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Sioux Falls Drinking Water Quality

What's Really in Your Tap Water?

Good news for Sioux Falls residents — your tap water meets all federal safety standards. At 468 ppm (27.4 gpg), the water is quite hard — you may notice mineral buildup on fixtures. Lead levels test well below the EPA action level. There have been 3 violations recorded over the past 3 years.

A

Safe to Drink

Meets all EPA standards

27.4 GPG hardness

Lead

Below EPA action level

2.94ppb
EPA Limit

EPA action level: 15 ppb

Hardness

Very Hard water

468ppm
0100562+

US Average: 100 ppm

Violations

Past 3 years

3total

All administrative/monitoring

View EPA report →

Is Sioux Falls Tap Water Safe to Drink?

Sioux Falls tap water meets all EPA health standards and is safe to drink.

  • •No health-based violations in the past 3 years.
  • •Lead levels are below the EPA action level.
  • •3 monitoring/reporting violations (administrative, not health-related).
  • •For complete peace of mind, consider testing your home's water—contaminants can enter through your plumbing.

The data below shows test results from 10 water utilities serving 228K people in the Sioux Falls area. Water quality testing is conducted regularly and reported to the EPA.

How Hard is Sioux Falls Water?

SoftVery Hard
060120180300+

468 ppm

27.4 grains per gallon

Very Hard

Very hard water causes significant mineral buildup. A water softener is recommended.

Estimated from 1 neighboring county. Actual values may vary.

Impact on Your Home

Shower

Dries out skin & hair

Kitchen

Heavy mineral deposits

Laundry

Stiff, dingy clothes

Appliances

Significant scale

Regional Comparison

Sioux Falls
468
South Dakota
280
US Average
100

Values in ppm (mg/L as CaCO₃)

Based on 1 water samples from Lincoln County.

Your pipes tell a different story

The data above shows what leaves the treatment plant—not what comes out of your faucet. Old pipes, lead solder, and building plumbing can add contaminants the city never tests for. Know exactly what's in your Sioux Falls tap water.

Test Your WaterSee top-rated kits →

Home test kits detect lead, bacteria, pesticides, and 100+ other contaminants. Results in 5-10 business days from certified labs.

Water splashing from a kitchen faucet

Lead & Contaminants

Understanding lead levels and water quality violations in Sioux Falls

Lead Test Results

90th Percentile Lead Level

2.94 ppb

Below EPA Action Level
0EPA Limit (15)30+

Sioux Falls lead levels are well within safe limits.

Regular testing is still recommended, as lead can enter water through household plumbing.

Last sampled: 2024-12-31

About Lead in Drinking Water

What is Lead in Water?

Lead is a toxic metal that can dissolve into drinking water from older pipes, solder, and fixtures. It's invisible, tasteless, and odorless, making testing the only way to detect it. The EPA has set an action level of 15 ppb, though they emphasize there is no safe level of lead exposure.

Potential Health Effects

Children

Developmental delays, learning difficulties, lower IQ, behavioral issues

Adults

High blood pressure, kidney damage, reproductive issues

How to Reduce Exposure

  • •Run water for 30 seconds to 2 minutes before drinking, especially in the morning
  • •Use cold water for cooking and drinking (hot water dissolves more lead)
  • •Install a NSF-certified filter designed to remove lead
  • •Test your water, especially if your home was built before 1986

EPA Compliance History

Active Violations

Administrative issues pending

Current violations are administrative or monitoring-related. Water quality is not immediately affected, but stay informed about utility updates.

3-Year Violation Summary

3

Total Violations

0

Health-Related

3

Administrative

Active violations pending resolution

Health-Related Violations

Contaminant exceeded EPA safety limits. May require filter or alternative water source.

Administrative Violations

Missed testing deadlines or reporting. Does not indicate water quality issues.

View Full EPA Compliance Report for Sioux Falls

Who Provides Sioux Falls's Water?

Utility Name

SIOUX FALLS

EPA System ID (PWSID)

SD4600294

Primary Water Source

Groundwater

Population Served

228K

View Full EPA Report

Frequently Asked Questions

Common questions about Sioux Falls tap water quality

Yes, Sioux Falls tap water is safe to drink. The water meets all EPA standards with no health-based violations in the past 3 years. Lead levels are below the EPA action level of 15 ppb.
Sioux Falls has very hard water with a hardness of 468 ppm (27.4 grains per gallon). Very hard water causes significant mineral buildup. A water softener is recommended.
Lead levels (2.94 ppb) are below the EPA action level of 15 ppb.
Sioux Falls's tap water is provided by SIOUX FALLS. The EPA system ID (PWSID) is SD4600294. The primary water source is Groundwater. You can find official water quality reports and contact information through your local utility.
Sioux Falls tap water meets all EPA standards and is safe to drink without filtration. The water is very hard (468 ppm), so a water softener could reduce scale buildup in pipes and appliances.
Sioux Falls's water utility has had 3 violations in the past 3 years. Of these, 0 were health-based and 3 were monitoring/reporting related.
Sioux Falls's water utility uses chlorine or chloramine to disinfect the water supply. This is a safe and common practice required by the EPA. The taste is usually more noticeable in warm weather or near treatment facilities. To reduce chlorine taste, let water sit in an open pitcher for 30 minutes, use a refrigerator filter, or install a carbon filter on your tap.
Sioux Falls's tap water primarily comes from groundwater sources. The water undergoes treatment at local facilities before being distributed through the municipal water system. The water is provided by SIOUX FALLS.

Nearby Cities in South Dakota

Rapid City

Very Hard water

Aberdeen

Very Hard water

Watertown

Pierre

Very Hard water

Brookings

Very Hard water

Mitchell

View all South Dakota cities

This data is for informational purposes only. Water quality can vary by neighborhood and building. For official reports, contact your local water utility or the EPA. Learn about our methodology