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Tap water quality report

Mni Wiconi Wtp / Coreline

EPA monitoring tested this supplier for 71 contaminants and detected 11. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

71
contaminants tested
11
detected
25
people served
3
health-based violations
South Dakota rankingsLead in South DakotaPFAS in South Dakota
Water source
Surface water
Ownership
Federal government

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.

3
health-based violations
16
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2002-08-01 → 2002-08-31
TT Health-based Resolved 2002-08-01 → 2002-08-31
TT Health-based Resolved 2002-08-01 → 2002-08-31
MR Monitoring Resolved 2023-07-01 → 2023-09-30
MON Monitoring Resolved 2022-11-01 → 2022-11-30
MR Monitoring Resolved 2022-11-01 → 2022-11-30
MR Monitoring Resolved 2022-09-29
MR Monitoring Resolved 2022-01-01 → 2022-12-31
MR Monitoring Resolved 2022-01-01 → 2022-12-31
MR Monitoring Resolved 2020-12-30

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
TTHM
57.775 µg/L 72%
of the EPA limit 80 µg/L
worst single sample: 71.7 µg/L
22/22 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
33 µg/L 55%
of the EPA limit 60 µg/L
worst single sample: 38.1 µg/L
22/22 SYR4 2012–2019
Copper
797.5 µg/L 61%
of the EPA limit 1300 µg/L
worst single sample: 1100 µg/L
12/12 SYR4 2016–2017
Lead
6.945 µg/L 46%
of the EPA limit 15 µg/L
worst single sample: 8.1 µg/L
12/12 SYR4 2016–2017
Lead
0.0020 mg/L 13%
of the EPA limit 0.0150 mg/L
 10/10 LCR 2025
Antimony, Total
0.3569 µg/L 5.9%
of the EPA limit 6 µg/L
worst single sample: 0.3700 µg/L
4/4 SYR4 2015–2019
Barium
37.175 µg/L 1.9%
of the EPA limit 2000 µg/L
worst single sample: 37.7 µg/L
4/4 SYR4 2015–2019
Fluoride
755 µg/L 19%
of the EPA limit 4000 µg/L
worst single sample: 800 µg/L
4/4 SYR4 2015–2019
Selenium
1.4475 µg/L 2.9%
of the EPA limit 50 µg/L
worst single sample: 1.5 µg/L
4/4 SYR4 2015–2019
Chromium
3.74 µg/L 3.7%
of the EPA limit 100 µg/L
worst single sample: 4 µg/L
3/4 SYR4 2015–2019
Gross Alpha, Excl. Radon And U
3.7 pCi/L 25%
of the EPA limit 15 pCi/L
 1/3 SYR4 2013–2019
60 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-DArsenicAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneCombined Radium (-226 And -228)DichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNitrateNitrate-NitriteNitriteOxamylPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
BLACKSMITH, RON
Phone
605-295-8252
Email
[email protected]

Frequently asked questions about Mni Wiconi Wtp / Coreline

Is Mni Wiconi Wtp / Coreline tap water safe to drink?

EPA monitoring detected 11 contaminants in Mni Wiconi Wtp / Coreline'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 Mni Wiconi Wtp / Coreline's water?

EPA monitoring detected TTHM, Total Haloacetic Acids (HAA5), Copper, Lead, Lead, and others. The full list with the level and data source for each is above.

How many people does Mni Wiconi Wtp / Coreline serve?

Mni Wiconi Wtp / Coreline reports serving 25 people in South Dakota, per its EPA record.

Has Mni Wiconi Wtp / Coreline had any water quality violations?

The EPA has 16 violations on file for Mni Wiconi Wtp / Coreline, of which 3 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.