In this paper, the noncoherent reception performance of frequency hopping spread spectrum communication systems operated in channels with impulsive noise and selective multipath fading characteristics is investigated. For the impulsive noise, the epsilon-contaminated mixture model is used. Binary frequency shift keying modulation and noncoherent demodulation are assumed and limiter-squarer detectors or squarers are used to detect signals. The bit error rates are obtained as functions of channel and system parameters, under the multihopping and multiuser synchronous multiple access case.