[Effects of Cr+6-polluted-well-water on inhabitant's health]

The increase of Cr+6 in well water results from pollution by electroplating waste water. The average content of Cr+6 in water of the wells in the polluted area is as high as 1.68 mumols/L, obviously higher than that in the control area (P less than 0.05). The health condition of inhabitants is poor in the polluted area, with a higher incidence of such symptoms as dizziness, weariness, poor appetite, abdominal pain and dermatitis. The blood pressure of the inhabitants in the polluted area is generally lower than that of those in the control area. The chromium content in the urine of 36 cases in the polluted area is 0.12 mumols/L, which is much higher than that in the control area (P less than 0.05). This investigation indicates that long-term drinking of high-chromium content water is harmful to people's health.