Strictly check the water quality to ensure drinking safe water.

A small drop of water highlights people’s livelihood. In order to systematically grasp and analyze the drinking water situation of residents in the whole region and ensure the safety of drinking water for residents, recently, the water quality testing personnel of Jining District Municipal Public Utilities Service Center carried out water quality testing and sampling work for urban drinking water to ensure the safety of drinking water for residents.

First, make overall arrangements and make preparations for actual testing. According to the tasks and requirements of sampling inspection, make a detailed sampling plan, define the sampling points, sampling time and times, testing items and sampling quantity, determine the selection and cleaning of sampling equipment, sampling quality assurance measures, etc., and arrange sampling trucks for sampling personnel.

The second is scientific sampling to improve the quality of sample collection. Collect and save water samples correctly in strict accordance with the operation flow of drinking water sample collection, mark the water samples on site, and fill in the sampling records to ensure that no safety accidents occur during the sampling process and ensure the quality of sample collection. This time, the testing staff did all the tests on the peripheral water of seven pipe networks, three daily tests on the factory water of six water plants, and seven tests on the water of two pipe networks.

The third is to strictly standardize testing to ensure the quality of testing. After water samples are collected, the central inspection personnel will conduct inspection in strict accordance with the Standard Inspection Method for Drinking Water (GB/T5750-2023) and related specifications. The main inspection items include: routine indicators such as chromaticity, turbidity, pH value, permanganate index (calculated by O2), total hardness, total coliform bacteria and total colonies. During the inspection, the samples will be retested and parallel.

This sampling and testing of drinking water provides reliable data support for the safety management of drinking water in urban areas, and also better ensures that people can use safe water, safe water and satisfactory water. In the next step, the center will continue to do a good job in water quality testing to protect the people from eating "safe water, safe water and happy water".