Skip to main content


Why is our waterways contaminated and why can't we swim in them in some areas in summer?

The main contaminants from waterways come from three different sources Agricultural, Industrial and Urban development. All three activities produced a large range of contaminants which ultimately end up in our waterways.

What are the main contaminants of concern in our waterways?

Nitrates, Phosphates, Ammonia, E.Coli, Heavy metal and other chemical and biological contaminants.

Why are these contaminants bad for the waterways and our health?

All of the contaminants mentioned below impact the overall health of the ecology of waterways. Many aqueous species are not tolerant of different high levels of contaminants and will stop reproducing in areas with high levels of contamination.

Why is everyone talking about Nitrates in our water?

The main issue with Nitrates is that they affect the health of the ecology inside waterways and at high levels they are unsafe for humans as they have been linked to Blue babies syndrome and Colon cancer.

What does your technology do?

Basically, it removes contaminants Biologically from waterways, any aqueous environments lakes, rivers, farm Drains, Wells, Bores etc.

What is a Bioreactor?

It is an engineered system which houses a Microbiome. The Microbiome is made up of numerous different species of microbes.

How does your unit provide information about how many contaminants it removes?

We have sensors in the unit to monitor pH, temp, DO and Ammonia, Nitrates and Phosphates we extract the data and send it to a dashboard where the customer has access in real-time.

We are a community group or Runanga how can you help us?

Basically, we can organise water sampling and testing of your specific waterways, we can design a water monitoring programme which gives you real data and information. We can identify sites within your waterways that would benefit from the eClean Bioreactor water treatment. We will help with funding applications, presentations, and meetings. We can also conduct cultural monitoring which allows the local tangata whenua to provide Mātauranga Māori information which can be used to help assess the waterways and set restoration objectives and help with monitoring.

I am a Dairy farmer with high Nitrate kg/hectare, and I must reduce Nitrate leaching to water over the next few years how can you help me and how much will it cost?

We come out to your Dairy farm do water sampling and testing to understand the water quality issues and we have a chat about your nutrient budget and fertilizer application and irrigation schedule. Then we provide you with a water report and some recommendations about where we think you could install the technology, how many units you will need and how much Nitrates kg/ year the system can remove therefore reducing your nitrate leaching to water. The cost is broken up into three. One is site evaluation, water testing and recommendations which costs under $1000. Then there is the freight, the installation, and the unit. Freight is up to $2000 dependant on where you are. The installation is under $4000, and the power is dependent on your supply. The unit itself ranges from $40,000 for a small unit to $70,000 for the larger units. The final cost is the maintenance and servicing which costs around $2000. per year. In some cases, a small unit is all that is needed so you can get the full package for under $50,000 and achieve a 10% + reduction. For a large Dairy farm 1000 cows you would need two large units which would give you a 15 to 30% reduction in N/H/year.

We are a community group with a small budget but have a stream of both recreational and cultural importance could you supply us a unit and monitor the results for under $99,000?

The answer is definitely yes, and you will have money left over to use for planting, dredging, silt trap, or sensors for your waterway.

eClean Research Services

Lets Connect and Save Our Waterways