The Wastewater Treatment Plant was built in 1939 to 1940. It was placed in operation on January 1, 1940 with a design capacity of 864,000 gallons per day. Bryan's population was 5,404 in 1940. The total flow in 1940 was 255,500,000 gallons, with an overall 94% removal of BOD, and 95% removal of suspended solids.

In 1960 plans were completed to more than double the capacity of the treatment plant, to 1.913 MGD. In September 1962 the plant was completed and in 1963, 290,168,000 gallons of flow was treated, with an overall 91% removal of BOD and 96% of suspended solids removal. In 1963 Bryan's population was 7.631. This expansion was anticipated to satisfy the needs of the city until 1980.

In 1970 the plant treated 516,874,000 gallons of raw sewage with an estimated 15,354,000 gallons of raw sewage by-passed with no treatment and 27,278,000 by-passed after primary treatment. It became apparent that the plant needed more treatment facilities. The population in 1970 was 7008 people. In 1971 these improvemnts were completed.

In 1974 phosphorous removal was added.

In 1984 the Ohio EPA approved an industrial pretreatment program for the treatment of industrial waste.

In 1988 improvements were completed to expand the design flow to 3.100 MGD. The total flow treated in 1989 was 730,716,000 gallons, with 97% removal of suspended solids and 99% removal of BOD. In 1990 the population was 8348.

In the year 2000, 873,577,000 gallons of raw sewage was treated with a 98% removal of suspended solids and a 98.8 removal of BOD.

Digested Sludge was dryed in dying beds up until 1975, when a sludge truck was purchased and liquid sludge was applied to farm fields and city owned farm land.The sludge we haul today is a class B sludge and is plowed into the ground. Plans are being developed to reduce the liquid sludge to a class A 90% dry solids product.

The Wastewater Treatment Plant is a NOAA cooperative weather station where rain fall and temperatures are recorded. We have been doing this for over 60 years