Tap WaterIndex

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Tap water quality report

Sioux Falls

EPA monitoring tested this supplier for 51 contaminants and detected 11. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

51
contaminants tested
11
detected
216,462
people served
2
health-based violations
South Dakota rankingsLead in South DakotaPFAS in South Dakota
Water source
Surface water
Ownership
Local government
Counties served
Minnehaha

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.

2
health-based violations
5
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2009-12-08
TT Health-based Resolved 2009-12-08
MR Monitoring Archived 1993-08-01 → 1993-08-31
MR Monitoring Archived 1976-07-01 → 1980-06-30
MR Monitoring Archived 1976-07-01 → 1980-06-30

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
48.2725 µg/L 60%
of the EPA limit 80 µg/L
worst single sample: 63 µg/L
156/156 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
16 µg/L 27%
of the EPA limit 60 µg/L
worst single sample: 26 µg/L
156/156 SYR4 2012–2019
Copper
113.1 µg/L 8.7%
of the EPA limit 1300 µg/L
worst single sample: 570 µg/L
150/150 SYR4 2012–2018
Lead
6 µg/L 40%
of the EPA limit 15 µg/L
worst single sample: 27 µg/L
146/150 SYR4 2012–2018
Lead
0.0030 mg/L 20%
of the EPA limit 0.0150 mg/L
 15/15 LCR 2024
Lithium
70.9 µg/L
No EPA limit set
 8/8 UCMR-5 2024
Nitrate
810 µg/L 8.1%
of the EPA limit 10000 µg/L
 4/4 SYR4 2017–2018
Antimony, Total
1 µg/L 17%
of the EPA limit 6 µg/L
 1/1 SYR4 2019
Arsenic
1 µg/L 10%
of the EPA limit 10 µg/L
 1/1 SYR4 2019
Barium
8 µg/L 0.4%
of the EPA limit 2000 µg/L
 1/1 SYR4 2019
Gross Beta Particle Activity
4.6 pCi/L
No EPA limit set
 1/1 SYR4 2018
40 contaminants tested, none detected
11Cl-PF3OUdS4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAsbestosBeryllium, TotalCadmiumChromiumCombined Radium (-226 And -228)Combined UraniumGross Alpha, Excl. Radon And UHfpo-DaMercuryNetfosaaNfdhaNmefosaaNitritePfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaSeleniumThallium, Total

Utility contact

Contact
TED LEWIS
Phone
6053736946
Email
[email protected]

Frequently asked questions about Sioux Falls

Is Sioux Falls tap water safe to drink?

EPA monitoring detected 11 contaminants in Sioux Falls'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 Sioux Falls'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 Sioux Falls serve?

Sioux Falls reports serving 216,462 people in South Dakota, per its EPA record.

Has Sioux Falls had any water quality violations?

The EPA has 5 violations on file for Sioux Falls, of which 2 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.