Central Iowa Water Works to study adding nitrate treatment capacity after surge that caused central Iowa lawn watering ban cost customers $1 million While the nitrate removal costs per customer aren’t significant now, treating high nitrates doesn’t address the root of the problem, warned the Des Moines Water Works CEO. For more on this story, tap the link in our bio. #WaterWorks #Iowa #iowacheck #fyp #Iowawater #nitrates #waterquality