Water Quality

Thiobencarb Monitoring under the Rice Pesticide Program

Thiobencarb Monitoring under the Rice Pesticide Program

Thiobencarb (Bolero/Abolish/League MVP) monitoring began at the Colusa Basin Drain (CBD5) on April 26 folding in all sites on May 1. Monitoring frequency began at once per week, increasing to twice per week before the Memorial Day Holiday weekend.

The lab reporting limit is 0.5 parts per billion (ppb), and the city intake results are below 0.2 ppb per the lab method used. The results were below the 1.5 ppb performance goal through May 24. Only one result was above the performance goal at 1.7 ppb on May 29, recovering to 1.3 ppb on May 31.

We are posting the results through the CRC e-communication to increase transparency and in response to a higher volume of requests for the information. 

Download 2018 RPP Monitoring Results as a PDF

More Water Quality Stories

Thiobencarb Monitoring and Changes to REI

Thiobencarb Monitoring and Changes to REI

Monitoring for 2019

Thiobencarb monitoring starts at the Colusa Basin Drain 5 (CBD5) on Tuesday – the typical start date of water quality monitoring. The CBD5 site is off Highway 20 in Colusa County, and receives drainage from both Colusa and Glenn Counties. The Colusa County Agricultural Commissioner’s office announced receipt of the first thiobencarb notice of intent (NOI) with applications under way. Confirmation of intent to apply thiobencarb from the other rice counties will trigger the decision to add in the remaining monitoring sites. We estimate this will happen as early as May 7.

READ MORE
Thiobencarb holiday monitoring schedule

Thiobencarb holiday monitoring schedule

Monitoring is underway for the thiobencarb use season. We start doubling up the monitoring this week in advance of the Memorial Day holiday weekend. The increase in the monitoring schedule will continue through the majority of the season. READ MORE