PlainWater
States09

Graton Resort and Casino

PWS ID: 090605174 · Rohnert Park, 09 94928

PFAS Detected

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

Population Served
10,127
Total Violations
3
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Non-Transient Non-Community
Owner Type
Native American
Connections
1
School/Daycare
No
MCL Violations
0
Monitoring Violations
3
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
TTHM MR 1 2014
Total Haloacetic Acids (HAA5) MR 1 2014
Lead and Copper Rule MR 1 2014

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 2 of 60 samples detected PFAS.

Contaminant Date Result MRL Status
PFOA 5/24/2023 <0.004 µg/L 0.004 µg/L Not Detected
NEtFOSAA 5/24/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFHpS 5/24/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 5/24/2023 <0.004 µg/L 0.004 µg/L Not Detected
NFDHA 5/24/2023 <0.02 µg/L 0.02 µg/L Not Detected
PFEESA 5/24/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 5/24/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 5/24/2023 <0.003 µg/L 0.003 µg/L Not Detected
ADONA 5/24/2023 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 5/24/2023 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 5/24/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFUnA 5/24/2023 <0.002 µg/L 0.002 µg/L Not Detected
PFHxA 5/24/2023 <0.003 µg/L 0.003 µg/L Not Detected
NMeFOSAA 5/24/2023 <0.006 µg/L 0.006 µg/L Not Detected
PFDA 5/24/2023 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 5/24/2023 <0.005 µg/L 0.005 µg/L Not Detected
HFPO-DA 5/24/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFTrDA 5/24/2023 <0.007 µg/L 0.007 µg/L Not Detected
PFTA 5/24/2023 <0.008 µg/L 0.008 µg/L Not Detected
lithium 5/24/2023 16.0000 µg/L 9 µg/L Detected
PFBA 5/24/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFDoA 5/24/2023 <0.003 µg/L 0.003 µg/L Not Detected
4:2 FTS 5/24/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 5/24/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFBS 5/24/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 5/24/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 5/24/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 5/24/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 5/24/2023 <0.004 µg/L 0.004 µg/L Not Detected
6:2 FTS 5/24/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFOS 11/2/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFBS 11/2/2023 <0.003 µg/L 0.003 µg/L Not Detected
4:2 FTS 11/2/2023 <0.003 µg/L 0.003 µg/L Not Detected
lithium 11/2/2023 16.0000 µg/L 9 µg/L Detected
NMeFOSAA 11/2/2023 <0.006 µg/L 0.006 µg/L Not Detected
NEtFOSAA 11/2/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFTrDA 11/2/2023 <0.007 µg/L 0.007 µg/L Not Detected
PFTA 11/2/2023 <0.008 µg/L 0.008 µg/L Not Detected
8:2 FTS 11/2/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFHpS 11/2/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 11/2/2023 <0.004 µg/L 0.004 µg/L Not Detected
NFDHA 11/2/2023 <0.02 µg/L 0.02 µg/L Not Detected
PFEESA 11/2/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 11/2/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 11/2/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 11/2/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFHpA 11/2/2023 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 11/2/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 11/2/2023 <0.005 µg/L 0.005 µg/L Not Detected
HFPO-DA 11/2/2023 <0.005 µg/L 0.005 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.