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States → Missouri

BOONE COUNTY PWSD 9

PWS ID: MO3024058 · COLUMBIA, Missouri 65201-0000

PFAS Detected

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

Population Served
15,035
Total Violations
90
Health-Based Violations
76
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
6,070
County
Boone
School/Daycare
No
MCL Violations
76
Monitoring Violations
6
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Combined Radium (-226 and -228) MCL 38 2005
Gross Alpha, Excl. Radon and U MCL 38 2005
Revised Total Coliform Rule RPT 6 2025
E. COLI MR 4 2021
Gross Alpha, Excl. Radon and U MR 2 1994

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 10 of 300 samples detected PFAS.

Contaminant Date Result MRL Status
PFTA 5/16/2024 <0.008 µg/L 0.008 µg/L Not Detected
4:2 FTS 5/16/2024 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 5/16/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 5/16/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFHpS 5/16/2024 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 5/16/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFPeS 5/16/2024 <0.004 µg/L 0.004 µg/L Not Detected
NFDHA 5/16/2024 <0.02 µg/L 0.02 µg/L Not Detected
PFBS 5/16/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFTrDA 5/16/2024 <0.007 µg/L 0.007 µg/L Not Detected
PFDA 5/16/2024 <0.003 µg/L 0.003 µg/L Not Detected
lithium 5/16/2024 25.7000 µg/L 9 µg/L Detected
PFEESA 5/16/2024 <0.003 µg/L 0.003 µg/L Not Detected
NEtFOSAA 5/16/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFHxA 5/16/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 5/16/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 5/16/2024 <0.004 µg/L 0.004 µg/L Not Detected
HFPO-DA 5/16/2024 <0.005 µg/L 0.005 µg/L Not Detected
ADONA 5/16/2024 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 5/16/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFOS 5/16/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFUnA 5/16/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFHpA 5/16/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 5/16/2024 <0.003 µg/L 0.003 µg/L Not Detected
NMeFOSAA 5/16/2024 <0.006 µg/L 0.006 µg/L Not Detected
PFOA 5/16/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFMBA 5/16/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 5/16/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFHxS 5/16/2024 <0.003 µg/L 0.003 µg/L Not Detected
11Cl-PF3OUdS 5/16/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFTA 5/16/2024 <0.008 µg/L 0.008 µg/L Not Detected
PFTrDA 5/16/2024 <0.007 µg/L 0.007 µg/L Not Detected
NEtFOSAA 5/16/2024 <0.005 µg/L 0.005 µg/L Not Detected
NMeFOSAA 5/16/2024 <0.006 µg/L 0.006 µg/L Not Detected
PFHxA 5/16/2024 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 5/16/2024 <0.02 µg/L 0.02 µg/L Not Detected
PFEESA 5/16/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 5/16/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 5/16/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 5/16/2024 <0.004 µg/L 0.004 µg/L Not Detected
8:2 FTS 5/16/2024 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 5/16/2024 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 5/16/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 5/16/2024 <0.005 µg/L 0.005 µg/L Not Detected
HFPO-DA 5/16/2024 <0.005 µg/L 0.005 µg/L Not Detected
9Cl-PF3ONS 5/16/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFPeS 5/16/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFUnA 5/16/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFDoA 5/16/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDA 5/16/2024 <0.003 µg/L 0.003 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.