As expected, the quality of our waterways is very good. Please click the links below to read the reports:
The following is a summary of how our state of the art irrigation filtration system works; our water sample results; and the barriers to weed control at CVE:
CVE Irrigation Filtration
Each irrigation pumping station has two levels of filtration protection from debris entering the irrigation system.
1. The first is a prefilter, Self Cleaning two dimensional Screen assembly located in the water reservoir. This filter removes 65% of debris larger than a pin head to assist the large pump station filter assembly to work efficiently.
2. The second filter is a self cleaning three dimensional filter assembly sending clean lake water to the irrigation system to substantially reduce sprinkler nozzle clogging. This filter removes 94% of debris larger than a small pin point to keep the tens of thousands of sprinkler heads from clogging.
We have further been assured that we WILL NOT experience an increase of clogging of sprinkler heads from any amount of algae present in our waterways.
Water Quality Test Results
Blue-Green Alga is naturally occurring in most waterways and is present in ours here at CVE, however the levels present are considered normal and non-toxic. The good news is that there was NO blue-green alga present in the water sample collected directly from the irrigation head! Our self-cleaning filter system is working!
Master Management has engaged in some further toxicity testing and will release those results upon receipt, however all of the analysis to date indicate that our waterways are safe to use for irrigation.
Temperatures across the nation are at a record high and the lack of rain has made waterway weed control very challenging this summer. In addition, there are several reasons that our community suffers more than others. The flow of the C2 canal entering CVE at Hillsboro keeps the weed control treatment moving and quickly dilutes the herbicide and its effectiveness. Conversely, in certain waterways there is no flow, which will cause the decomposing weeds to just sit on the surface on the water, like sludge, especially with no rain.
If we were to treat the water with a higher concentration of herbicide, we would have to suspend irrigation for several days per week as the water coming from the canals would be harmful to the landscaping. Currently, there are times we have to suspend irrigation to accommodate waterway treatment, additional days of not irrigating would have a very bad effect on the landscape.
Skimming the decomposing weeds off the surface of the water as some have suggested, is not recommended by any of the experts we have consulted as it also removes the herbicide and weed growth would just be worse. Others have suggested weed eating fish, such as Carp, but they don’t eat the type of weeds we have in our waterways and wouldn’t be effective.
Some additional treatment has been added as recommended by our vendor and it seems to be helping, however slowly. We will continue to search for a remedy, however haven’t been able to find a quick solution given the many issues that contribute to this problem. The weeds will disspate with rain and cooler temperatures.
We thank you for your continued patience and understanding.