BandA wrote: ↑Sun Jan 09, 2022 8:51 pm
Gilbert B Norman wrote: ↑Sat Jan 08, 2022 7:50 am
Regarding the Reservoir; what would have happened "back in my day", i.e. 70 years ago, when riding the Camp Special (Pullmans added to the State of Maine) up to Meredith NH, if I, or one of my "camper colleagues", had to "take a tinkle" while passing through this watershed?
Riding same in line space to Portland, circa '59, I do not recall the Porter saying not to use the "facility" in a 14-4 "--Point" until, say, a half hour after leaving Worcester.
Unlike most surface reservoirs, MWRA water is not filtered at all. So sunlight & dilution are the only protections against giardia & cryptosporidium, which I don't think were endemic before the 1980s. A little urea ain't enough to cause an algae bloom, though it's bad form to tinkle directly into the drinking water. Human feces should at least be buried so that animals can't eat it, and probably at least 50 feet from bodies of water & above the water table. Rail trails or hiking trails pose a much greater risk of organic pollution than railroads do!
The MWRA has a large water treatment plant down the line in Marlborough (within sight of CSXT's Fitchburg Running Track) which treats the water for the downstream, customers:
https://www.mwra.com/04water/html/carrollwtp.html
Since 2005, the Carroll Water Treatment Plant has used ozone as a primary disinfectant. Ozone provides better disinfection than chlorine alone. It also reduces the amount of potentially harmful disinfection by-products. Since the plant has been on-line, it has exceeded current regulatory requirements for inactivation of Giardia, provided
Cryptosporidium inactivation in advance of future regulations and reduced the formation of disinfection by-products.
In April 2014, ultraviolet ("UV") light treatment was added. UV enables MWRA to inactivate the most difficult to kill pathogens. UV light damages the DNA of bacteria, viruses and other pathogens, making it a strong disinfectant.