Table 5 Assessments of bacterial indoor air quality in the selected eight public Primary schools in Gondar city, according to the sanitary standards for non-industrial premises (n = 51)
Bacterial | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Sampling time | 6:30–7:30 am | 5:00–6:00 pm | |||||||||
Range of values (CFU/m3) | < 50 | 50–100 | 100–500 | 500–2000 | > 2000 | < 50 | 50–100 | 100–500 | 500–2000 | > 2000 | |
Degree of Air Pollution | Very low | Low | Intermediate | High | Very high | Very low | Low | Intermediate | High | Very high | |
School | School 1 | – | – | – | √ | – | – | – | – | √ | – |
School 2 | – | – | – | √ | – | – | – | – | – | √ | |
School 3 | – | – | √ | – | – | – | – | – | √ | – | |
School 4 | – | – | – | – | √ | – | – | – | – | √ | |
School 5 | – | – | – | – | √ | – | – | – | – | √ | |
School 6 | – | – | – | – | √ | – | – | – | √ | – | |
School 7 | – | – | – | √ | – | – | – | – | – | √ | |
School 8 | – | – | – | – | √ | – | – | – | – | √ | |