Drinking water quality · 2024
What's in Sioux Falls, SD tap water
15 contaminants were measured in the Sioux Falls, SD water system's 2024 annual report. Each is shown below against its federal limit.
- Reporting year
- 2024
- Contaminants measured
- 15
- Over federal limit
- 0
- Approaching the limit
- 1
- Service area
- SD
Where your water comes from · EPA SDWIS
Sioux Falls, SD's drinking water comes from ground water, drawn from 65 sources.
Source
- #10
- #101
- #102
- #103
- + 61 more
Treatment
- TREATMENT PLANT
Distribution
Also buys water from LEWIS AND CLARK REGIONAL WATER SYSTE.
Compliance history
Federal Safe Drinking Water Act violation & enforcement records (EPA SDWIS). A violation is a regulatory determination by the state or EPA — separate from the measured levels above.
- Treatment technique violationHealth-based1 violation on record · most recent Dec 2009resolved
Source: EPA SDWIS / ECHO. View the full federal record on EPA ECHO ↗
Other
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Chlorine Total | 2.3–3.8 mg/LRangeSystem-wide | 4 mg/LMRDLG | Approaching the limit |
| Chromium | 0.0014 mg/LReported levelSystem-wide | 0.1 mg/LMCLG | Within the limit |
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ArsenicA naturally occurring element that also enters water from industry and agriculture. | 0.005 mg/LReported levelSystem-wide | 0 mg/LMCLG | Within the limit |
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | 0.003 mg/L90th percentileAt the tap | 0.015 mg/LAction level | Within the limit |
| CopperA metal that enters water from corroding household plumbing. | 0.1 mg/L90th percentileAt the tap | 1.3 mg/LMCLG | Within the limit |
| BariumA metal from erosion of natural deposits and industrial discharge. | 0.0144 mg/LReported levelSystem-wide | 2 mg/LMCLG | Within the limit |
| LithiumA naturally occurring element found in some groundwater. | 70.9 ug/LReported levelSystem-wide | None set | Detected — no federal limit |
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter. | 19–39 ug/LRangeSystem-wide | None set | Within the limit |
| HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. | 7.3–20 ug/LRangeSystem-wide | None set | Within the limit |
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.34–0.84 mg/LRangeSystem-wide | 4 mg/LMCLG | Within the limit |
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | 0.01–1.6 mg/LRangeSystem-wide | 10 mg/LMCLG | Within the limit |
Microbial
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Total ColiformA group of bacteria used as an indicator of overall water-system sanitation. | 0.8 %Highest single sampleMaximum Level Found | None set | Detected — no federal limit |
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TOCTotal organic carbon — a measure of organic material dissolved in the water. | 1.72–3.21RangeSystem-wide | None set | Detected — no federal limit |
| TurbidityA measure of cloudiness from suspended particles in the water. | 0.11 %Highest single sampleMaximum Level Found | None set | Detected — no federal limit |
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Gross Beta Particle ActivityGross beta particle activity — a combined measure of beta-emitting radioactive substances. | 4.7 pCi/LReported levelSystem-wide | 0 pCi/LMCLG | Detected — no federal limit |
People also ask about Sioux Falls, SD's water
+Is Sioux Falls, SD tap water safe to drink in 2024?
Every one of the 15 contaminants measured in Sioux Falls, SD's 2024 Consumer Confidence Report is below its federal limit. "Safe" under the EPA's drinking-water standards is health-based, not aesthetic — but by those standards, no measured contaminant in this report exceeds its enforceable threshold. Individual health concerns (e.g. immunocompromised, infant, pregnancy) may warrant additional filtering regardless of compliance.
+What contaminants are in Sioux Falls, SD tap water?
15 contaminants were measured in Sioux Falls, SD's 2024 Consumer Confidence Report, spanning metals, disinfection byproducts, and inorganic chemicals. 9 have an enforceable federal limit; the rest are detected but unregulated. Every measured value, in the utility's own units, is on this page.
+Are any contaminants in Sioux Falls, SD tap water approaching the federal limit?
One contaminant is between 80% and 100% of the federal limit in this report: Chlorine Total. Approaching means measured but not in violation — a margin that can close quickly if conditions change.
+Where does the data on this page come from?
Every value is transcribed from Sioux Falls, SD's 2024 Consumer Confidence Report — the annual drinking-water report every U.S. public water utility is required by federal law to publish. The original source document is archived and viewable on this site. A water-quality report covers an entire service area, not a single address.
+How often is Sioux Falls, SD's water quality data updated?
Each U.S. public water utility publishes one Consumer Confidence Report per year, covering the prior calendar year's measurements. This page reflects the 2024 report; a new report will replace it once the utility publishes its next annual update.