The measurements shown below were made at USGS
station 01209710, located on the Norwalk River
near the Perry Avenue bridge. All of the
measurements are in micrograms per liter, as Al.
For details about the data, press here.|
The highest reading, 24, occurred in 6/97, and the lowest, 3.0, in 6/93. All of the readings above 23 (7 percent of the samples), are shown in red and all that are below 3.0 (another 7 percent), are in blue.
Season and by
(Overall = 10.5)