An Investigation on A Case of Acute Toxicity Caused by the Pollution of Water Strainer by Nitrite

Objective To investigate the cause of a case of toxicity due to the pollution of water strainer by nitrite.Methods Epidemiological techniques were used to examine the environmental sanitation and water quality.Results The manufacturer involved in this accident was found to use a large amount of nitrite and water.There was a well designated for the industrial use,and the concentration of nitrite in the supplied water was found to exceed the safety limit.The well was also found to have water pipes connecting to the municipal water supplying network.19 people were found to have nitrite intoxication,and the accident was due to the pollution of drinking tap water by the high nitrite well water.Conclusion The factory violated the required guidelines by connecting the well water supply with the municipal water supplying network without permission.The factory also failed to regulate check the drinking water quality.