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Morrinsville Water Supply

Waterworks Road and Scott Road: 

Your water is safe to drink!

Amount of water: Consented to take up to 10,000m3/day or 10million litres.

Population: 7500 (as at 2015)

Number of samples taken: 276 samples obtained– no E.coli detected.

 

Your water comes from here:

Morrinsville Water Supply damn

Water Works Road Morrinsville  

Water Works Road:

What we achieved:

  • Part 4 of the DWSNZ (Treatment plant)
  • Part 4 of the DWSNZ (Distribution zon)
  • Part 7 of the DWSNZ (Cyanotoxin compliance)
  • Part 8 of the DWSNZ (Chemical compliance)

What we didn't achieve:

  • Part 5 of the DWSNZ (protozoa compliance, process only)

Why we didn't achieve them:

  • Monthly compliance boundaries were not met due to filters not automatically shutting down
  • The water leaving the filters was more than the specified limits of NTU (unit to measure water clarity) for more than 1% and 5% of the compliance month
  • The NTU (unit to measure clarity of the water) for the water coming out of the filters was greater than the specified limit for the duration of 3 minutes at certain times during the compliance year

How we're adressing it:

  • District wide MPDC have invested over $2M to upgrade treatment plant instruments and processes
  • Investigating why automatic shutdown features on filters was failing
  • Full alarm review has taken place improving the timeframe between when non-compliances are about to occur and when the alarms are sent to our water treatment technicians (creating faster response times 

 

Scott Road:

Scott road morrinsville

What we achieved:

  • Part 4 of the DWSNZ (Distribution zone)
  • Part 8 of the DWSNZ (Chemical compliance)
  • Part 9  of the DWSNZ (Radiological compliance)

What we didn't achieve:

  • Part 4 of the DWSNZ (treatment plant - there were not enough samples taken)
  • Part 5 of the DWSNZ (protozoa compliance process)

Why we didn't achieve them: 

  • No protozoa treatment process in place
  • The correct amount of samples were not taken at the treatment plant

 How we're addressing it:

  • Upgrading our communication network between instruments at the treatment plant and our IT systems so that data cannot go missing
  • District wide MPDC have invested over $2M to date, to upgrade treatment plant instruments and processes
  •  Improving internal processes to ensure the required number of UV manual samples are taken