This is a summary of recent congressional actions not reported elsewhere in The Post. SENATE

Clean Water

An Environment and Public Works subcommittee rejected the Reagan administration's proposal to phase out, over four years, grants to help states pay for sewer construction. The panel then approved, by voice vote, legislation that would authorize $2.4 billion a year in grants for fiscal 1986-88 and $1.2 billion annually for 1989-90. The administration wanted to authorize only $6 billion over the next four years, and provide no new funds after fiscal 1989. (S652; April 23) HOUSE

Wetlands Acquisition

A Merchant Marine and Fisheries subcommittee approved, by voice vote, legislation that would authorize $75 million a year over the next 10 years to protect and expand the nation's dwindling wetlands. The panel did not include a controversial provision that prevented final passage of the bill last year. That provision would have authorized funds to build jetties along the North Carolina coast to help that state's fishermen. Environmentalists contended that the jetties would damage nearby coastal areas and that construction and maintenance costs could reach $600 million over the project's 50-year term. (HR1203; April 25) Coastal Zones

Bowing slightly to pressure from the administration, a Merchant Marine and Fisheries subcommittee approved a reduced authorization for the Coastal Zone Management Act, which provides grants to states to protect their coast lines. The panel approved a measure covering six fiscal years that would reduce the annual authorization from $48 million to $40 million in 1986, then reduce that to $35 million a year by 1989. The administration wanted to abolish the 13-year-old program. The panel also did not attempt to attach legislation that would overturn a Supreme Court decision that gave state officials less control over oil and gas drilling projects off their shores. (HR2121; April 24) Ex-Im Bank Loans

A Banking, Finance and Urban Affairs subcommittee voted, 18 to 1, to retain the Export-Import Bank's direct loan program. The administration wanted to eliminate the program, which arranges loans for foreign buyers of U.S. goods, and replace it with interest-rate subsidies for private lenders. The panel set no figure for the direct loan program, which received $3.8 billion last year. The administration said its proposal, which is included in the Senate Republicans' budget compromise, would save $3.9 billion over the next three years. (HR1787; April 23) Soil Conservation

By voice vote, an Agriculture subcommittee approved legislation that would deny federal funds, such as price supports and disaster loans, to farmers who plow fragile, easily erodable land. The panel voted, 7 to 3, to exempt land on which crops have been grown in the past five years; a measure that failed to pass last year would have exempted land that had been cultivated at least once in the past 10 years. (HR2108; April 23)