PFAS Comply

CHELMSFORD WATER DISTRICT

PWSID: MA3056000 · CHELMSFORD, MA · Serving 28,750 people

Type: CWSOwner: LSource: GW
Settlement eligible
May qualify for 3M/DuPont settlement funds
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Exceeds MCL

One or more PFAS compounds exceed EPA Maximum Contaminant Levels. Corrective action required by 2031.

Key contaminants vs MCL

PFOA8.9 ppt(MCL: 4 ppt)
PFOS7.2 ppt(MCL: 4 ppt)

EPA MCL: 4 ppt (parts per trillion) for PFOA and PFOS individually. Compliance deadline: 2031-12-31

Detection summary

5
PFAS compounds detected
8.9 ppt
Highest single detection
2024-05-14
Latest sample date
complete
Data completeness

All PFAS detection results

Source: EPA UCMR5 (UCMR5)

ContaminantResult (ppt)MCL (ppt)StatusSample date
PFEESAND—Below MRL2024-04-09
PFPeSND—Below MRL2023-12-27
PFBSND—Below MRL2023-12-27
PFHpAND—Below MRL2023-12-27
PFHxSND10Below MRL2023-12-27
PFNAND10Below MRL2023-12-27
PFMPAND—Below MRL2024-10-08
PFPeAND—Below MRL2024-10-08
PFMBAND—Below MRL2024-10-08
PFEESAND—Below MRL2024-10-08
NFDHAND—Below MRL2024-10-08
PFPeSND—Below MRL2024-10-08
PFHpSND—Below MRL2024-10-08
PFTAND—Below MRL2024-10-08
PFTrDAND—Below MRL2024-10-08
6:2 FTSND—Below MRL2024-10-08
NMeFOSAAND—Below MRL2024-10-08
PFDAND—Below MRL2024-10-08
NEtFOSAAND—Below MRL2024-10-08
PFBAND—Below MRL2024-10-08
HFPO-DAND10Below MRL2024-10-08
ADONAND—Below MRL2024-10-08
9Cl-PF3ONSND—Below MRL2024-10-08
11Cl-PF3OUdSND—Below MRL2024-10-08
PFUnAND—Below MRL2024-10-08
PFDoAND—Below MRL2024-10-08
PFNAND10Below MRL2024-10-08
PFHxSND10Below MRL2024-10-08
PFHpAND—Below MRL2024-10-08
PFBSND—Below MRL2024-10-08
lithiumND—Below MRL2024-10-08
PFDAND—Below MRL2023-12-27
PFHpSND—Below MRL2023-12-27
PFTAND—Below MRL2023-10-12
NMeFOSAAND—Below MRL2023-10-12
lithiumND—Below MRL2023-10-12
4:2 FTSND—Below MRL2023-12-27
PFUnAND—Below MRL2023-12-27
11Cl-PF3OUdSND—Below MRL2023-12-27
9Cl-PF3ONSND—Below MRL2023-12-27
ADONAND—Below MRL2023-12-27
HFPO-DAND10Below MRL2023-12-27
PFBAND—Below MRL2023-12-27
6:2 FTSND—Below MRL2023-12-27
NEtFOSAAND—Below MRL2023-10-12
PFTrDAND—Below MRL2023-10-12
PFMPAND—Below MRL2023-12-27
PFMBAND—Below MRL2023-12-27
PFEESAND—Below MRL2023-12-27
NFDHAND—Below MRL2023-12-27
8:2 FTSND—Below MRL2023-12-27
PFEESAND—Below MRL2024-04-09
PFNAND10Below MRL2024-04-09
PFHxSND10Below MRL2024-04-09
PFHpAND—Below MRL2024-04-09
PFBSND—Below MRL2024-04-09
PFMPAND—Below MRL2024-04-09
PFMBAND—Below MRL2024-04-09
PFDoAND—Below MRL2024-04-09
NFDHAND—Below MRL2024-04-09
PFPeSND—Below MRL2024-04-09
