B737 flight crew reported flight attendants complained of toxic smell in aft galley.

Attributes
ACN	1503314
Time
Date	201712
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Light	Dawn
Aircraft 1
Make Model Name	B737-700
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Flight Plan	IFR
Component
Aircraft Component	Galley Furnishing
Person 1
Function	Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 273
Person 2
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 242
Events
Anomaly	Aircraft Equipment Problem Less Severe Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor

Narrative:

Flight attendants reported toxic fumes coming from coffee pot area of aft galley. They thought it was initially not that bad but when they described the smell as toxic and that all three flight attendant's had headaches we immediately decided to divert. Initially we diverted to ZZZ but after turning north determined that ZZZ1 was closer. We informed dispatch of divert and [advised] ATC. We ran the qrc and QRH for fumes in cockpit/cabin. One major problem was captain's O2 mask microphone would not work making communication extremely difficult. I finally took my mask off and the first officer remained on O2 until we landed. I made a PA to the passengers informing them of the diversion due to an unusual odor being detected. After landing I called flight attendants and asked if we needed to egress on taxiway or if they thought we could continue to gate. They responded that the gate would be fine. After arrival at the gate I went to the aft galley to assess the situation I could not detect any abnormal odors. I made an announcement to the passengers and we deplaned them. None of the passengers appeared upset or showed any sign of distress.

Original NASA ASRS Text

Title: B737 flight crew reported Flight Attendants complained of toxic smell in aft galley.

Narrative: Flight Attendants reported toxic fumes coming from coffee pot area of aft galley. They thought it was initially not that bad but when they described the smell as toxic and that all three FA's had headaches we immediately decided to divert. Initially we diverted to ZZZ but after turning north determined that ZZZ1 was closer. We informed Dispatch of divert and [advised] ATC. We ran The QRC and QRH for fumes in cockpit/cabin. One major problem was Captain's O2 mask MIC would not work making communication extremely difficult. I finally took my mask off and the FO remained on O2 until we landed. I made a PA to the Passengers informing them of the diversion due to an unusual odor being detected. After landing I called Flight Attendants and asked if we needed to egress on taxiway or if they thought we could continue to gate. They responded that the gate would be fine. After arrival at the gate I went to the aft galley to assess the situation I could not detect any abnormal odors. I made an announcement to the Passengers and we deplaned them. None of the Passengers appeared upset or showed any sign of distress.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.