Hi David,
One more approach -
Planning for Water Safety and Quality.pdf 597.43KB
325 downloads
(esp see pg 9/15 and table 2 at end)
it depends on the set-up of course but one interpretation of above is to develop a plan via sampling/evaluating the acceptability of filtered/chlorinated main input for detailed quality/safety parameters/chlorination level and all sub-divisions from main input into different areas to further confirm uniform chlorination and within acceptable ppm range. This depends on appropriate filtering/balanced flow distribution design/ relative pipe sizes.
Then rotate the various points on the sub-divisions using a monthly sampling plan with some "risk-based" prioritisation to RTE / non-RTE areas.