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States → 09

GRIC DPW Wild Horse Pass

PWS ID: 090400692 · Sacaton, 09 85147

PFAS Detected

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

Population Served
22,795
Total Violations
72
Health-Based Violations
15
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Native American
Connections
820
School/Daycare
No
MCL Violations
13
Monitoring Violations
42
Treatment Tech Violations
2

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 36 2008
Coliform (TCR) MCL 10 2015
Nitrate MR 3 2006
Arsenic MCL 2 2009
LEAD AND COPPER RULE REVISIONS TT 2 2024
Asbestos MR 1 2001
Revised Total Coliform Rule MCL 1 2018
Arsenic MR 1 2023
Lead and Copper Rule MR 1 2023

PFAS Testing Results (UCMR5)

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

Contaminant Date Result MRL Status
6:2 FTS 5/20/2025 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 5/20/2025 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 5/20/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFMPA 5/20/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFPeA 5/20/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 5/20/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 5/20/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFHpS 5/20/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 5/20/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFBA 5/20/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFHpA 5/20/2025 <0.003 µg/L 0.003 µg/L Not Detected
HFPO-DA 5/20/2025 <0.005 µg/L 0.005 µg/L Not Detected
NFDHA 5/20/2025 <0.02 µg/L 0.02 µg/L Not Detected
PFBS 5/20/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 5/20/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 5/20/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 5/20/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFOA 5/20/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFDoA 5/20/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 5/20/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 5/20/2025 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 5/20/2025 <0.005 µg/L 0.005 µg/L Not Detected
ADONA 5/20/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFDA 5/20/2025 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 5/20/2025 <0.002 µg/L 0.002 µg/L Not Detected
NEtFOSAA 4/30/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFTrDA 4/30/2025 <0.007 µg/L 0.007 µg/L Not Detected
NMeFOSAA 4/30/2025 <0.006 µg/L 0.006 µg/L Not Detected
PFTA 4/30/2025 <0.008 µg/L 0.008 µg/L Not Detected
lithium 4/30/2025 103.0000 µg/L 9 µg/L Detected
PFDoA 4/30/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFDA 4/30/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 4/30/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 4/30/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFNA 4/30/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFHxS 4/30/2025 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 4/30/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFBS 4/30/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 4/30/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFHxA 4/30/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 4/30/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 4/30/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 4/30/2025 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 4/30/2025 <0.005 µg/L 0.005 µg/L Not Detected
9Cl-PF3ONS 4/30/2025 <0.002 µg/L 0.002 µg/L Not Detected
ADONA 4/30/2025 <0.003 µg/L 0.003 µg/L Not Detected
HFPO-DA 4/30/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 4/30/2025 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 4/30/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFMBA 4/30/2025 <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.