Drinking water quality · 2024
· Verified
What's in Sioux Falls, SD tap water
14 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
- 14
- Over federal limit
- 0
- Approaching the limit
- 1
- Service area
- SD
PFAS — EPA UCMR5 (2023–2025)
1 PFAS compound detected in Sioux Falls, SD
The EPA finalized the first-ever federal drinking-water limits for six PFAS compounds in April 2024. These numbers come straight from EPA's UCMR5 lab dataset — every U.S. system serving more than 3,300 people tested every PFAS sample at an entry point to its distribution system. PFAS not listed below were either tested and not detected, or not yet sampled.
Lithium
● Detected (no federal limit)near national p90 (76.59999999999991 mg/L across detecting U.S. systems)
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.
Historical readings · EPA Six-Year Review (2012–2019)
1 contaminant historically over EPA limits in Sioux Falls, SD
Every U.S. public water system reports compliance-monitoring data to EPA. The Six-Year Review releases the 2012–2019 window as a single dataset — here's what your system reported, year by year. Values shown are the highest detection per analyte per year, compared to the federal MCL.
| Contaminant | Worst detection | EPA limit | Years (2012–2019) |
|---|---|---|---|
GROSS BETA worst: 2018 | 4.6 mrem/yr 1.1× | 4 mrem/yr | '18 |
TTHM worst: 2016 | 0.063 mg/L within | 0.08 mg/L | '12'13'14'15'16'17'18'19 |
HAA5 worst: 2016 | 0.026 mg/L within | 0.06 mg/L | '12'13'14'15'16'17'18'19 |
ANTIMONY worst: 2019 | 0.001 mg/L within below national p90 | 0.006 mg/L | '19 |
ARSENIC worst: 2019 | 0.001 mg/L within below national p90 | 0.01 mg/L | '19 |
NITRATE worst: 2018 | 0.81 mg/L within | 10 mg/L | '17'18 |
BARIUM worst: 2019 | 0.008 mg/L within below national p90 | 2 mg/L | '19 |
COPPER worst: 2012 | 0.24 mg/L below national p90 | — | '12'15'18 |
LEAD worst: 2012 | 0.027 mg/L | — | '12'15'18 |
Disinfectants
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ChlorineA disinfectant added to drinking water to kill bacteria and viruses. | 2.3–3.8 mg/LRangeSystem-wide | 4 mg/LMRDLG | Approaching 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 |
Microbial
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Total ColiformA group of bacteria used as an indicator of overall water-system sanitation. | 0.8MaximumMaximum Level Found | 5MCL | Within the limit |
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Chromium, TotalTotal chromium — the sum of all chromium forms, from natural deposits and industrial discharge. | 0.0014 mg/LReported levelSystem-wide | 0.1 mg/LMCLG | Within the 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 |
People also ask about Sioux Falls, SD's water
+Is Sioux Falls, SD tap water safe to drink in 2024?
Every one of the 14 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?
14 contaminants were measured in Sioux Falls, SD's 2024 Consumer Confidence Report, spanning metals, disinfection byproducts, and inorganic chemicals. 12 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. 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.