Monitoring results are nearing the performance goal exceedance from results collected May 12. Memorial Day weekend typically marks the peak usage for thiobencarb, and subsequently the highest monitoring results.
With favorable weather forecast, there should not be issues with maintaining the waterholding requirements and managing drift over the drains.
All monitoring results have been excellent with the upper Colusa Basin Drain site at the performance goal of 1.5 µg/L on May 12.
Sampling and submission are required
Nitrate (NO3) in soil can often be found in rural and agricultural areas due to fertilizer, livestock waste, and septic systems. Nitrate can be highly mobile in soil and can readily leach to groundwater. According to the US Environmental Protection Agency, when present in groundwater, nitrate can cause serious health effects if consumed.
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Required by DPR to complete for thiobencarb applications
The website for the online mandatory thiobencarb stewardship training is active and available through the CalRiceNews link here: CalRiceNews.org
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Monitoring for 2025 is complete.
The 2025 surface and groundwater monitoring under the RPP and WDR programs was completed by August.
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