Drinking water quality · 2024
· Verified
· PWSID SD4600294
What's in Sioux Falls, SD tap water
Every one of the 10 core regulated contaminants reported for Sioux Falls, SD came in below its federal limit.
- !1 contaminant within 20% of a limit
- !10 of 27 core regulated contaminants reported — 17 never appear in this report
- ✓Nothing over a federal limit
- ✓No open federal violations
+How this score is calculated
Every system starts at 100. Points come off for measured levels, for the federal violation record, and for how much of the core regulated set the utility actually reported. All three inputs are the utility's own published numbers and EPA's own records.
- −0 contaminants at or above a federal limit
- −4 contaminants within 20% of a limit
- −0 open health-based violations
- −0 open monitoring / reporting violations
- −0 health-based violations resolved in the last 5 years
- −14 core regulated contaminants never reported (10/27)
A 90–100 · B 80–89 · C 70–79 · D 60–69 · F below 60. A system reporting under a third of the core set is capped at C however clean its numbers look — a short report is not a clean bill of health.
Full grading methodology, constant for constant →What to worry about
- Chlorine Total95% of the federal limit2.3–3.8 mg/L · limit 4 mg/L
higher than 90% of U.S. systems
+14 contaminants were measured and came in below the limitShow all
| Contaminant | Measured | Federal limit |
|---|---|---|
| Arsenic | 0.005 mg/L | 0.01 mg/L |
| TTHM | 19–39 ug/L | 80 ug/L |
| HAA5 | 7.3–20 ug/L | 60 ug/L |
| Fluoride | 0.34–0.84 mg/L | 4 mg/L |
| Lead | 0.003 mg/L | 0.015 mg/L |
| Nitrate | 0.01–1.6 mg/L | 10 mg/L |
| Copper | 0.1 mg/L | 1.3 mg/L |
| Chromium | 0.0014 mg/L | 0.1 mg/L |
| Barium | 0.0144 mg/L | 2 mg/L |
| Lithium | 70.9 ug/L | — |
| Total Coliform | 0.8 % | — |
| TOC | 1.72–3.21 | — |
| Turbidity | 0.11 % | — |
| Gross Beta Particle Activity | 4.7 pCi/L | 0 pCi/L |
What this report doesn't tell you
17 of the 27 contaminants a community water system normally reports do not appear anywhere in Sioux Falls, SD's data. Absent is not the same as absent-from-the-water — it means nobody published a number.
+Full detail: PFAS testing, water source, historical monitoring, and the federal violation record
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 ↗