PlainWater
States → Idaho

RATHDRUM CITY OF

PWS ID: ID1280152 · RATHDRUM, Idaho 83858

PFAS Detected

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

Population Served
10,358
Total Violations
26
Health-Based Violations
4
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
4,143
County
Kootenai
School/Daycare
No
MCL Violations
4
Monitoring Violations
21
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 10 2001
Lead and Copper Rule MR 5 2023
Coliform (TCR) MCL 4 2009
Nitrate MR 2 2000
Gross Alpha, Excl. Radon and U MR 1 1979
Total Haloacetic Acids (HAA5) MR 1 2025
TTHM MR 1 2025
Chlorine MR 1 2010

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 4 of 300 samples detected PFAS.

Contaminant Date Result MRL Status
9Cl-PF3ONS 8/7/2024 <0.002 µg/L 0.002 µg/L Not Detected
ADONA 8/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFTrDA 8/7/2024 <0.007 µg/L 0.007 µg/L Not Detected
11Cl-PF3OUdS 8/7/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFHpA 8/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 8/7/2024 <0.004 µg/L 0.004 µg/L Not Detected
NFDHA 8/7/2024 <0.02 µg/L 0.02 µg/L Not Detected
PFEESA 8/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 8/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 8/7/2024 0.0080 µg/L 0.003 µg/L Detected
PFMPA 8/7/2024 <0.004 µg/L 0.004 µg/L Not Detected
8:2 FTS 8/7/2024 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 8/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 8/7/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 8/7/2024 <0.005 µg/L 0.005 µg/L Not Detected
NEtFOSAA 8/7/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFBS 8/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 8/7/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFHxS 8/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 8/7/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 8/7/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFOA 8/7/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFDA 8/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 8/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFTA 8/7/2024 <0.008 µg/L 0.008 µg/L Not Detected
PFHpS 8/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
HFPO-DA 8/7/2024 <0.005 µg/L 0.005 µg/L Not Detected
NMeFOSAA 8/7/2024 <0.006 µg/L 0.006 µg/L Not Detected
PFHxA 8/7/2024 0.0042 µg/L 0.003 µg/L Detected
lithium 8/7/2024 <9 µg/L 9 µg/L Not Detected
9Cl-PF3ONS 8/7/2024 <0.002 µg/L 0.002 µg/L Not Detected
ADONA 8/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
HFPO-DA 8/7/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 8/7/2024 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 8/7/2024 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 8/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
lithium 8/7/2024 <9 µg/L 9 µg/L Not Detected
PFMPA 8/7/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFHpS 8/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
11Cl-PF3OUdS 8/7/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFPeS 8/7/2024 <0.004 µg/L 0.004 µg/L Not Detected
NFDHA 8/7/2024 <0.02 µg/L 0.02 µg/L Not Detected
PFEESA 8/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 8/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 8/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 8/7/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFHpA 8/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
NMeFOSAA 8/7/2024 <0.006 µg/L 0.006 µg/L Not Detected
NEtFOSAA 8/7/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFTrDA 8/7/2024 <0.007 µg/L 0.007 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.