Better Operation for Iowa Sewage- Treatment Plants, February 10, 1926.

There are at the present time approximately two hundred municipal sewage-treatment plants in Iowa. Judging from the results of the recent survey of twenty-six counties, it is safe to say that one half of these plants are laboring under difficulties brought about by in incompetent operation. There is a movement throughout the state to compel cities now dis- charging sewage into rivers to install sewage treatment plants. It is indeed important to install treatment plants where they are really necessary, but it is just as important to operate properly the ones that have already been installed