PlainWater
States → Washington

MODEL IRRIGATION DIST #18

PWS ID: WA5355550 · Spokane, Washington 99206

PFAS Detected

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

Population Served
7,903
Total Violations
204
Health-Based Violations
17
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
2,615
County
Spokane
School/Daycare
No
MCL Violations
17
Monitoring Violations
185
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 17 2000
Nitrate MR 16 2006
1,2,4-Trichlorobenzene MR 6 2008
cis-1,2-Dichloroethylene MR 6 2008
DICHLOROMETHANE MR 6 2008
o-Dichlorobenzene MR 6 2008
p-Dichlorobenzene MR 6 2008
Vinyl chloride MR 6 2008
trans-1,2-Dichloroethylene MR 6 2008
1,2-Dichloroethane MR 6 2008
Carbon tetrachloride MR 6 2008
1,2-Dichloropropane MR 6 2008
1,1,2-Trichloroethane MR 6 2008
Tetrachloroethylene MR 6 2008
CHLOROBENZENE MR 6 2008
Toluene MR 6 2008
Ethylbenzene MR 6 2008
Styrene MR 6 2008
1,1-Dichloroethylene MR 6 2008
1,1,1-Trichloroethane MR 6 2008
Benzene MR 6 2008
Trichloroethylene MR 6 2008
Barium MR 4 2005
Mercury MR 4 2005
Nickel MR 4 2005
Beryllium, Total MR 4 2005
Thallium, Total MR 4 2005
Cadmium MR 4 2005
Fluoride MR 4 2005
CYANIDE MR 4 2005

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 5 of 180 samples detected PFAS.

Contaminant Date Result MRL Status
PFNA 6/16/2025 <0.004 µg/L 0.004 µg/L Not Detected
HFPO-DA 6/16/2025 <0.005 µg/L 0.005 µg/L Not Detected
ADONA 6/16/2025 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 6/16/2025 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 6/16/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFUnA 6/16/2025 <0.002 µg/L 0.002 µg/L Not Detected
PFDoA 6/16/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFBA 6/16/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFOS 6/16/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFHxA 6/16/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 6/16/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 6/16/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 6/16/2025 <0.003 µg/L 0.003 µg/L Not Detected
NEtFOSAA 6/16/2025 <0.005 µg/L 0.005 µg/L Not Detected
lithium 6/16/2025 10.0000 µg/L 9 µg/L Detected
NMeFOSAA 6/16/2025 <0.006 µg/L 0.006 µg/L Not Detected
PFOA 6/16/2025 <0.004 µg/L 0.004 µg/L Not Detected
NFDHA 6/16/2025 <0.02 µg/L 0.02 µg/L Not Detected
PFTrDA 6/16/2025 <0.007 µg/L 0.007 µg/L Not Detected
PFTA 6/16/2025 <0.008 µg/L 0.008 µg/L Not Detected
PFHpS 6/16/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 6/16/2025 <0.004 µg/L 0.004 µg/L Not Detected
6:2 FTS 6/16/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFDA 6/16/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 6/16/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 6/16/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 6/16/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 6/16/2025 <0.004 µg/L 0.004 µg/L Not Detected
8:2 FTS 6/16/2025 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 6/16/2025 <0.003 µg/L 0.003 µg/L Not Detected
NMeFOSAA 6/16/2025 <0.006 µg/L 0.006 µg/L Not Detected
PFHxA 6/16/2025 <0.003 µg/L 0.003 µg/L Not Detected
11Cl-PF3OUdS 6/16/2025 <0.005 µg/L 0.005 µg/L Not Detected
9Cl-PF3ONS 6/16/2025 <0.002 µg/L 0.002 µg/L Not Detected
ADONA 6/16/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 6/16/2025 <0.002 µg/L 0.002 µg/L Not Detected
HFPO-DA 6/16/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 6/16/2025 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 6/16/2025 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 6/16/2025 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 6/16/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFTrDA 6/16/2025 <0.007 µg/L 0.007 µg/L Not Detected
PFOS 6/16/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFHxS 6/16/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFTA 6/16/2025 <0.008 µg/L 0.008 µg/L Not Detected
PFMPA 6/16/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFNA 6/16/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFHpA 6/16/2025 <0.003 µg/L 0.003 µg/L Not Detected
NEtFOSAA 6/16/2025 <0.005 µg/L 0.005 µg/L Not Detected
lithium 6/16/2025 <9 µg/L 9 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.