Is Britton, SD Tap Water Safe? Quality & Contaminants

What was found in Britton'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	711.5 µg/L 55% of the EPA limit 1300 µg/L Main supplier: BROWN-DAY-MARSHALL RWS · 5,673 people · 2019 Highest in the city: 866 µg/L — PEEVER · 140 people · 2017	7/7	SYR4
Nitrate	800 µg/L 8% of the EPA limit 10000 µg/L Highest in the city: SUNSET COLONY · 140 people · 2012	1/7	SYR4
Fluoride	590 µg/L 15% of the EPA limit 4000 µg/L Main supplier: BROWN-DAY-MARSHALL RWS · 5,673 people · 2019	2/7	SYR4
Lithium	137 µg/L No EPA limit set Main supplier: BROWN-DAY-MARSHALL RWS · 5,673 people · 2023	1/7	UCMR-5
Arsenic	85.9 µg/L 859% of the EPA limit, at the 95th percentile of samples — 10 µg/L Highest in the city: SUNSET COLONY · 140 people · 2012	1/7	SYR4
Nitrite	30 µg/L 3% of the EPA limit 1000 µg/L Main supplier: BROWN-DAY-MARSHALL RWS · 5,673 people · 2019	1/7	SYR4
Barium	14 µg/L 0.7% of the EPA limit 2000 µg/L Main supplier: BROWN-DAY-MARSHALL RWS · 5,673 people · 2013	2/7	SYR4
Chromium	4.7 µg/L 4.7% of the EPA limit 100 µg/L Main supplier: BROWN-DAY-MARSHALL RWS · 5,673 people · 2013 Highest in the city: 13.4105 µg/L — SUNSET COLONY · 140 people · 2019	2/7	SYR4
Lead	13.045 µg/L 87% of the EPA limit 15 µg/L Main supplier: BROWN-DAY-MARSHALL RWS · 5,673 people · 2019	7/7	SYR4
Total Haloacetic Acids (HAA5)	8.7165 µg/L 15% of the EPA limit 60 µg/L Main supplier: BROWN-DAY-MARSHALL RWS · 5,673 people · 2019 Highest in the city: 10.933 µg/L — BRITTON · 1,215 people · 2019	6/7	SYR4
TTHM	4.315 µg/L 5.4% of the EPA limit 80 µg/L Main supplier: BROWN-DAY-MARSHALL RWS · 5,673 people · 2019 Highest in the city: 4.429 µg/L — BRITTON · 1,215 people · 2019	6/7	SYR4
Selenium	0.7000 µg/L 1.4% of the EPA limit 50 µg/L Main supplier: BROWN-DAY-MARSHALL RWS · 5,673 people · 2013 Highest in the city: 0.9000 µg/L — SUNSET COLONY · 140 people · 2019	2/7	SYR4
Lead	0.0020 mg/L 13% of the EPA limit 0.0150 mg/L Main supplier: BROWN-DAY-MARSHALL RWS · 5,673 people · 2025 Highest in the city: 0.0060 mg/L — CLAREMONT · 108 people · 2023	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 Britton

Supplier	Population served
BROWN-DAY-MARSHALL RWS	5,673
BRITTON	1,215
PEEVER	140
SUNSET COLONY	140
CLAREMONT	108
LAKE CITY	45
AMHERST WATER COMPANY	40

Frequently asked questions about Britton tap water

Is Britton tap water safe to drink?

EPA testing detected 13 contaminants in the water serving Britton. 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 Britton?

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

What contaminants are in Britton's water?

The contaminants EPA monitoring detected in Britton include Copper, Nitrate, Fluoride, Lithium, Arsenic. 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.