Any subsequent change in the area of the union also changed the sanitary district.

A number of urban sanitary districts lay in more than one county.

Rural sanitary districts were formed in all areas without a town government.

This fueled even more growth, as the sanitary district continued to expand.

West Bridgford was created as an urban sanitary district in 1891.

The town was created as a sanitary district (sukhaphiban) in 1956.

In 1875 the county was divided into urban and rural sanitary districts.

It was created in 1894 from Louth rural sanitary district.

At the time of abolition in 1894, there were 572 rural sanitary districts.

The remainder of the country was divided into rural sanitary districts.