Is Miller, SD Tap Water Safe? Quality & Contaminants

What was found in Miller'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
Copper	733 µg/L 56% of the EPA limit 1300 µg/L Main supplier: MID-DAKOTA RURAL WATER · 11,833 people · 2019	7/7	SYR4
Fluoride	450 µg/L 11% of the EPA limit 4000 µg/L Main supplier: MID-DAKOTA RURAL WATER · 11,833 people · 2019	1/7	SYR4
Nitrate	300 µg/L 3% of the EPA limit 10000 µg/L Main supplier: MID-DAKOTA RURAL WATER · 11,833 people · 2019	1/7	SYR4
TTHM	71.945 µg/L 90% of the EPA limit 80 µg/L Main supplier: MID-DAKOTA RURAL WATER · 11,833 people · 2019	7/7	SYR4
Lithium	60 µg/L No EPA limit set Main supplier: MID-DAKOTA RURAL WATER · 11,833 people · 2023	1/7	UCMR-5
Total Haloacetic Acids (HAA5)	48.6 µg/L 81% of the EPA limit 60 µg/L Main supplier: MID-DAKOTA RURAL WATER · 11,833 people · 2019 Highest in the city: 51.89 µg/L — SAINT LAWRENCE · 198 people · 2019	7/7	SYR4
Barium	42.4 µg/L 2.1% of the EPA limit 2000 µg/L Main supplier: MID-DAKOTA RURAL WATER · 11,833 people · 2013	1/7	SYR4
Lead	3.52 µg/L 23% of the EPA limit 15 µg/L Main supplier: MID-DAKOTA RURAL WATER · 11,833 people · 2019 Highest in the city: 21.13 µg/L — SAINT LAWRENCE · 198 people · 2018	7/7	SYR4
Gross Alpha, Excl. Radon And U	3.8 pCi/L 25% of the EPA limit 15 pCi/L Main supplier: MID-DAKOTA RURAL WATER · 11,833 people · 2016	1/7	SYR4
Arsenic	3 µg/L 30% of the EPA limit 10 µg/L Main supplier: MID-DAKOTA RURAL WATER · 11,833 people · 2013	1/7	SYR4
Chromium	1.6 µg/L 1.6% of the EPA limit 100 µg/L Main supplier: MID-DAKOTA RURAL WATER · 11,833 people · 2013	1/7	SYR4
Selenium	1.4 µg/L 2.8% of the EPA limit 50 µg/L Main supplier: MID-DAKOTA RURAL WATER · 11,833 people · 2013	1/7	SYR4
Antimony, Total	0.4000 µg/L 6.7% of the EPA limit 6 µg/L Main supplier: MID-DAKOTA RURAL WATER · 11,833 people · 2013	1/7	SYR4
Lead	0.0020 mg/L 13% of the EPA limit 0.0150 mg/L Main supplier: MID-DAKOTA RURAL WATER · 11,833 people · 2025 Highest in the city: 0.0100 mg/L — TULARE · 211 people · 2024	7/7	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 Miller

Supplier	Population served
MID-DAKOTA RURAL WATER	11,833
MILLER	1,349
BLUNT	350
ALPENA	212
TULARE	211
SAINT LAWRENCE	198
HITCHCOCK	112

Frequently asked questions about Miller tap water

Is Miller tap water safe to drink?

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

7 public water suppliers report drinking-water monitoring for Miller, South Dakota to the EPA. Each is listed above with its population served.

What contaminants are in Miller's water?

The contaminants EPA monitoring detected in Miller include Copper, Fluoride, Nitrate, TTHM, Lithium. 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.