According to the indoor air quality standards, the newly-built and newly-renovated kindergartens, office buildings, family rooms and other 180 households with nearly 30,000 square meters of buildings were investigated and monitored. The test results show that the qualified rate of indoor air quality is only 34.7%.
Among them, ammonia pollution is the most serious in unqualified indoor air, with the over-standard rate of 56.9%, and the highest measured value exceeds the national control standard by 62.8 times, with an average over-standard of 36.5 times; The over-standard rate of formaldehyde is 27.8%, and benzene series (toluene, xylene, etc.). ) is 14.6%.
Extended data:
The requirements of indoor environmental testing can be roughly summarized into five aspects.
1, representativeness: sampling time, sampling place and sampling method must comply with relevant regulations, so that the collected samples can reflect the real situation of the whole.
2. Integrity: It is mainly emphasized that the implementation of the testing plan should be complete, that is, the number of samples and the integrity, systematicness and continuity of the measured data must be guaranteed as planned.
3. Comparability: It is required that the determination results of the same sample are comparable between laboratories or in the same laboratory.
4. Accuracy: The measured value conforms to the true value standard.
5. Precision: The measured value has good repeatability and reproducibility.
Reference source: Baidu Encyclopedia-Indoor Environment Detection
Reference source: Baidu Encyclopedia-indoor air testing