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Access a legend for the map below
Source of Map: Water Resources Inventory of CT, Part 4, Southwestern Coastal River Basins,
by the U. S. Geological Survey and the CT Department of Environmental Protection, 1970.

THIS IS AN EARLY (1970) GENERALIZED MAP OF ESTIMATED AQUIFER BOUNDARIES ONLY;
COMPARE IT TO LATER DATE USGS SURFICIAL MATERIALS MAP

HISTORIC BASE LINE DATA: 1980 HVCEO
REPORT ON LITTLE POND AQUIFER
Comprising about 0.6 square mile at the south side of the Routes 35 and 7 intersection in Ridgefield, this small area is predominantly zoned and developed for light industrial and commercial use.

Because of on-site sewage disposal problems, the Town has recently taken steps to acquire a small sewage treatment plant owned by the Benrus Corporation, and will extend a short public sewer north and south along the aquifer area.

Principal land use problems here are the existing commercial and industrial uses, the sewage treatment plant, permitted industrial discharges by the Benrus Corporation, and the site of a former State of Connecticut salt stockpile.

No information is available (from USGS logs of 3 test wells) which suggests the existence of any groundwater quality problems. Ground conditions (coarse-textured) and bedrock contact lines however suggest this location may be a bedrock aquifer recharge area. Potential is probably limited to a source of supply for local neighborhood, provided suitable land use controls are adopted.

EXCERPT ON THE LITTLE POND AQUIFER
FROM A 1995 RIDGEFIELD PZC CONSULTANT’S STUDY
There are three USGS test holes drilled in the aquifer and two well completion reports are on file at the Ridgefield Health Department. Several supply and monitor wells have been drilled at the Perkin-Elmer facility. The supply wells are not registered with the CT DEP.

The logs indicate that the stratified drift is up to 80 feet thick. The USGS test holes and well completion reports indicate the aquifer is composed of medium to very coarse sand overlying fine to medium sand. However, at the Perkin-Elmer facility, testing by Geraghty & Miller in the 1960's found the formation to be fine grained and not being capable of supplying large amounts of water.

The supply wells at the facility are completed in bedrock. The areal extent of the aquifer is about 0.2 square miles. A discontinuous till layer separates the aquifer from the underlying bedrock.

Solvent contamination has been detected at the Perkin-Elmer facility in overburden and bedrock. Analyses for major ionic constituents are on file at the Health Department. In addition, LBG's search of the CT DEP's records revealed past leaks in two underground storage tanks and the presence of sludge lagoons containing metal hydroxide overlying the aquifer at the Perkin-Elmer facility.

The 7 day, 10 year low flow was estimated between 0.5 and 0.6 million gallons per day and the average low flow was estimated to be about 1.5 million gallons per day from a total watershed area of about 5.0 square miles.

Although the aquifer may be capable of yielding limited quantities of water to wells, the contamination problems or risks reduce the current feasibility for developing potable water supplies.