lithiumND—Below MRL2024-04-09
8:2 FTSND—Below MRL2024-04-09
PFDAND—Below MRL2024-04-09
PFUnAND—Below MRL2024-04-09
11Cl-PF3OUdSND—Below MRL2024-04-09
9Cl-PF3ONSND—Below MRL2024-04-09
ADONAND—Below MRL2024-04-09
HFPO-DAND10Below MRL2024-04-09
PFBAND—Below MRL2024-04-09
6:2 FTSND—Below MRL2024-04-09
PFTAND—Below MRL2024-04-09
PFHpSND—Below MRL2024-04-09
4:2 FTSND—Below MRL2024-04-09
PFTrDAND—Below MRL2024-04-09
NEtFOSAAND—Below MRL2024-04-09
NMeFOSAAND—Below MRL2024-04-09
4:2 FTSND—Below MRL2023-10-12
8:2 FTSND—Below MRL2023-10-12
PFMPAND—Below MRL2023-10-12
PFMBAND—Below MRL2023-10-12
PFEESAND—Below MRL2023-10-12
6:2 FTSND—Below MRL2023-10-12
lithiumND—Below MRL2023-10-12
NFDHAND—Below MRL2023-10-12
PFTAND—Below MRL2023-10-12
PFTrDAND—Below MRL2023-10-12
NEtFOSAAND—Below MRL2023-10-12
NMeFOSAAND—Below MRL2023-10-12
PFPeSND—Below MRL2023-10-12
PFHpAND—Below MRL2023-10-12
PFHpSND—Below MRL2023-10-12
PFBSND—Below MRL2023-10-12
PFBAND—Below MRL2023-10-12
PFHxSND10Below MRL2023-10-12
PFNAND10Below MRL2023-10-12
PFOSND4Below MRL2023-10-12
PFDAND—Below MRL2023-10-12
9Cl-PF3ONSND—Below MRL2023-10-12
PFDoAND—Below MRL2023-10-12
ADONAND—Below MRL2023-10-12
11Cl-PF3OUdSND—Below MRL2023-10-12
PFUnAND—Below MRL2023-10-12
HFPO-DAND10Below MRL2023-10-12
PFHpSND—Below MRL2024-04-09
lithiumND—Below MRL2024-04-09
4:2 FTSND—Below MRL2024-04-09
PFBAND—Below MRL2024-04-09
PFEESAND—Below MRL2024-04-09
PFPeSND—Below MRL2024-04-09
NFDHAND—Below MRL2024-04-09
6:2 FTSND—Below MRL2024-04-09
HFPO-DAND10Below MRL2024-04-09
8:2 FTSND—Below MRL2024-04-09
PFMPAND—Below MRL2024-04-09
PFHxSND10Below MRL2024-04-09
PFDoAND—Below MRL2024-04-09
ADONAND—Below MRL2024-04-09
9Cl-PF3ONSND—Below MRL2024-04-09
11Cl-PF3OUdSND—Below MRL2024-04-09
PFUnAND—Below MRL2024-04-09
PFDAND—Below MRL2024-04-09
PFBSND—Below MRL2024-04-09
PFNAND10Below MRL2024-04-09
PFHpAND—Below MRL2024-04-09
PFMBAND—Below MRL2024-04-09
NMeFOSAAND—Below MRL2024-04-09
NEtFOSAAND—Below MRL2024-04-09
PFTrDAND—Below MRL2024-04-09
PFTAND—Below MRL2024-04-09
PFOSND4Below MRL2024-04-09
11Cl-PF3OUdSND—Below MRL2023-10-12
lithiumND—Below MRL2023-10-12
PFTAND—Below MRL2023-10-12
PFTrDAND—Below MRL2023-10-12
NEtFOSAAND—Below MRL2023-10-12
NMeFOSAAND—Below MRL2023-10-12
PFHxSND10Below MRL2023-10-12
PFNAND10Below MRL2023-10-12
PFDAND—Below MRL2023-10-12
PFDoAND—Below MRL2023-10-12
PFHpAND—Below MRL2023-10-12
PFUnAND—Below MRL2023-10-12
8:2 FTSND—Below MRL2023-10-12
PFPeSND—Below MRL2023-10-12
NFDHAND—Below MRL2023-10-12
PFEESAND—Below MRL2023-10-12
PFMBAND—Below MRL2023-10-12
