Análise de águas subterrâneas de municípios do estado do Ceará

Abstract

Groundwater is fundamental for the state of Ceará, which, due to irregular rainfall, has as an alternative the construction of wells. However, these waters can be polluted by human actions, such as the irregular use of pesticides or even the irregular dumping of sewage. Due to the different chemical species present in the waters, such as nitrates, nitrites and phosphorus, the environment becomes favorable to eutrophication, which generates the contamination of these waters. Thus, the present work aims to evaluate the chemical composition of groundwater samples located in three municipalities in the state of Ceará, in the period of the second half of 2021, as well as to evaluate the quality of water in accordance with current legislation. Thus, the following parameters were selected for analysis: pH at 25 ºC, conductivity, color, turbidity, chlorophyll a, total phosphorus, nitrate and nitrite. The results obtained were compared with the potability standards recommended by edict 888/21 of the Ministry of Health, and revealed that 86.66% of the analyzed samples did not meet the potability standard. The parameters that were in disagreement were: color (33.33%), turbidity (13.33%), chlorophyll a (26.66%) and nitrate (73.33%). In view of the results obtained, it is necessary to carry out the monitoring and correct treatment of these waters so that the standards determined by the legislation are accepted, aiming at the potability of water and public health.