The noise emissions from a compressor station, part of a wastewater treatment plant, were investigated. The noise was a source of annoyance to a nearby residential subdivision. Initial measurements made on the site revealed salient tonal components. Further measurements suggested that the two main sources were leakage around the pipe intakes, and flow noise from the exhaust mufflers. Modifications were made to both sources in order to mitigate the problem. The leaks were sealed using dense caulking materials, and spoilers were inserted in the mufflers. The impact of these noise control solutions was measured, and the benefits to the surrounding community were assessed.