CCC response to H2O complaint

Cashmere main break 22Feb2011

Ref. https://chchwater.wordpress.com/2016/01/03/roberts-household-to-ccc-30-11-15/

3 Dec, 2015

Mr Roberts

Sorry to hear about your issues with your hot water cylinder element.

As you probably know, Christchurch is lucky enough to have one of the purest and safest water sources in the world. For this reason, we are one of the few water supplies worldwide that is able to supply water untreated. We occasionally hear about reports of corrosion issues around Christchurch. However, the majority of these few reports actually to hot water cylinders with even less on coper piping. The unexplainable part is that these issues always seem to be specific to individual properties. Given that the same water is supplied to whole neighbourhoods, this leads us to suspect that these issues are much more likely to be related to individual installations or materials of construction.

1. Yes, all our wells are monitored on an annual basis and a full chemical analysis is undertaken on certain wells that draw water from certain aquifers. The water supply is sampled daily and tested for the presence of bacteria. All drinking water standards are met.

2. Yes, it will be a bit of a guess as to where the exact source of water comes from as there are multiple pump stations that feed Hackthorne Reservoir which in turn delivers water to your house. It won’t be analysis of the water at your boundary. If this is acceptable let me know and I will request the reports from our lab.

3. No, we compared lab reports pre and post earthquake and did not see any significant change to the supply. The same could be said for the annual well head sampling. To the best of my knowledge no lad reports exceeded drinking water standards.

4. Council is unable to make a contribution or reimburse for any costs incurred.

5. None, the water that is delivered is to a very high standard.

6. No, based on information we have received these are isolated cases.

Regards
Tim Drennan
Manager – Technical Services
City Water and Waste

DDI: 03 941-8372
cell: 027 824 4592
Email: timothy.drennan@ccc.govt.nz
Web: http://www.ccc.govt.nz
Christchurch City Council
Civic Offices, 53 Hereford Street, Christchurch
PO Box 73015, Christchurch, 8154

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UPDATE 19.1.16 – Council reply to CRA 14.1.16 email questions:

Hi CRA,

Council staff have discussed this issue with local residents on a number of occasions, so I therefore understand how frustrating it must be for those involved. However, the quality of the water has not changed significantly over recent years.

Mr Suckling is almost correct in his recollection of comments made by myself. The water that feeds the Cashmere area is most likely being drawn from our pumping stations on either Colombo Street, Lyttelton Street (beside Pioneer Stadium) or Thorrington Street (Ernle Clark Reserve), and this water is probably drawn from one of our deeper aquifers. The Christchurch reticulation is interconnected so it is difficult to tell exactly where the water is drawn from. The water is much the same in the Cashmere area as it is for the rest of the city. The only real difference is that on hill properties they receive their water from reservoirs. Cashmere Hill has four reservoirs – Cashmere reservoir (Dyers Pass Road, opposite Heaton Road Place), Hackthorne reservoir (beside Cashmere Kindergarten), Takahe reservoir (Reserve below Sign of the Takahe) and Victora reservoir. Cashmere reservoir is the newest of these reservoirs and is now about five years old.

If you require further information, please visit
http://www.ccc.govt.nz/services/water-supply/learning-resources/where-our-water-comes-from/

http://www.ccc.govt.nz/services/water-supply/water-supply-schemes/christchurch-city-water-supply/

The 2012 report looks typical and is what I would expect to see. The pH of 6.9 is not concerning – pH can be difficult to test accurately and a number of factors can influence this result. Best practice would suggest the sample should have been tested on-site but, if this wasn’t possible, within an hour of the sample being collected. Chlorine was added to the water supply for a short period a number of years ago, however I don’t believe this would have further contributed to any element issues.

Attached is a summary of the well head sampling undertaken at the pumping stations noted above. I should point out that Council does not sample every well annually. We sample a selection of wells across the city each year.

Regards
Tim Drennan
Manager – Technical Services
Three Waters & Waste Unit

DDI: 03 941-8372
cell: 027 824 4592
Email: timothy.drennan@ccc.govt.nz
Web: http://www.ccc.govt.nz
Christchurch City Council
Civic Offices, 53 Hereford Street, Christchurch
PO Box 73015, Christchurch, 8154

Main, Spreydon and Thorrington pump station analyses 2015-2012 p1/3
Main, Spreydon and Thorrington pump station analyses 2015-2012 p2/3

Main, Spreydon and Thorrington pump station analyses 2015-2012 p3/3
Main, Spreydon and Thorrington pump station analyses 2012-2015

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This electronic email and any files transmitted with it are intended solely for the use of the individual or entity to whom they are addressed.

The views expressed in this message are those of the individual sender and may not necessarily reflect the views of the Christchurch City Council.

If you are not the correct recipient of this email please advise the sender and delete.

Christchurch City Council
http://www.ccc.govt.nz
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UPDATE 12.7.16 – City council staff convened a meeting to discuss the HWC problem, inviting Superheat, Rheem (Peter Cocks Ltd), EQC, residents’ representatives and the local councillors. New water quality tests were promised, immediately.

UPDATE 8.9.16 – Council release current test results:
chchwater.wordpress.com/2016/09/08/ccc-to-cra-8-9-16

UPDATE 13.7.17 – Council comment on test results:
chchwater.wordpress.com/2017/07/15/ccc-email-to-cra-13-7-17

1 thought on “CCC response to H2O complaint”

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