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Tap water quality report

Saint Onge Sewer & Water Co

EPA monitoring tested this supplier for 21 contaminants and detected 10. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

21
contaminants tested
10
detected
255
people served
24
health-based violations
South Dakota rankingsLead in South DakotaPFAS in South Dakota
Water source
Ground water
Ownership
Local government
Counties served
Lawrence

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.

24
health-based violations
183
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2006-07-01 → 2006-07-31
MCL Health-based Resolved 2006-07-01 → 2006-07-31
MCL Health-based Resolved 2006-07-01 → 2006-07-31
MCL Health-based Resolved 2006-06-01 → 2006-06-30
MCL Health-based Resolved 2006-06-01 → 2006-06-30
MCL Health-based Resolved 2006-06-01 → 2006-06-30
MCL Health-based Resolved 2004-09-01 → 2004-09-30
MCL Health-based Resolved 2004-09-01 → 2004-09-30
MCL Health-based Resolved 2004-09-01 → 2004-09-30
MCL Health-based Resolved 2001-11-01 → 2001-11-30

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 single worst sample on record — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Copper
483 µg/L 37%
of the EPA limit 1300 µg/L
 15/15 SYR4 2012–2018
Lead
0.0020 mg/L 13%
of the EPA limit 0.0150 mg/L
 15/15 LCR 2024
Lead
6 µg/L 40%
of the EPA limit 15 µg/L
 15/15 SYR4 2012–2018
Nitrate
1980 µg/L 20%
of the EPA limit 10000 µg/L
 6/6 SYR4 2017–2019
TTHM
6.31 µg/L 7.9%
of the EPA limit 80 µg/L
 2/4 SYR4 2012–2018
Arsenic
5 µg/L 50%
of the EPA limit 10 µg/L
 1/1 SYR4 2012
Fluoride
500 µg/L 13%
of the EPA limit 4000 µg/L
 1/1 SYR4 2012
Gross Alpha, Excl. Radon And U
5.48 pCi/L 37%
of the EPA limit 15 pCi/L
 1/1 SYR4 2015
Selenium
6 µg/L 12%
of the EPA limit 50 µg/L
 1/1 SYR4 2012
Total Haloacetic Acids (HAA5)
1.5 µg/L 2.5%
of the EPA limit 60 µg/L
 1/4 SYR4 2012–2018
11 contaminants tested, none detected
Antimony, TotalBariumBeryllium, TotalCadmiumChromiumCombined Radium (-226 And -228)Combined UraniumGross Beta Particle ActivityMercuryNitriteThallium, Total

Utility contact

Contact
MIKE KYTE
Phone
6056457369
Email
mwkyte@spe.midco.net

Frequently asked questions about Saint Onge Sewer & Water Co

Is Saint Onge Sewer & Water Co tap water safe to drink?

EPA monitoring detected 10 contaminants in Saint Onge Sewer & Water Co'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 Saint Onge Sewer & Water Co'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 Saint Onge Sewer & Water Co serve?

Saint Onge Sewer & Water Co reports serving 255 people in South Dakota, per its EPA record.

Has Saint Onge Sewer & Water Co had any water quality violations?

The EPA has 183 violations on file for Saint Onge Sewer & Water Co, of which 24 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.