PlainWater
States → Connecticut

DANBURY WATER DEPARTMENT

PWS ID: CT0340011 · DANBURY, Connecticut 06810

PFAS Detected

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

Population Served
62,055
Total Violations
326
Health-Based Violations
4
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
11,000
County
Fairfield
School/Daycare
No
MCL Violations
0
Monitoring Violations
293
Treatment Tech Violations
4

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Nitrate MR 8 2012
Nitrite MR 8 2012
Total Haloacetic Acids (HAA5) MR 8 2021
CARBON, TOTAL MR 6 2017
BHC-GAMMA MR 5 1996
Toxaphene MR 5 1996
2,4,5-TP MR 5 1996
Aldicarb MR 5 1996
Aldicarb sulfone MR 5 1996
LASSO MR 5 1996
TTHM MR 5 2017
Lead and Copper Rule MR 5 2020
Atrazine MR 5 1996
Benzo(a)pyrene MR 5 1996
Dalapon MR 5 1996
Di(2-ethylhexyl) phthalate MR 5 1996
Endothall MR 5 1996
Glyphosate MR 5 1996
HEXACHLOROBENZENE MR 5 1996
Carbofuran MR 5 1996
Simazine MR 5 1996
2,3,7,8-TCDD MR 5 1996
2,4-D MR 5 1996
ETHYLENE DIBROMIDE MR 5 1996
Heptachlor MR 5 1996
Heptachlor epoxide MR 5 1996
Dinoseb MR 5 1996
Picloram MR 5 1996
Chlordane MR 5 1996
Di(2-ethylhexyl) adipate MR 5 1996

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 16 of 240 samples detected PFAS.

Contaminant Date Result MRL Status
PFTA 9/17/2025 <0.008 µg/L 0.008 µg/L Not Detected
lithium 9/17/2025 <9 µg/L 9 µg/L Not Detected
PFHxS 9/17/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHpS 9/17/2025 <0.003 µg/L 0.003 µg/L Not Detected
NEtFOSAA 9/17/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFTrDA 9/17/2025 <0.007 µg/L 0.007 µg/L Not Detected
NMeFOSAA 9/17/2025 <0.006 µg/L 0.006 µg/L Not Detected
PFHpA 9/17/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 9/17/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 9/17/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFOA 9/17/2025 0.0050 µg/L 0.004 µg/L Detected
PFDA 9/17/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 9/17/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 9/17/2025 0.0036 µg/L 0.003 µg/L Detected
PFUnA 9/17/2025 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 9/17/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFMBA 9/17/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 9/17/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFBS 9/17/2025 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 9/17/2025 <0.002 µg/L 0.002 µg/L Not Detected
NFDHA 9/17/2025 <0.02 µg/L 0.02 µg/L Not Detected
PFEESA 9/17/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 9/17/2025 0.0034 µg/L 0.003 µg/L Detected
PFMPA 9/17/2025 <0.004 µg/L 0.004 µg/L Not Detected
8:2 FTS 9/17/2025 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 9/17/2025 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 9/17/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 9/17/2025 <0.005 µg/L 0.005 µg/L Not Detected
HFPO-DA 9/17/2025 <0.005 µg/L 0.005 µg/L Not Detected
ADONA 9/17/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFTA 9/17/2025 <0.008 µg/L 0.008 µg/L Not Detected
6:2 FTS 9/17/2025 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 9/17/2025 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 9/17/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFMPA 9/17/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFMBA 9/17/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 9/17/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFBA 9/17/2025 <0.005 µg/L 0.005 µg/L Not Detected
lithium 9/17/2025 <9 µg/L 9 µg/L Not Detected
PFTrDA 9/17/2025 <0.007 µg/L 0.007 µg/L Not Detected
NEtFOSAA 9/17/2025 <0.005 µg/L 0.005 µg/L Not Detected
NMeFOSAA 9/17/2025 <0.006 µg/L 0.006 µg/L Not Detected
NFDHA 9/17/2025 <0.02 µg/L 0.02 µg/L Not Detected
PFOA 9/17/2025 0.0044 µg/L 0.004 µg/L Detected
PFHpS 9/17/2025 <0.003 µg/L 0.003 µg/L Not Detected
HFPO-DA 9/17/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFHxS 9/17/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 9/17/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFOS 9/17/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFBS 9/17/2025 0.0043 µg/L 0.003 µg/L 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.