In order for a public water supply to provide a safe, clean, adequate supply of water to the consumer, it must be properly constructed, operated and maintained. However, proper construction, operation and maintenance alone cannot document the safety or quality of the water. To develop and maintain a record of water quality, it is necessary to collect representative samples of the water and have them analyzed by a certified laboratory on a routine basis. Sampling, combined with proper operation, operational testing and record keeping with periodic facility inspection, is an effective means of documenting the safety and quality of the water reaching the consumer.
It is critical that each sample collector carefully read the sample collection requirements specified in each approved drinking water test method. Sampling location and sampling technique vary and failure to follow the proper procedures may result in re-sampling or violations.
We are pleased to publish this Sample Collector’s Handbook. This handbook will assist public water supplies in implementing the requirements of the Illinois Environmental Protection Agency’s drinking water regulations.
We intend to update the Handbook periodically as the United States Environmental Protection Agency (USEPA) and subsequently the Illinois Pollution Control Board promulgates and the Illinois EPA publishes new and revised drinking water regulations. Each public water supply must be aware of these changes and make any necessary modifications to its sample collection procedures.