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Tap water quality report

Big Bend Water

EPA monitoring tested this supplier for 70 contaminants and detected 11. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

70
contaminants tested
11
detected
80
people served
7
health-based violations
South Dakota rankingsLead in South DakotaPFAS in South Dakota
Water source
Ground water
Ownership
Native American

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

7
health-based violations
190
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2010-10-01 → 2010-10-31
MCL Health-based Resolved 2010-10-01 → 2010-10-31
MCL Health-based Resolved 2003-03-01 → 2003-03-31
MCL Health-based Resolved 2003-03-01 → 2003-03-31
MCL Health-based Resolved 2003-03-01 → 2003-03-31
MCL Health-based Resolved 2003-03-01 → 2003-03-31
MCL Health-based Archived 1998-06-01 → 1998-06-30
MR Monitoring Resolved 2025-01-01 → 2025-12-31
MR Monitoring Archived 2023-01-01 → 2025-12-31
MR Monitoring Archived 2023-01-01 → 2025-12-31

Other contaminants detected

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 this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Copper
200 µg/L 15%
of the EPA limit 1300 µg/L
worst single sample: 830 µg/L
21/21 SYR4 2016–2019
Lead
1.433 µg/L 9.6%
of the EPA limit 15 µg/L
worst single sample: 2.5 µg/L
12/21 SYR4 2016–2019
Lead
0.00018 mg/L 1.2%
of the EPA limit 0.0150 mg/L
 9/9 LCR 2025
Barium
10.195 µg/L 0.5%
of the EPA limit 2000 µg/L
worst single sample: 10.2 µg/L
2/2 SYR4 2017–2019
Chromium
1.1525 µg/L 1.2%
of the EPA limit 100 µg/L
worst single sample: 1.2 µg/L
2/2 SYR4 2017–2019
Gross Alpha, Excl. Radon And U
3 pCi/L 20%
of the EPA limit 15 pCi/L
 2/3 SYR4 2013–2019
Selenium
0.9900 µg/L 2%
of the EPA limit 50 µg/L
worst single sample: 1 µg/L
2/2 SYR4 2017–2019
Fluoride
1830 µg/L 46%
of the EPA limit 4000 µg/L
 1/1 SYR4 2019
Mercury
0.1800 µg/L 9%
of the EPA limit 2 µg/L
 1/2 SYR4 2017–2019
TTHM
5 µg/L 6.3%
of the EPA limit 80 µg/L
 1/2 SYR4 2014–2017
Total Haloacetic Acids (HAA5)
4.5 µg/L 7.5%
of the EPA limit 60 µg/L
 1/2 SYR4 2014–2017
59 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAntimony, TotalArsenicAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMethoxychlorNitrateNitrate-NitriteNitriteOxamylPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
BIG EAGLE, DON
Phone
605-245-2544
Email
[email protected]

Frequently asked questions about Big Bend Water

Is Big Bend Water tap water safe to drink?

EPA monitoring detected 11 contaminants in Big Bend Water's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Big Bend Water's water?

EPA monitoring detected Copper, Lead, Lead, Barium, Chromium, and others. The full list with the level and data source for each is above.

How many people does Big Bend Water serve?

Big Bend Water reports serving 80 people in South Dakota, per its EPA record.

Has Big Bend Water had any water quality violations?

The EPA has 190 violations on file for Big Bend Water, of which 7 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.

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.