The New Haven line has the lowest approval ratings among Metro-North's three railroads, according to results of a newly released customer satisfaction survey.

Riders surveyed said they are dissatisfied with onboard condition of trains, including the availability of seats and condition of rest rooms onboard the state's aging fleet.

The results of the survey were garnered in June, when the railroad distributed more than 7,000 forms on 75 trains.

New Haven line customers answering the 58-question survey gave the service an overall approval rating of 88 percent, compared with a 97 percent satisfaction rate for riders of the Harlem line, and 96 percent for Hudson line passengers, according to the survey.

New Haven line riders were 64 percent satisfied with the availability of seats, and 37 percent satisfied with the cleanliness and physical conditions of restrooms, according to the survey.

The survey results are the first since the Metro-North suspended the annual customer satisfaction questionnaire, after the Metropolitan Transportation Authority decided to create a format that would apply the same rating scale to Metro-North and Long Island Railroad.