MyCleanWater

Sioux Falls, South Dakota Water Quality Report

Water quality data for 8 water systems serving 223,381 people.

45
Poor
out of 100

Water Source

8
Water Systems
223K
People Served
Surface water, Ground water
Water Source

Detected Contaminants

ContaminantDetected LevelEPA Limit (MCL)Health Guideline% of LimitStatus
lithium70.9 No federal limit10.0 ug/L(EPA/USGS HBSL)
709%
Above guideline
PFBA0.006 No federal limit1000.0 ug/L(EWG)
0%
Below guideline

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Compliance & Violations

Active Violations (46)

12

Jul 7, 2025

critical

71

Jul 1, 2025

minor

45

Mar 27, 2023

critical

45

Dec 24, 2021

critical

12

Aug 15, 2021

critical

45

Oct 5, 2017

critical

Violation

Unknown

minor

Violation

Unknown

minor

Violation

Unknown

minor

Violation

Unknown

minor

Violation

Unknown

minor

Violation

Unknown

minor

Violation

Unknown

minor

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Unknown

minor

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Unknown

minor

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Unknown

minor

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Unknown

minor

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Unknown

minor

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Unknown

minor

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Unknown

minor

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Unknown

minor

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Unknown

minor

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Unknown

minor

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Unknown

minor

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Unknown

minor

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Unknown

minor

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Unknown

minor

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Unknown

minor

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Unknown

minor

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Unknown

minor

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Unknown

minor

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Unknown

minor

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Unknown

minor

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Unknown

minor

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Unknown

minor

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Unknown

minor

Violation

Unknown

minor

Violation

Unknown

minor

Violation

Unknown

minor

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Unknown

minor

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Unknown

minor

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Unknown

minor

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Unknown

minor

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Unknown

minor

Violation

Unknown

minor

Violation

Unknown

minor

Resolved Violations (253)

4B

Oct 11, 2024

minor

72

Jul 1, 2024

minor

72

Jul 1, 2024

minor

72

Jul 1, 2024

minor

27

Apr 1, 2024 — Jun 30, 2024

moderate

+ 248 more resolved violations

Frequently Asked Questions

Is Sioux Falls tap water safe to drink?

Sioux Falls's water meets all EPA maximum contaminant levels. However, 2 contaminants were detected at various levels. Some residents may prefer additional filtration for peace of mind.

What contaminants are in Sioux Falls tap water?

2 contaminants have been detected in Sioux Falls's water supply across 8 water systems. See the full contaminant table above for details.

How can I improve my water quality in Sioux Falls?

Install a water filter rated for the specific contaminants found in Sioux Falls's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.

Does Sioux Falls have any water quality violations?

Yes, Sioux Falls currently has 46 active violations. See the violations section above for details.