PHA

PHA may stand for:

* Phoenix Hebrew Academy, a Jewish day school in north central Phoenix, Arizona
* Phytohaemagglutinin, a type of lectin found in plants, especially beans
* Polyhydroxyalkanoate, biodegradable polymers produced by bacterial fermentation of sugar or lipids
* Polyhydroxyaldehyde, a class of carbohydrate
* Potentially hazardous asteroid, an asteroid with a size and an orbit such that it could potentially strike Earth
* Process Hazard Analysis, a systematic assessment of the potential hazards associated with an industrial process.
* Public Housing Agencies, of the United States
* Pulse Height Analyzer, a nuclear electronic instrument for sorting gamma rays or charged particles into bins by energy, counting them, and saving the spectrum of pulse heights obtained for further analysis.
* Pulmonary Hypertension Association, an educational support group for suffers of pulmonary hypertension
* Sky Harbor Airport, in Phoenix, Arizona (Amtrak station code: PHA)