This portal contains several documents to help you in meeting the regulatory requirement of monitoring drinking water supply wells. Monitoring for nitrates at 10 mg/L or less began for Sacramento Valley rice growers in 2022. The monitoring is an annual requirement unless you have three consecutive years of 8 mg/L or less, then the monitoring is once every five years.

You monitor drinking water supply wells on parcels where rice is produced. These are wells that provide drinking water to a faucet. Sample collection is from the well and not the facet supplying the drinking water. Please do not monitor your irrigation wells.

Drinking Water Well Supply Survey

Please respond to the Survey Monkey by reporting the number of wells you have per county. We must report the number of wells by county and not specific details. The Survey Monkey helps us avoid paying for a study to estimate the number of wells by county.

Take the Survey

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The list below provides documents from which you select relevant to your situation.