We are replacing the Culligan water softener we've had for the past 25+ years. We should probably have done this years ago but it really has seemed to be working until recently - not very efficiently, I'm sure

Our Public Water District sends us an annual report from the testing they have a certified lab do each year. The water source is groundwater and some of the 2013 test results are as follow:

Hardness: 273 - 308 ppm
pH: 7.3 - 7.4
Iron: 8.6 - 48.5 ppb (or 0.0086 - 0.0485 ppm)
Manganese: 1.89 - 4.86 ppb
TDS: 430 - 537 ppm
Chloride: 14.6 - 76.5 ppm
Copper: 10.5 - 268 ppb
Bacteria: None detected

They did not report any test results for sulfides, arsenic, or nitrates.

We have 2 bathrooms and there are only 2 of us in our household. We rarely, if ever, take showers at the same time. In fact, the shower in the second bathroom is rarely used. The Culligan softener is on a 3/4-inch line. A local plumbing supply company is a dealer for Water-Right softeners, which we're considering in place of another Culligan.

Thanks to anyone who can help us size the softener we need in advance of a dealer offering their advice on what we should buy!