Heat Wave in Philadelphia Brings Rise in Ozone

Towards the end of both last week and this week, Philadelphia has had two heat waves that brought temperatures to the high nineties in Fahrenheit. This caused the plants to droop, which made it necessary to water multiple times each day. In addition to drying out the plants faster and making us sweat as we worked in the garden, the heat wave also caused a spike in ozone levels.   Last Friday, ozone levels peaked at over 100 ppb, which is an unhealthy level. A good level is considered about 55 ppb at maximum. The ozone level has not peaked … Continue reading Heat Wave in Philadelphia Brings Rise in Ozone