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States → Iowa

HUMBOLDT MUNICIPAL WATER DEPT

PWS ID: IA4641064 · HUMBOLDT, Iowa 50548

PFAS Detected

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

Population Served
4,792
Total Violations
10
Health-Based Violations
5
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
2,058
County
Humboldt
School/Daycare
No
MCL Violations
5
Monitoring Violations
1
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 5 2009
Long Term 2 Enhanced Surface Water Treatment Rule MR 1 2020

PFAS Testing Results (UCMR5)

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

Contaminant Date Result MRL Status
8:2 FTS 7/15/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFOS 7/15/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFTA 7/15/2025 <0.008 µg/L 0.008 µg/L Not Detected
lithium 7/15/2025 9.1000 µg/L 9 µg/L Detected
PFHpS 7/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
ADONA 7/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 7/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 7/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 7/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 7/15/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFOA 7/15/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFDA 7/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 7/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 7/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 7/15/2025 <0.002 µg/L 0.002 µg/L Not Detected
PFPeA 7/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 7/15/2025 <0.002 µg/L 0.002 µg/L Not Detected
PFPeS 7/15/2025 <0.004 µg/L 0.004 µg/L Not Detected
HFPO-DA 7/15/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 7/15/2025 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 7/15/2025 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 7/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
NEtFOSAA 7/15/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFMPA 7/15/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFTrDA 7/15/2025 <0.007 µg/L 0.007 µg/L Not Detected
PFMBA 7/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 7/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 7/15/2025 <0.02 µg/L 0.02 µg/L Not Detected
11Cl-PF3OUdS 7/15/2025 <0.005 µg/L 0.005 µg/L Not Detected
NMeFOSAA 7/15/2025 <0.006 µg/L 0.006 µg/L Not Detected
NMeFOSAA 5/19/2025 <0.006 µg/L 0.006 µg/L Not Detected
PFTA 5/19/2025 <0.008 µg/L 0.008 µg/L Not Detected
NEtFOSAA 5/19/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFTrDA 5/19/2025 <0.007 µg/L 0.007 µg/L Not Detected
PFDoA 4/7/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFBA 4/7/2025 <0.005 µg/L 0.005 µg/L Not Detected
HFPO-DA 4/7/2025 <0.005 µg/L 0.005 µg/L Not Detected
ADONA 4/7/2025 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 4/7/2025 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 4/7/2025 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 4/7/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFHxA 4/7/2025 <0.003 µg/L 0.003 µg/L Not Detected
4:2 FTS 4/7/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFDA 4/7/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 4/7/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 4/7/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFNA 4/7/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFHxS 4/7/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 4/7/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 4/7/2025 <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.