Cyanide in Connecticut Drinking Water
148 public water systems in Connecticut have historical EPA violation records associated with cyanide in the Q2 2026 snapshot.
221
Historical Records in Connecticut
148
Systems With Records
About Cyanide
- EPA Limit
- 200 ppb
- Category
- Inorganic
- Health Effects
- Nerve damage, thyroid problems
- Common Treatment Approaches
- Reverse osmosis, ion exchange
Connecticut Systems With the Most Cyanide Records
Havasupai Village
885 served5 historical records
D
Pit River Montgomery Creek Rancheria
90 served4 historical records
C
Polacca
3,890 served3 historical records
F
Yurok - Kepel
76 served3 historical records
D
Yurok - Wautec
96 served3 historical records
D
Yurok - Weitchpec
120 served3 historical records
D
Kaibab Village
407 served3 historical records
C
Dishchii Bikoh Community School - BIA Charter
622 served3 historical records
C
Viejas Community System
9,600 served3 historical records
B
Yomba Indian Reservation
30 served3 historical records
D
Grindstone Rancheria
150 served3 historical records
F
Cocopah East
280 served3 historical records
C
Walker River Paiute Tribe
662 served3 historical records
D
Moccasin Domestic Water Improvement District
96 served3 historical records
C
SCUA Lower Peridot
702 served3 historical records
F
SCUA Upper Peridot
275 served3 historical records
D
WMATUA Miner Flat
15,570 served3 historical records
F
Lower Moencopi - Spring Source
465 served2 historical records
D
Chemehuevi Water
2,200 served2 historical records
C
Washoe Tribe Woodfords
250 served2 historical records
B
These counts describe historical compliance records, not present concentrations or household test results. Confirm current conditions with the utility's latest Consumer Confidence Report.