Rules Governing Our Operation
Under the federal Surface Water Treatment Rule, surface supplies such as that used by the City of New York require filtration unless certain rigid requirements can be met.  New York City's filtration avoidance of its Catskill-Delaware supply was renewed in November 2002.  This filtration avoidance is ongoing and is anticipated to remain in effect into the future.  This filtration avoidance applies to the Shaft 22 Aqueduct connection.

Despite the fact that the WJWW considers that it meets all filtration avoidance criteria at Rye Lake, New York State initiated an enforcement action against the WJWW in September, 1999 which requires the WJWW to build a filtration plant for the Rye Lake supply.  Construction is expected to begin in 2009, and the plant should be in service in 2011.  This plant will also treat the water for West Harrison.