Find Your Management Zone


This interactive map works similarly to other mapping applications you have used. You can navigate around and zoom in and out. Click or touch on the location you are interested in, and a popup will appear showing contact information for active Nitrate Management Zones.

The Management Zones are color coded to make their boundaries clear. The priority 2 areas are orange; Nitrate Management Zones have not been established yet in these areas. Locations supplied by municipal water supplies are grey and not covered by the Nitrate Control Program (If you are in one of these areas, an easy way to tell is if you or your landlord pays a monthly water bill). The other colors show active Management Zones.

Management Zone Activities Launched in Six Priority 1 Areas

Many activities are underway to achieve compliance with the new Nitrate Control Program in the Central Valley’s six Priority 1 subbasins, where safe drinking water must be provided in areas with high nitrate levels and nitrate management plans must be adopted beginning in 2021. These subbasins include Modesto, Turlock, Chowchilla, Kings, Kaweah, and Tule.

Early steps on the path toward compliance have included outreach to permittees and disadvantaged community leaders, data collection, cost assessments, provision of drinking water, and progress toward the complex task of Management Zone formation.

Dischargers in Modesto and Turlock subbasins have formed the Valley Water Collaborative, a nonprofit serving as the governance entity for the Management Zone in these subbasins. The 12-member board of directors met for the first time in August, adopted bylaws, and selected consultants to document nitrate contamination and develop plans. Board members represent the irrigated lands coalition, food processors, cities, and dairy, winery, and poultry interests.

In the Chowchilla subbasin, staff from the Madera County Farm Bureau and Water Wise have reached out to permittees to gauge their interest in joining a Management Zone. They have also been gathering required groundwater data. On tap next: discussing governance for the Management Zone and assessing preliminary costs for drinking water supply approaches. Early activities include outreach to disadvantaged communities regarding the safe drinking water options.

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Central Valley Salinity Coalition

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