Minnehaha County Water Quality: 2 Cities Ranked by the Records
Minnehaha County, South Dakota: 2 city reports built from EPA and utility records. A county has many suppliers; each city shows the system that serves it.
Highest result for each contaminant
One row per contaminant: the highest result any system in the county reported, against its limit. Open a row for the systems behind it.
LithiumDetected in 2 systems10 µg/L EPA health reference level (screening, not a legal limit) · US EPAHighest70.9 µg/L
- SIOUX FALLS70.9 µg/LSample date: 2023-08-14 to 2024-05-14
- BRANDON44.8 µg/LSample date: 2025-02-11 to 2025-08-11
Water hardnessDetected in 1 systemAesthetic, no federal health limit · USGSHighest12.2 gpg
- SIOUX FALLS12.2 gpgReporting year: 2025
Lead (90th percentile)Detected in 2 systems15 µg/L federal action level · US EPAHighest3 µg/L
- SIOUX FALLS3 µg/LMonitoring period: 2024–2024
- BRANDON1 µg/LMonitoring period: 2023–2023
29 PFAS tested, none detected in any systemShow
Tested in these 2 systems: BRANDON, SIOUX FALLS
- 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)
- 1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS)
- 1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS)
- 1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS)
- 4,8-Dioxa-3H-perfluorononanoic acid (ADONA)
- 9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS)
- Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals)
- N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)
- N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)
- Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)
- Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA)
- Perfluoro-3-methoxypropanoic acid (PFMPA)
- Perfluoro-4-methoxybutanoic acid (PFMBA)
- Perfluorobutanesulfonic acid (PFBS)
- Perfluorobutanoic acid (PFBA)
- Perfluorodecanoic acid (PFDA)
- Perfluorododecanoic acid (PFDoA)
- Perfluoroheptanesulfonic acid (PFHpS)
- Perfluoroheptanoic acid (PFHpA)
- Perfluorohexanesulfonic acid (PFHxS)
- Perfluorohexanoic acid (PFHxA)
- Perfluorononanoic acid (PFNA)
- Perfluorooctanesulfonic acid (PFOS)
- Perfluorooctanoic acid (PFOA)
- Perfluoropentanesulfonic acid (PFPeS)
- Perfluoropentanoic acid (PFPeA)
- Perfluorotetradecanoic acid (PFTA)
- Perfluorotridecanoic acid (PFTrDA)
- Perfluoroundecanoic acid (PFUnA)
Cities ranked by the records
Ranked by the Purity Score of each city's main water system, highest first. Scores belong to water systems; there is no county score. The score is computed only from contaminants measured in the published EPA record, so this ranks the record, not which city's water is safest. How the score works.
0of 2 cities above the 15 µg/L action level
Based on each system's 90th-percentile result. Lead from household plumbing isn't in this record.
Lead in South Dakota1city reports hardness · Sioux Falls, 12.2 gpg
Hard on the USGS scale. An aesthetic measure with no federal health limit.
Hard water explainedLargest water systems
- Sioux FallsSIOUX FALLS · SD4600294216,462 served
- BrandonBRANDON · SD460004811,048 served
Frequently asked
How does Minnehaha County tap water compare across cities?
PurityMap ranks 2 cities in Minnehaha County by the Purity Score of each city's main water system, computed only from contaminants measured in the published EPA record. Scores belong to water systems, not to cities. The highest published score is Brandon's main water system: BRANDON · PWSID SD4600048 · Purity Score 99 (Excellent) · Confidence: moderate · Assessed at the water-system level. The ranking compares the records, not which city's water is safest, and your own tap can differ with household plumbing.
How many Minnehaha County cities had a PFAS sample above a 2024 EPA limit?
None of the 2 Minnehaha County city reports had a PFAS sample above a 2024 EPA limit in EPA's UCMR 5 testing. PFAS were detected below the limit in 0.
Is there lead in Minnehaha County tap water?
Utilities report lead as a 90th-percentile result from home taps. 2 of 2 Minnehaha County cities reported a value above zero, and none was above the 15 µg/L federal action level. Lead usually comes from a building's own pipes and fixtures, so only a test at your tap tells you what you drink.
Does Minnehaha County have hard water?
Hardness is published in utility water-quality reports for 1 Minnehaha County city on record; the hardest is Sioux Falls at 12.2 grains per gallon. Hardness affects scale and appliances; it is not a health finding.
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