Sioux Falls
SD

Is Sioux Falls, SD Tap Water Safe to Drink?

Sioux Falls tap water meets federal Safe Drinking Water Act standards but 12 of 13 ZIP codes show detections above EPA health guidelines, primarily for lithium. A certified filter is recommended for households that want an additional layer of protection.

5Water systems
13ZIP codes
92.3%ZIPs above EPA guideline
Metro areaSioux Falls, SD-MN
Latest data2025-05-05

Where Does Sioux Falls Get Its Water?

Water in Sioux Falls, SD is provided by 5 public water systems: SIOUX FALLS, KOHALA RANCH WATER CO., LINCOLN COUNTY RURAL WATER SYSTEM, MINNEHAHA COMMUNITY WATER CORP and SOUTH LINCOLN RURAL WATER SYSTEM.

How Is Sioux Falls Tap Water Treated?

Treated water is disinfected using free chlorine and calcium hypochlorite and chloramines. Treatment includes conventional treatment (coagulation, flocculation, and filtration), groundwater disinfection and slow sand filtration.

What's in Sioux Falls Tap Water?

The following contaminants were detected most frequently in Sioux Falls public water systems. 12 of 13 ZIP codes showed detections above EPA health guidelines.

ContaminantPeak detectedEPA guidelineZIPs detectedStatus
lithium 101 µg/L 10 µg/L 12 ZIPs Above guideline
PFTrDA 0.007 µg/L — 0 ZIPs Within guideline
11Cl-PF3OUdS 0.005 µg/L 0.005 µg/L 1 ZIP Within guideline
11Cl-PF3OUdS 0.005 µg/L — 0 ZIPs Within guideline
HFPO-DA 0.005 µg/L — 0 ZIPs Within guideline

Health Risk Profile for Sioux Falls

Based on EPA monitoring data, 12 of 13 ZIP codes in Sioux Falls have recorded detections above EPA health guidelines. Sensitive populations such as infants, pregnant individuals, and those with weakened immune systems may benefit from an additional layer of protection such as a certified point-of-use filter.

Best Filters for PFAS Water Profile

PFAS compounds are detected in this water supply. A reverse osmosis (RO) system or an activated-carbon filter specifically certified under NSF/ANSI P473 is required for reliable PFAS reduction. Standard pitcher and faucet filters without P473 certification do not remove PFAS.

Waterdrop G3P600 Reverse Osmosis System
Under-sink RO system

8-stage tankless RO system certified to NSF/ANSI 58, reduces 1,000+ contaminants including PFAS, lead, arsenic, fluoride, and nitrates.

Epic Pure XP Water Filter Pitcher
Pitcher filter

NSF-certified dual-layer filtration reduces 70+ contaminants including PFAS, lead, chlorine, microplastics, and bacteria.

See recommendations matched to your exact address: choose your ZIP code below.

Frequently Asked Questions about Sioux Falls Tap Water

Is Sioux Falls tap water safe to drink?

Sioux Falls tap water meets Safe Drinking Water Act requirements but 12 of 13 ZIP codes show contaminant levels above EPA health-based guidelines. A certified point-of-use filter adds an extra layer of protection.

What contaminants are in Sioux Falls tap water?

The most commonly detected contaminants in Sioux Falls water systems include: lithium, PFTrDA, 11Cl-PF3OUdS. See the ZIP-level reports for exact measurements and EPA guideline comparisons.

Where does Sioux Falls get its drinking water?

Sioux Falls receives water from 5 public water systems, including SIOUX FALLS.

Do I need a water filter in Sioux Falls?

If your ZIP code is among those with detections above EPA health guidelines, choose a filter certified for the specific contaminants shown in your ZIP report. Reverse osmosis is generally the broadest option for PFAS, lithium, and many other dissolved contaminants.

How often is Sioux Falls tap water tested?

Public water systems in Sioux Falls are required by the EPA to test for regulated contaminants on schedules ranging from daily (for microbials and disinfectants) to annual or triennial (for many chemical contaminants). Results are published in annual Consumer Confidence Reports (CCRs). The data on this page reflects the most recent available EPA monitoring results, with the latest sample date of 2025-05-05.

Tap water reports by ZIP in Sioux Falls

Water utilities serving Sioux Falls, SD

Service area boundaries are approximate and based on state filings or modeled estimates. Contact your utility to confirm exact service at a specific address.

Modeled boundaries are shown with a dashed outline.

Also covers / overlaps with