Is Malta, MT Tap Water Safe? Quality & Contaminants

What was found in Malta'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	375 µg/L 9.4% of the EPA limit 4000 µg/L Main supplier: MALTA CITY OF · 1,800 people · 2013 Highest in the city: 930 µg/L — EAST MALTA COLONY · 47 people · 2019	2/2	SYR4
Nitrate	910 µg/L 9.1% of the EPA limit 10000 µg/L Highest in the city: EAST MALTA COLONY · 47 people · 2013	1/2	SYR4
Nitrate-Nitrite	848.5 µg/L 8.5% of the EPA limit 10000 µg/L Main supplier: MALTA CITY OF · 1,800 people · 2019 Highest in the city: 867.5 µg/L — EAST MALTA COLONY · 47 people · 2019	2/2	SYR4
Copper	650 µg/L 50% of the EPA limit 1300 µg/L Main supplier: MALTA CITY OF · 1,800 people · 2014	2/2	SYR4
Lead	93 µg/L 620% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: MALTA CITY OF · 1,800 people · 2014	1/2	SYR4
Barium	50 µg/L 2.5% of the EPA limit 2000 µg/L Main supplier: MALTA CITY OF · 1,800 people · 2013	1/2	SYR4
TTHM	25.3 µg/L 32% of the EPA limit 80 µg/L Main supplier: MALTA CITY OF · 1,800 people · 2019	1/2	SYR4
Combined Uranium	13.55 µg/L 45% of the EPA limit 30 µg/L Main supplier: MALTA CITY OF · 1,800 people · 2016	2/2	SYR4
Gross Alpha, Excl. Radon And U	6.085 pCi/L 41% of the EPA limit 15 pCi/L Main supplier: MALTA CITY OF · 1,800 people · 2016 Highest in the city: 11 pCi/L — EAST MALTA COLONY · 47 people · 2019	2/2	SYR4
Dibromochloromethane	9.68 µg/L No EPA limit set Main supplier: MALTA CITY OF · 1,800 people · 2019	1/2	SYR4
Bromodichloromethane	6.59 µg/L No EPA limit set Main supplier: MALTA CITY OF · 1,800 people · 2019	1/2	SYR4
Bromoform	6.36 µg/L No EPA limit set Main supplier: MALTA CITY OF · 1,800 people · 2019	1/2	SYR4
Total Haloacetic Acids (HAA5)	5.565 µg/L 9.3% of the EPA limit 60 µg/L Main supplier: MALTA CITY OF · 1,800 people · 2019	1/2	SYR4
Dibromoacetic Acid	4.205 µg/L No EPA limit set Main supplier: MALTA CITY OF · 1,800 people · 2019	1/2	SYR4
Chloroform	4.175 µg/L No EPA limit set Main supplier: MALTA CITY OF · 1,800 people · 2019	1/2	SYR4
Selenium	2 µg/L 4% of the EPA limit 50 µg/L Main supplier: MALTA CITY OF · 1,800 people · 2013	1/2	SYR4
Trichloroacetic Acid	1.262 µg/L No EPA limit set Main supplier: MALTA CITY OF · 1,800 people · 2019	1/2	SYR4
Dichloroacetic Acid	1.088 µg/L No EPA limit set Main supplier: MALTA CITY OF · 1,800 people · 2019	1/2	SYR4
Arsenic	1 µg/L 10% of the EPA limit 10 µg/L Highest in the city: EAST MALTA COLONY · 47 people · 2019	1/2	SYR4
Lead	0.0020 mg/L 13% of the EPA limit 0.0150 mg/L Main supplier: MALTA CITY OF · 1,800 people · 2026	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 Malta

Supplier	Population served
MALTA CITY OF	1,800
EAST MALTA COLONY	47

Frequently asked questions about Malta tap water

Is Malta tap water safe to drink?

EPA testing detected 20 contaminants in the water serving Malta. 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 Malta?

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

What contaminants are in Malta's water?

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