For removal of cryptosporidium what is EPA regulations?

Question

As of January 1, 2002, EPA’s surface water treatment rules require systems using surface water or groundwater under the direct influence of surface water to remove or deactivate 99% of Cryptosporidium. For systems serving fewer than 10,000 customers, when does this rule take effect?

Answer 1

Water suppliers are currently not required by federal or state regulations to monitor for Cryptosporidium. Several of the over 30 surface water suppliers in Nevada monitor for Cryptosporidium oocysts. More often than not, Cryptosporidium is not found in the water supply or the treated water. Some of these water systems have infrequently found low levels of the organism in their water supply and a few systems have found even lower levels in their treated water. The levels detected to date most likely do not represent a threat to healthy individuals.

Answer 2

The new rule is to monitor only at first.  From the EPA website.

"Monitoring starting dates are staggered by system size. The largest systems (serving at least 100,000 people) will begin monitoring in October 2006 and the smallest systems (serving fewer than 10,000 people) will not begin monitoring until October 2008. After completing monitoring and determining their treatment bin, systems generally have three years to comply with any additional treatment requirements. Systems must conduct a second round of monitoring six years after completing the initial round to determine if source water conditions have changed significantly. "