Columbia Water Co. plant

This is the newly expanded Columbia Water Co. water-treatment plant.

Columbia Water Company will see a revenue increase of 12.4 percent under rate hikes approved Thursday by the Pennsylvania Public Utility Commission.

That’s about two-thirds of the 17.8 percent increase the company requested.

In its decision, the PUC also prohibited the company from seeking a further general increase for at least 33 months.

The PUC estimated impact on residential customers who use 3,000 gallons a month will be as follows:

In its Columbia rate district, the average bill will rise 8.6 percent, from $36.66 a month to $39.81, for an increase of $37.80 a year. In its Marietta rate district, the average bill will rise 20.6 percent, from $23.33 to $28.14 a month, for an increase of $57.72 a year.

The PUC said average monthly bills would have risen to $39.50 in both districts under the company’s request.

Columbia Water serves approximately 10,223 customers in the townships of West Hempfield, Rapho, East Donegal and Manor and the boroughs of Columbia, Mountville and Marietta, as well as Hellam Township in York County.

Comment from Columbia Water wasn’t immediately available Thursday.

Previously, the company said it wanted to recover the cost of improving its system and providing service, and noted that it last raised rates in 2013 for Columbia division customers and in 2005 for Marietta division customers.

The PUC decision followed two public hearings in September, at which regulators said six customers testified.

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