PlainWater
States → Arizona

FLOWING WELLS IRRIGATION DISTRICT

PWS ID: AZ0410051 · TUCSON, Arizona 85705

PFAS Detected

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

Population Served
16,000
Total Violations
936
Health-Based Violations
5
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
3,662
County
Pima
School/Daycare
No
MCL Violations
1
Monitoring Violations
893
Treatment Tech Violations
4

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Chlorine MR 24 2021
TTHM MR 20 2024
Total Haloacetic Acids (HAA5) MR 20 2024
Di(2-ethylhexyl) phthalate MR 18 2004
Endothall MR 18 2004
trans-1,2-Dichloroethylene MR 17 2025
1,2-Dichloroethane MR 17 2025
1,1,1-Trichloroethane MR 17 2025
Carbon tetrachloride MR 17 2025
1,2-Dichloropropane MR 17 2025
Trichloroethylene MR 17 2025
Benzene MR 17 2025
Toluene MR 17 2025
Styrene MR 17 2025
1,2,4-Trichlorobenzene MR 17 2025
cis-1,2-Dichloroethylene MR 17 2025
DICHLOROMETHANE MR 17 2025
o-Dichlorobenzene MR 17 2025
p-Dichlorobenzene MR 17 2025
Tetrachloroethylene MR 17 2025
CHLOROBENZENE MR 17 2025
Xylenes, Total MR 17 2025
Ethylbenzene MR 17 2025
1,1-Dichloroethylene MR 17 2025
1,1,2-Trichloroethane MR 17 2025
Toxaphene MR 16 2004
Dalapon MR 16 2004
Glyphosate MR 16 2004
OXAMYL MR 16 2004
Picloram MR 16 2004

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 26 of 360 samples detected PFAS.

Contaminant Date Result MRL Status
PFUnA 8/3/2023 <0.002 µg/L 0.002 µg/L Not Detected
PFMPA 8/3/2023 <0.004 µg/L 0.004 µg/L Not Detected
8:2 FTS 8/3/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFTA 8/3/2023 <0.008 µg/L 0.008 µg/L Not Detected
PFTrDA 8/3/2023 <0.007 µg/L 0.007 µg/L Not Detected
NEtFOSAA 8/3/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFMBA 8/3/2023 <0.003 µg/L 0.003 µg/L Not Detected
4:2 FTS 8/3/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 8/3/2023 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 8/3/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 8/3/2023 <0.005 µg/L 0.005 µg/L Not Detected
HFPO-DA 8/3/2023 <0.005 µg/L 0.005 µg/L Not Detected
ADONA 8/3/2023 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 8/3/2023 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 8/3/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFHxA 8/3/2023 <0.003 µg/L 0.003 µg/L Not Detected
NMeFOSAA 8/3/2023 <0.006 µg/L 0.006 µg/L Not Detected
PFDoA 8/3/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 8/3/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 8/3/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 8/3/2023 0.0050 µg/L 0.003 µg/L Detected
PFNA 8/3/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFOA 8/3/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFPeA 8/3/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFOS 8/3/2023 <0.004 µg/L 0.004 µg/L Not Detected
lithium 8/3/2023 108.0000 µg/L 9 µg/L Detected
PFHpS 8/3/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 8/3/2023 <0.004 µg/L 0.004 µg/L Not Detected
NFDHA 8/3/2023 <0.02 µg/L 0.02 µg/L Not Detected
PFDA 8/3/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 8/3/2023 0.0030 µg/L 0.003 µg/L Detected
8:2 FTS 8/3/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFBS 8/3/2023 0.0040 µg/L 0.003 µg/L Detected
ADONA 8/3/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHpS 8/3/2023 <0.003 µg/L 0.003 µg/L Not Detected
11Cl-PF3OUdS 8/3/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFPeA 8/3/2023 0.0030 µg/L 0.003 µg/L Detected
lithium 8/3/2023 9.2000 µg/L 9 µg/L Detected
PFTA 8/3/2023 <0.008 µg/L 0.008 µg/L Not Detected
PFTrDA 8/3/2023 <0.007 µg/L 0.007 µg/L Not Detected
HFPO-DA 8/3/2023 <0.005 µg/L 0.005 µg/L Not Detected
NMeFOSAA 8/3/2023 <0.006 µg/L 0.006 µg/L Not Detected
9Cl-PF3ONS 8/3/2023 <0.002 µg/L 0.002 µg/L Not Detected
PFHpA 8/3/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 8/3/2023 0.0080 µg/L 0.003 µg/L Detected
PFNA 8/3/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 8/3/2023 0.0040 µg/L 0.004 µg/L Detected
PFOA 8/3/2023 0.0050 µg/L 0.004 µg/L Detected
PFDA 8/3/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 8/3/2023 <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.