Water Quality Report · Updated October 07, 2026
SIOUX FALLS
SIOUX FALLS delivers tap water graded B (77/100) by TapWaterSafety.org. The utility serves approximately 216,462 residents in SIOUX FALLS, South Dakota using surface water. The most significant water quality concerns are: Arsenic significantly above health guideline; Haloacetic acids (HAA9) significantly above health guideline; Total trihalomethanes (TTHMs) significantly above health guideline. For questions, the utility can be reached at 6053736946.
Is SIOUX FALLS tap water safe to drink?
SIOUX FALLS delivers tap water that earns a grade of B (77/100) from TapWaterSafety.org — a good rating, with only minor concerns relative to health-based guidelines.
The utility serves 216,462 residents in SIOUX FALLS, drawing from surface water.
Public testing data identifies 6 contaminants in this water above EWG's health-based guidelines, including: Arsenic, Haloacetic acids (HAA9), Total trihalomethanes (TTHMs), Haloacetic acids (HAA5), Chromium (hexavalent), Nitrate. For most residents, a properly certified home filter at the kitchen tap is the most cost-effective way to reduce exposure to whatever's in your water. See our filter recommendations below, matched specifically to this utility's contaminant profile.
EPA compliance record
Official U.S. EPA records for SIOUX FALLS (system ID SD4600294) for the last 3 years. Checked 2026-10-07.
Source: U.S. EPA Enforcement and Compliance History Online (ECHO), from the Safe Drinking Water Information System. See EPA's full report.
Quick actions for SIOUX FALLS residents
Top concerns in this water
Based on the most recent EPA and EWG data, these are the most significant water quality issues for SIOUX FALLS.
Arsenic significantly above health guideline
Moderate concernArsenic detected at 2.5 ppb, 625x above the EWG health guideline of 0.004 ppb.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 24.6 ppb, 410x above the EWG health guideline of 0.06 ppb.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 31.8 ppb, 212x above the EWG health guideline of 0.15 ppb.
Contact SIOUX FALLS
Reach the utility directly for service issues, water quality concerns, or to request your Consumer Confidence Report.
General Contact
Treatment Plant
Recommended water filters for SIOUX FALLS
Filters matched to the specific contaminants in this water supply.
Reverse osmosis certified for arsenic (NSF/ANSI 58)
$429-$599Reverse osmosis certified under NSF/ANSI 58 for arsenic is the most reliable home option.
Carbon filter certified for VOCs (NSF/ANSI 53)
$180-$599Activated carbon is effective for disinfection byproducts. Look for NSF/ANSI 53 VOC reduction.
Disclosure: TapWaterSafety earns a commission from purchases made through these links. This does not influence our scoring methodology or filter selection.
Score breakdown
This utility's overall score of 77/100 breaks down across five weighted components. Read the full methodology →
Contaminants detected — international standards comparison
Every contaminant detected, compared side-by-side against US EPA legal limits, the EU Drinking Water Directive (2020/2184), WHO Guidelines, and California's Public Health Goal (the strictest US benchmark). Why we show multiple standards →
| Contaminant | Detected | EWG US health-based |
EPA US legal |
EU DWD Europe |
WHO global |
CA PHG strictest US |
Tested sample year |
Status |
|---|---|---|---|---|---|---|---|---|
| Arsenic Heavy metal |
2.5 ppb | 0.004 | 10.0 | 10 | 10 | 0.004 | — | 625× over |
| Haloacetic acids (HAA9) Disinfection byproduct |
24.6 ppb | 0.06 | — | — | — | — | — | 410× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
31.8 ppb | 0.15 | 80.0 | 100 | — | — | — | 212× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
10.2 ppb | 0.1 | 60.0 | 60 | — | — | — | 102× over |
| Chromium (hexavalent) Heavy metal |
0.19 ppb | 0.02 | — | — | — | — | — | 9.5× over |
| Nitrate Inorganic |
0.48 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 3.4× over |
| Chlorate Disinfection byproduct |
154.0 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Molybdenum Other |
6.58 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Vanadium Other |
1.33 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Barium Heavy metal |
10.0 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Manganese Heavy metal |
0.05 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Strontium Radiological |
0.278 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.62 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
| Lithium Other |
57.7 ppb | — | — | — | — | — | — | Below guideline |
All values in the unit of the detected level. Red cells indicate the detected level exceeds that standard. Some contaminants have limits in some jurisdictions but not others (shown as —). The "Tested" column shows the year each contaminant sample was collected.
Sources: US EPA, EU Drinking Water Directive 2020/2184, WHO Guidelines (4th ed.), California OEHHA PHGs, EWG Tap Water Database.
SIOUX FALLS service area
This water system serves 1 community in Minnehaha County, South Dakota. Click any city for its dedicated tap water quality page.
Find the right filter for SIOUX FALLS water
Browse filter categories by water-quality concern. Each option below is NSF-certified for the matched contaminant type.