Dairies and Livestock Feedlots in Stanislaus County, California

Why dairies here answer to a regional water board, not just the county

Stanislaus County's concentration of dairy operations, alongside comparable concentrations in neighboring San Joaquin Valley counties, has for decades raised documented concerns about nitrate contamination of groundwater from manure management -- concentrated animal waste, if not properly managed, can leach nitrates into the shallow aquifers that many rural residents and smaller water systems in the valley rely on for drinking water. In response, the Central Valley Regional Water Quality Control Board -- one of nine regional boards under the State Water Resources Control Board, with jurisdiction spanning the Sacramento and San Joaquin Valleys -- administers a waste-discharge requirements program specifically for confined animal facilities, including dairies.

This means a dairy or comparable confined animal feeding operation in Stanislaus County needs coverage under this regional program in addition to whatever county-level land-use permit or conditional use permit applies to the operation. Coverage typically requires the operation to develop and follow a nutrient management plan addressing how manure and wastewater are stored, applied to land, and monitored to limit groundwater impact -- a genuinely separate compliance track from county zoning and building permitting.

What this means for a buyer

If you're buying land specifically to operate a new dairy or expand an existing one, budget for two parallel approval tracks: the county's land-use and building permitting process, and the Central Valley Regional Water Quality Control Board's waste-discharge coverage and nutrient-management-plan requirements. These are administered by different agencies with different timelines, and neither substitutes for the other.

If you're buying land where a dairy or other confined animal facility already operates, or where one operated previously, ask specifically about the current status of its waste-discharge coverage and nutrient management plan, and whether the Regional Water Board has any open enforcement or compliance actions tied to the property -- groundwater-quality issues from historic manure management can be a material, long-tail liability that a general property inspection won't necessarily surface.

What to check before buying land for a dairy or livestock feedlot use

1. Confirm the parcel's current zoning designation with Stanislaus County Planning and Community Development, and whether the specific type and scale of confined animal operation you're planning is allowed by-right or requires a conditional use permit.
2. Contact the Central Valley Regional Water Quality Control Board directly to confirm current waste-discharge requirements and nutrient-management-plan standards applicable to your planned or existing operation's scale.
3. If buying land with an existing dairy or feedlot, request the property's current waste-discharge coverage status and ask whether any groundwater-monitoring data or enforcement history exists for the site.
4. Confirm well-water quality directly for any parcel near an existing or former confined animal facility, given the documented regional nitrate-contamination concern.
5. Ask about setback requirements between confined animal facilities and neighboring residential parcels or water sources, both under county zoning and any additional regional-board standards.