Nevada Irrigation District


NID Mission Statement

The District will provide a dependable, quality water supply; continue to be good stewards of the watersheds, while conserving the available resources in our care.

Latest News

NID tests for blue-green algae in Combie Reservoir

To ensure public safety, NID is testing Combie Reservoir water in response to a report of a possible cyanobacteria bloom. We will post the results as soon as the samples are analyzed.

The report was issued by the Central Valley Regional Water Quality Control Board. NID is working with the Board, as well as Nevada County, to determine if any toxic algae is present in the reservoir.

On Monday, Sept 16, NID officials patrolled Lake Combie looking for signs of cyanobacteria growth. No blooms were located during this investigation. Water quality samples were taken and sent to a local lab for analyzing. We also will continue to perform daily patrols to see if any algae reappears.

Around the state, algal blooms have become more common in waterways, such as reservoirs and rivers. Cyanobacteria, also called blue-green algae, occurs most often during late summer or early fall, and can release toxins. As a precaution, NID recommends that people and pets avoid direct contact with the water in Combie Reservoir or subsequent tributaries until the test results are in.

Today’s NID

NID is a diversified water resource district that supplies both treated drinking water and irrigation water to nearly 25,000 homes, farms and businesses in Nevada and Placer counties in the foothills of Northern California’s Sierra Nevada Mountains.

NID collects water from the mountain snowpack and stores it in an extensive system of 10 reservoirs. As water flows to customers in the foothills, it is used to generate clean hydroelectric energy and to provide public recreational opportunities.

NID is an independent California special district governed by an elected board.


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