PlainWater
States → California

MUSCOY MWC NO. 1

PWS ID: CA3610031 · SAN BERNARDINO, California 92407

Population Served
13,000
Total Violations
45
Health-Based Violations
6
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
1,459
County
San Bernardino
School/Daycare
No
MCL Violations
6
Monitoring Violations
36
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Revised Total Coliform Rule MON 32 2024
Coliform (TCR) MCL 6 2009
Coliform (TCR) MR 4 2012

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 60 samples detected PFAS.

Contaminant Date Result MRL Status
NEtFOSAA 8/12/2024 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 8/12/2024 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 8/12/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFMPA 8/12/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFPeA 8/12/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 8/12/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 8/12/2024 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 8/12/2024 <0.02 µg/L 0.02 µg/L Not Detected
PFPeS 8/12/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFHpS 8/12/2024 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 8/12/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFTrDA 8/12/2024 <0.007 µg/L 0.007 µg/L Not Detected
PFOS 8/12/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFTA 8/12/2024 <0.008 µg/L 0.008 µg/L Not Detected
PFBA 8/12/2024 <0.005 µg/L 0.005 µg/L Not Detected
HFPO-DA 8/12/2024 <0.005 µg/L 0.005 µg/L Not Detected
ADONA 8/12/2024 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 8/12/2024 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 8/12/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFUnA 8/12/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFDA 8/12/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 8/12/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFHxS 8/12/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 8/12/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 8/12/2024 <0.003 µg/L 0.003 µg/L Not Detected
lithium 8/12/2024 <9 µg/L 9 µg/L Not Detected
NMeFOSAA 8/12/2024 <0.006 µg/L 0.006 µg/L Not Detected
PFDoA 8/12/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 8/12/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 8/12/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFEESA 2/22/2024 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 2/22/2024 <0.002 µg/L 0.002 µg/L Not Detected
ADONA 2/22/2024 <0.003 µg/L 0.003 µg/L Not Detected
HFPO-DA 2/22/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 2/22/2024 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 2/22/2024 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 2/22/2024 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 2/22/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFMPA 2/22/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFMBA 2/22/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHpS 2/22/2024 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 2/22/2024 <0.02 µg/L 0.02 µg/L Not Detected
PFPeS 2/22/2024 <0.004 µg/L 0.004 µg/L Not Detected
11Cl-PF3OUdS 2/22/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFTA 2/22/2024 <0.008 µg/L 0.008 µg/L Not Detected
PFPeA 2/22/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 2/22/2024 <0.003 µg/L 0.003 µg/L Not Detected
NEtFOSAA 2/22/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFTrDA 2/22/2024 <0.007 µg/L 0.007 µg/L Not Detected
PFUnA 2/22/2024 <0.002 µg/L 0.002 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.