Shoulda-coulda-woulda-didn’t-damn: What choices does
New Zealand have to make its drinking water safe in the wake of the Havelock North enquiry – and will the changes we make lead to safer drinking water?
Dr. Alistair Humphrey – Epidemiologist Medical Officer of Health, Canterbury, NZ
Dr. Jones has presented evidence on several occasions to the Government Inquiry into Havelock North Drinking Water and will comment on local implications of the inquiry’s preliminary findings and recommenations to date.
Catchment microbial dynamics is an emerging discipline driven by the demands of catchment scale legislation designed to deliver good water quality and ecosystems. The driver in the EU is the Water framework Directive and its daughter directives which have many parallels in the earlier Clean Water Act in the USA.
The Drinking Water NES provides the first stage of a multiple barrier approach to drinking water management in New Zealand by setting requirements for protecting sources of human drinking water from becoming contaminated.
Water Safety Plans, part of the ‘Framework for Safe Drinking-Water”, emerged from a ten-year WHO process that began in 1994. They turned around the then-dominant focus on ever faster and more specific testing and on treatment-focused actions to secure quality.
This presentation will provide an overview of the Havelock North drinking-water supply, its vulnerabilities and how the supply water safety plan considered with them. Proposed changes to the way water safety plans are prepared in New Zealand will then be discussed.
The evidence for this analysis is based on a review of international experience relevant to the provision of safe drinking water in New Zealand. The evidence includes 38 outbreaks of serious drinking waterborne disease occurring in 13 affluent countries (9 in the USA, 7 in Canada, 6 in England, 3 in Finland, 2 each in Denmark, Norway, Sweden, Switzerland and 1 each in Australia, Ireland, Japan, New Zealand, and Scotland).
This presentation will set the scene for the rest of the workshop by providing a high level summary of the events that unfolded at the time and of the findings of the subsequent government inquiry in relation to the cause of the outbreak.
In this paper we look at the likely environmental effects of climate change in two contrasting regions of New Zealand, how these will affect aquatic ecology and the implications for stormwater management.
The paper will conclude with a review of the lessons drawn from the approach, the actual construction of the culverts and recommendations for future research to better understand the pipe-soil structure interaction in an induced trench installation.
This paper will outline the strategies and principles to be undertaken by council and other as-built receiving organisations in order to update their internal as-built submittal processes and begin considering bulk-processing as-built documents.
This paper describes the considerations for developing a new bar screen design (and rearrangement of the silt well) to maximise hydraulic efficiency, reduce risks of blockage, improve accessibility for operations staff, and reduce health and safety risks associated with working at heights above water, during severe weather.
This paper outlines: the monitoring methodology; a summary of the water quality results obtained; and answers if there are benefits for requiring enhanced stormwater treatment for service station non-forecourt stormwater discharges?