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States → Massachusetts

NATICK WATER AND SEWER DIVISION

PWS ID: MA3198000 · NATICK, Massachusetts 01760

PFAS Detected

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

Population Served
37,006
Total Violations
146
Health-Based Violations
3
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
11,142
County
Middlesex
School/Daycare
No
MCL Violations
3
Monitoring Violations
132
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
cis-1,2-Dichloroethylene MR 6 2014
Xylenes, Total MR 6 2014
DICHLOROMETHANE MR 6 2014
o-Dichlorobenzene MR 6 2014
p-Dichlorobenzene MR 6 2014
Vinyl chloride MR 6 2014
1,1-Dichloroethylene MR 6 2014
1,2-Dichloroethane MR 6 2014
1,1,1-Trichloroethane MR 6 2014
Trichloroethylene MR 6 2014
1,1,2-Trichloroethane MR 6 2014
Tetrachloroethylene MR 6 2014
CHLOROBENZENE MR 6 2014
Benzene MR 6 2014
Toluene MR 6 2014
Styrene MR 6 2014
1,2,4-Trichlorobenzene MR 6 2014
Carbon tetrachloride MR 6 2014
trans-1,2-Dichloroethylene MR 6 2014
1,2-Dichloropropane MR 6 2014
Ethylbenzene MR 6 2014
Coliform (TCR) MCL 3 2000
TTHM MR 2 2007
Coliform (TCR) MR 1 1992
Total Haloacetic Acids (HAA5) MR 1 2007
E. COLI MR 1 2011
Nitrite MR 1 1997

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 17 of 240 samples detected PFAS.

Contaminant Date Result MRL Status
11Cl-PF3OUdS 6/11/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFHxS 6/11/2025 0.0040 µg/L 0.003 µg/L Detected
PFTA 6/11/2025 <0.008 µg/L 0.008 µg/L Not Detected
PFTrDA 6/11/2025 <0.007 µg/L 0.007 µg/L Not Detected
NEtFOSAA 6/11/2025 <0.005 µg/L 0.005 µg/L Not Detected
NMeFOSAA 6/11/2025 <0.006 µg/L 0.006 µg/L Not Detected
lithium 6/11/2025 <9 µg/L 9 µg/L Not Detected
PFHxA 6/11/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 6/11/2025 <0.002 µg/L 0.002 µg/L Not Detected
PFMBA 6/11/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 6/11/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFDA 6/11/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 6/11/2025 0.0097 µg/L 0.004 µg/L Detected
PFOS 6/11/2025 0.0271 µg/L 0.004 µg/L Detected
PFNA 6/11/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFHpA 6/11/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHpS 6/11/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 6/11/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFBS 6/11/2025 0.0030 µg/L 0.003 µg/L Detected
PFEESA 6/11/2025 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 6/11/2025 <0.002 µg/L 0.002 µg/L Not Detected
PFPeA 6/11/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 6/11/2025 <0.004 µg/L 0.004 µg/L Not Detected
8:2 FTS 6/11/2025 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 6/11/2025 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 6/11/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 6/11/2025 <0.005 µg/L 0.005 µg/L Not Detected
HFPO-DA 6/11/2025 <0.005 µg/L 0.005 µg/L Not Detected
ADONA 6/11/2025 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 6/11/2025 <0.02 µg/L 0.02 µg/L Not Detected
PFBS 6/11/2025 0.0030 µg/L 0.003 µg/L Detected
lithium 6/11/2025 <9 µg/L 9 µg/L Not Detected
NEtFOSAA 6/11/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFPeA 6/11/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 6/11/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 6/11/2025 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 6/11/2025 <0.02 µg/L 0.02 µg/L Not Detected
PFPeS 6/11/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFMPA 6/11/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFTrDA 6/11/2025 <0.007 µg/L 0.007 µg/L Not Detected
PFTA 6/11/2025 <0.008 µg/L 0.008 µg/L Not Detected
PFHpA 6/11/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 6/11/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 6/11/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 6/11/2025 0.0040 µg/L 0.004 µg/L Detected
PFOA 6/11/2025 0.0042 µg/L 0.004 µg/L Detected
PFDA 6/11/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHpS 6/11/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 6/11/2025 <0.003 µg/L 0.003 µg/L Not Detected
NMeFOSAA 6/11/2025 <0.006 µg/L 0.006 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.