Connecticut PFAS compliance
PFAS contamination data for 500 water systems in Connecticut, serving 1,161,543 people.
Total systems
500
Exceed MCL
2
At risk
0
Compliant
1
Settlement eligible
2
Connecticut PFAS regulatory overview
State standards
State standardsConnecticut has its own PFAS standards
PFOA MCL: 12 ppt(EPA: 4 ppt)
PFOS MCL: 12 ppt(EPA: 4 ppt)
CT action levels: PFOA 12 ppt, PFOS 12 ppt, PFHxS 16 ppt, PFNA 11 ppt, PFDA 10 ppt. New 2026 PFAS product restrictions taking effect.
Regulatory agency
Connecticut has action levels stricter than EPA for some compounds. New 2026 law restricts PFAS in consumer products.
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Water systems
| System | City | Population | PFOA (ppt) | PFOS (ppt) | Status |
|---|---|---|---|---|---|
| REGIONAL WATER AUTHORITY CT0930011 | NEW HAVEN | 418,900 | 7.1 | 10.7 | Exceeds |
| METROPOLITAN DISTRICT COMMISSION CT0640011 | HARTFORD | 390,887 | — | — | Compliant |
| AQUARION-EASTERN FAIRFIELD COUNTY CT0150011 | SHELTON | 351,756 | 10.9 | 6.6 | Exceeds |