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States → California

MT. SHASTA, CITY OF

PWS ID: CA4710008 · MT. SHASTA, California 96067

Population Served
3,642
Total Violations
36
Health-Based Violations
26
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
1,884
County
Siskiyou
School/Daycare
No
MCL Violations
23
Monitoring Violations
2
Treatment Tech Violations
3

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 14 2016
Revised Total Coliform Rule MCL 9 2017
Coliform (TCR) MR 2 2014
Revised Total Coliform Rule TT 2 2019
LEAD AND COPPER RULE REVISIONS RPT 1 2024
LEAD AND COPPER RULE REVISIONS TT 1 2024

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 180 samples detected PFAS.

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