The Olean Well Field is within both the Town and City of Olean, Cattaraugus County, New York. Several suspected sources of contamination have been identified. Olean now gets its drinking water from a nearby well field and from surface water, which must be treated in an aging filtration plant.
Private wells continue to draw water from the contaminated aquifer.
The county maintains and operates the filters. The description may change as additional information is gathered on the sources and extent of contamination.