Tap WaterIndex

← Minnesota

Tap water quality report

Lower Sioux

EPA monitoring tested this supplier for 104 contaminants and detected 13. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

104
contaminants tested
13
detected
4,000
people served
0
health-based violations
Minnesota rankingsLead in MinnesotaPFAS in Minnesota
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.

0
health-based violations
336
violations on file
0
still open
ViolationTypeStatusPeriod
Other Monitoring Resolved 2025-06-26
Other Monitoring Resolved 2025-06-26
Other Monitoring Resolved 2024-07-02
Other Monitoring Resolved 2024-07-02
Other Monitoring Resolved 2024-07-02
Other Monitoring Resolved 2024-07-02
MR Monitoring Resolved 2024-05-01 → 2024-05-31
MR Monitoring Resolved 2024-05-01 → 2024-05-31
MR Monitoring Resolved 2024-05-01 → 2024-05-31
MR Monitoring Resolved 2024-05-01 → 2024-05-31

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
1300 µg/L 100%
of the EPA limit 1300 µg/L
worst single sample: 1800 µg/L
50/50 SYR4 2013–2019
Lead
84.8 µg/L 565%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
worst single sample: 140 µg/L
29/50 SYR4 2013–2019
Lead
0.0014 mg/L 9.3%
of the EPA limit 0.0150 mg/L
 10/10 LCR 2025
Nitrate
1210 µg/L 12%
of the EPA limit 10000 µg/L
 8/12 SYR4 2012–2018
TTHM
2.9 µg/L 3.6%
of the EPA limit 80 µg/L
worst single sample: 3.5 µg/L
6/8 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
1.925 µg/L 3.2%
of the EPA limit 60 µg/L
worst single sample: 2 µg/L
4/5 SYR4 2012–2018
Lithium
77.5 µg/L
No EPA limit set
 2/2 UCMR-5 2024
Barium
29 µg/L 1.5%
of the EPA limit 2000 µg/L
 1/1 SYR4 2018
Combined Radium (-226 And -228)
1.58 pCi/L 32%
of the EPA limit 5 pCi/L
 1/1 SYR4 2013
Fluoride
300 µg/L 7.5%
of the EPA limit 4000 µg/L
 1/1 SYR4 2018
Gross Alpha, Excl. Radon And U
0.6700 pCi/L 4.5%
of the EPA limit 15 pCi/L
 1/1 SYR4 2013
Nitrate-Nitrite
780 µg/L 7.8%
of the EPA limit 10000 µg/L
 1/3 SYR4 2012–2017
Nitrite
20 µg/L 2%
of the EPA limit 1000 µg/L
 1/2 SYR4 2012–2017
91 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,3,7,8-TCDD2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalArsenicAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumCombined UraniumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
DANIELSON, CHAD
Phone
507-644-3159
Email
[email protected]

Frequently asked questions about Lower Sioux

Is Lower Sioux tap water safe to drink?

EPA monitoring detected 13 contaminants in Lower Sioux'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 Lower Sioux's water?

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

How many people does Lower Sioux serve?

Lower Sioux reports serving 4,000 people in Minnesota, per its EPA record.

Has Lower Sioux had any water quality violations?

The EPA has 336 violations on file for Lower Sioux, of which 0 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.