PlainWater
States → South Dakota

EAGLE BUTTE

PWS ID: SD4600010 · EAGLE BUTTE, South Dakota 57625

PFAS Detected

1 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.

Population Served
4,000
Total Violations
64
Health-Based Violations
6
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
900
County
Dewey
School/Daycare
No
MCL Violations
0
Monitoring Violations
34
Treatment Tech Violations
6

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Public Notice Other 8 2006
Chlorine MR 7 2024
Stage 2 Disinfectants and Disinfection Byproducts Rule MR 6 2010
TTHM MR 5 2024
Total Haloacetic Acids (HAA5) MR 5 2024
Lead and Copper Rule MR 5 1996
Stage 1 Disinfectants and Disinfection Byproducts Rule TT 4 2017
Coliform (TCR) MR 4 1995
Asbestos MR 2 1993
Revised Total Coliform Rule TT 2 2024
Consumer Confidence Rule Other 2 2004

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 4 of 120 samples detected PFAS.

Contaminant Date Result MRL Status
HFPO-DA 8/11/2025 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 8/11/2025 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 8/11/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFMPA 8/11/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFPeA 8/11/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 8/11/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFTA 8/11/2025 <0.008 µg/L 0.008 µg/L Not Detected
PFTrDA 8/11/2025 <0.007 µg/L 0.007 µg/L Not Detected
NEtFOSAA 8/11/2025 <0.005 µg/L 0.005 µg/L Not Detected
NMeFOSAA 8/11/2025 <0.006 µg/L 0.006 µg/L Not Detected
6:2 FTS 8/11/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFEESA 8/11/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFDA 8/11/2025 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 8/11/2025 <0.02 µg/L 0.02 µg/L Not Detected
PFBA 8/11/2025 <0.005 µg/L 0.005 µg/L Not Detected
ADONA 8/11/2025 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 8/11/2025 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 8/11/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFUnA 8/11/2025 <0.002 µg/L 0.002 µg/L Not Detected
PFDoA 8/11/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 8/11/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 8/11/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFHxS 8/11/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 8/11/2025 <0.003 µg/L 0.003 µg/L Not Detected
lithium 8/11/2025 48.3000 µg/L 9 µg/L Detected
PFPeS 8/11/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFHpS 8/11/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 8/11/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFHxA 8/11/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 8/11/2025 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 5/6/2025 <0.002 µg/L 0.002 µg/L Not Detected
8:2 FTS 5/6/2025 <0.005 µg/L 0.005 µg/L Not Detected
ADONA 5/6/2025 <0.003 µg/L 0.003 µg/L Not Detected
HFPO-DA 5/6/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 5/6/2025 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 5/6/2025 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 5/6/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 5/6/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFPeA 5/6/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 5/6/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 5/6/2025 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 5/6/2025 <0.02 µg/L 0.02 µg/L Not Detected
PFPeS 5/6/2025 <0.004 µg/L 0.004 µg/L Not Detected
lithium 5/6/2025 48.5000 µg/L 9 µg/L Detected
PFDoA 5/6/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHpS 5/6/2025 <0.003 µg/L 0.003 µg/L Not Detected
NMeFOSAA 5/6/2025 <0.006 µg/L 0.006 µg/L Not Detected
PFUnA 5/6/2025 <0.002 µg/L 0.002 µg/L Not Detected
PFTA 5/6/2025 <0.008 µg/L 0.008 µg/L Not Detected
11Cl-PF3OUdS 5/6/2025 <0.005 µg/L 0.005 µg/L Not Detected
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. PFAS data from EPA UCMR5 monitoring program (2023-2025). This data is provided for informational purposes only.