/2	SYR4
Nitrate	1210 µg/L 12% of the EPA limit 10000 µg/L Main supplier: LOWER SIOUX · 4,000 people · 2018	1/2	SYR4
Nitrate-Nitrite	780 µg/L 7.8% of the EPA limit 10000 µg/L Main supplier: LOWER SIOUX · 4,000 people · 2017	2/2	SYR4
Lead	84.8 µg/L 565% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: LOWER SIOUX · 4,000 people · 2019	2/2	SYR4
Lithium	77.5 µg/L No EPA limit set Main supplier: LOWER SIOUX · 4,000 people · 2024	1/2	UCMR-5
Barium	29 µg/L 1.5% of the EPA limit 2000 µg/L Main supplier: LOWER SIOUX · 4,000 people · 2018 Highest in the city: 34.6 µg/L — Morton · 400 people · 2012	2/2	SYR4
Nitrite	20 µg/L 2% of the EPA limit 1000 µg/L Main supplier: LOWER SIOUX · 4,000 people · 2017	1/2	SYR4
Chloroform	12.9 µg/L No EPA limit set Highest in the city: Morton · 400 people · 2019	1/2	SYR4
Bromodichloromethane	12.4 µg/L No EPA limit set Highest in the city: Morton · 400 people · 2019	1/2	SYR4
Dibromochloromethane	7.78 µg/L No EPA limit set Highest in the city: Morton · 400 people · 2019	1/2	SYR4
Trichloroacetic Acid	3.76 µg/L No EPA limit set Highest in the city: Morton · 400 people · 2019	1/2	SYR4
TTHM	2.9 µg/L 3.6% of the EPA limit 80 µg/L Main supplier: LOWER SIOUX · 4,000 people · 2019	1/2	SYR4
Dichloroacetic Acid	2.75 µg/L No EPA limit set Highest in the city: Morton · 400 people · 2019	1/2	SYR4
Total Haloacetic Acids (HAA5)	1.925 µg/L 3.2% of the EPA limit 60 µg/L Main supplier: LOWER SIOUX · 4,000 people · 2018	1/2	SYR4
Combined Radium (-226 And -228)	1.58 pCi/L 32% of the EPA limit 5 pCi/L Main supplier: LOWER SIOUX · 4,000 people · 2013	1/2	SYR4
Dibromoacetic Acid	1.38 µg/L No EPA limit set Highest in the city: Morton · 400 people · 2019	1/2	SYR4
Bromoform	1.29 µg/L No EPA limit set Highest in the city: Morton · 400 people · 2019	1/2	SYR4
Arsenic	1.04 µg/L 10% of the EPA limit 10 µg/L Highest in the city: Morton · 400 people · 2012	1/2	SYR4
Gross Alpha, Excl. Radon And U	0.6700 pCi/L 4.5% of the EPA limit 15 pCi/L Main supplier: LOWER SIOUX · 4,000 people · 2013	1/2	SYR4
Lead	0.0014 mg/L 9.3% of the EPA limit 0.0150 mg/L Main supplier: LOWER SIOUX · 4,000 people · 2025 Highest in the city: 0.0140 mg/L — Morton · 400 people · 2024	2/2	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 Morton

Supplier	Population served
LOWER SIOUX	4,000
Morton	400

Frequently asked questions about Morton tap water

Is Morton tap water safe to drink?

EPA testing detected 21 contaminants in the water serving Morton. 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 Morton?

2 public water suppliers report drinking-water monitoring for Morton, Minnesota to the EPA. Each is listed above with its population served.

What contaminants are in Morton's water?

The contaminants EPA monitoring detected in Morton include Fluoride, Copper, Nitrate, Nitrate-Nitrite, 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.