We recently made some repairs to our well. The pump gave out and was replaced and the 6.25" steel casing was sleeved with a 4" PVC pipe to attempt to reduce the amount of sediment and iron in the water. We were told by the health department that we would need to shock chlorinate the well after the repairs to destroy any bacteria. Since there were no bacteria present prior to the repairs, we didn't think we needed to do this.
We just got our water test results back and, sure enough, there is coliform bacteria present in the water now (although fortunately no E. coli). We have been reading a lot about shock chlorination and the instructions vary from site to site, with the chlorine to sit in the system for anywhere from 12 to 48 hours. My first question is:
1) Is there any harm in leaving the chlorine in the system for 1 week while we are on vacation and then flushing it when we return? Is 12 hours really long enough for this type of treatment?
The other question I have relates to water treatment systems. Based on our recent water test, our water is as follows (values above recommended limits are starred):
Harness: 220* pH: 7.1 Iron: 0.26 mg/l (the PVC sleeving process cut this in half from a prior reading of 0.47 mg/l) Manganese: 0.26* mg/l Sodium: 14 mg/l Calcium: 74 mg/l Chloride: 11 mg/l Sulfate: 11 mg/l Small amounts of lead, copper, zinc and toluene (far below the hazardous limits)
The system I am thinking of using is the Puritec MC Series Complete because I like the idea that it can soften water without the use of salt and is pretty much maintenance free. http://www.puritec.com/store/moreinfo.cfm?Product_ID%8
No contractors we have talked to have ever heard of these Puritec systems and there is almost no data on how effective they are. My other questions are:
2) Is the Puritec MC Series Complete a reputable brand?
3) Does anyone have any suggestions for treatment systems based on the above water test results?