Using the supply to a pumping station may not be suitable, firstly it depends upon network capacity available at the supply point to the pumping station, then you have to look at the rated capacity of the cable, then there is the fact that a pump is what is called a disturbing load, on startup the pump may momentarily drop the supply voltage near the legal voltage limit, which may not allow for a charging point.
this is the sort of thing the designers I work with are looking at day in day out, and is the biggest problem we face, also bear in mind that to lay a service cable can cost in excess of £40 per metre, by the time you have factored in the civils costs and costs for the cable.