Here are the local agencies and the average levels of Chromium-6 detected, according to the study:

United Water NJ: Samples taken: 12, detects: 12, range: 0.034-0.33 ppb, average: 0.15 ppb
Ridgewood Water: Samples taken: 56, detects: 56, range: 0.14-2.9 ppb, average: 0.40 ppb
Fair Lawn Water Department: Samples taken: 20, detects: 18, range: 0.0-0.93. ppb, average: 0.28 ppb
Garfield Water Department: Samples taken: 12, detects: 12, range: 0.033-3.8 ppb, average: 0.70 ppb
Mahwah Water Department: Samples taken: 15, detects: 14, range: 0.0-0.37 ppb, average: 0.21 ppb
Passaic Valley Water Commission, Lodi Water Department: Samples taken: 8, detects: 8, range: 0.038-0.098 ppb, average: 0.064 ppb
Lyndhurst Water Department: Samples taken: 8, detects: 6, range: 0.0-0.068 ppb, average: 0.039 ppb
Elmwood Park Water Department: Samples taken: 8, detects: 7, range: 0.0-0.12 ppb, average: 0.063 ppb
Ramsey Water Department: Samples taken: 18, detects: 18, range: 0.044-1.8 ppb, average: 0.62 ppb