PFMPAND—Below MRL2023-10-12
PFHpSND—Below MRL2023-10-12
4:2 FTSND—Below MRL2023-10-12
6:2 FTSND—Below MRL2023-10-12
PFBAND—Below MRL2023-10-12
HFPO-DAND10Below MRL2023-10-12
ADONAND—Below MRL2023-10-12
9Cl-PF3ONSND—Below MRL2023-10-12
PFMBAND—Below MRL2024-04-09
PFHxSND10Below MRL2024-04-09
NFDHAND—Below MRL2024-04-09
PFTAND—Below MRL2024-04-09
PFTrDAND—Below MRL2024-04-09
NEtFOSAAND—Below MRL2024-04-09
NMeFOSAAND—Below MRL2024-04-09
lithiumND—Below MRL2024-04-09
PFBAND—Below MRL2024-04-09
PFHpAND—Below MRL2024-04-09
PFNAND10Below MRL2024-04-09
PFOSND4Below MRL2024-04-09
PFOAND4Below MRL2024-04-09
PFDAND—Below MRL2024-04-09
PFDoAND—Below MRL2024-04-09
PFMPAND—Below MRL2024-04-09
PFBSND—Below MRL2024-04-09
HFPO-DAND10Below MRL2024-04-09
PFHxAND—Below MRL2024-04-09
PFPeSND—Below MRL2024-04-09
PFPeAND—Below MRL2024-04-09
PFHpSND—Below MRL2024-04-09
8:2 FTSND—Below MRL2024-04-09
4:2 FTSND—Below MRL2024-04-09
6:2 FTSND—Below MRL2024-04-09
ADONAND—Below MRL2024-04-09
9Cl-PF3ONSND—Below MRL2024-04-09
11Cl-PF3OUdSND—Below MRL2024-04-09
PFUnAND—Below MRL2024-04-09
PFDoAND—Below MRL2023-12-27
8:2 FTSND—Below MRL2024-05-14
PFPeSND—Below MRL2024-05-14
PFPeAND—Below MRL2024-05-14
PFMBAND—Below MRL2024-05-14
PFEESAND—Below MRL2024-05-14
NFDHAND—Below MRL2024-05-14
PFHpSND—Below MRL2024-05-14
PFNAND10Below MRL2024-05-14
lithiumND—Below MRL2024-04-16
PFTAND—Below MRL2024-04-16
PFTrDAND—Below MRL2024-04-16
NMeFOSAAND—Below MRL2024-04-16
4:2 FTSND—Below MRL2024-05-14
NEtFOSAAND—Below MRL2024-04-16
PFMPAND—Below MRL2024-05-14
PFHpAND—Below MRL2024-05-14
6:2 FTSND—Below MRL2024-05-14
PFBSND—Below MRL2024-05-14
PFDAND—Below MRL2024-05-14
PFDoAND—Below MRL2024-05-14
PFUnAND—Below MRL2024-05-14
11Cl-PF3OUdSND—Below MRL2024-05-14
9Cl-PF3ONSND—Below MRL2024-05-14
ADONAND—Below MRL2024-05-14
HFPO-DAND10Below MRL2024-05-14
PFBAND—Below MRL2024-05-14
PFHxSND10Below MRL2024-05-14
4:2 FTSND—Below MRL2024-10-08
8:2 FTSND—Below MRL2024-10-08
PFOA8.94Exceeds2023-10-12
PFOA7.74Exceeds2023-12-27
PFOA7.74Exceeds2024-05-14
PFOA7.34Exceeds2024-10-08
PFOA7.24Exceeds2024-04-09
PFOS7.24Exceeds2023-10-12
PFOA7.14Exceeds2023-10-12
PFOA6.74Exceeds2024-04-09
PFOS5.84Exceeds2024-10-08
PFOS5.54Exceeds2024-05-14
PFOS5.34Exceeds2023-12-27
PFOS4.54Exceeds2024-04-09
PFBS4.2—2023-10-12
PFPeA3.7—2023-12-27
PFPeA3.6—2023-10-12
PFHxA3.5—2023-12-27
PFPeA3.4—2023-10-12
PFHxA3.3—2023-10-12
PFPeA3.2—2024-04-09
PFHxA3.2—2024-04-09
PFHxA3.2—2023-10-12
PFPeA3.1—2024-04-09
PFHxA3.1—2024-04-09
PFHxA3.1—2024-05-14
PFHxA3.1—2024-10-08

Next steps