HMCharacteristicValueAirQuality.poor The air quality is poor. Declarationcase poor See AlsoAir QualityHMCharacteristicValueAirQuality.unknownHMCharacteristicValueAirQuality.excellentHMCharacteristicValueAirQuality.goodHMCharacteristicValueAirQuality.fairHMCharacteristicValueAirQuality.inferior