A data center in unincorporated Alameda County must meet the County General Code Chapter 6.60 exterior noise standards at a receiving home: 50 dBA daytime and 45 dBA nighttime for more than 30 minutes an hour, rising to a hard cap of 70 dBA day / 65 dBA night.
Alameda County's noise ordinance, General Ordinance Code Chapter 6.60, sets graduated exterior limits by how long a noise persists in any hour, measured at the receiving property. For residential uses, schools, hospitals, churches, and libraries the daytime (7 a.m.–10 p.m.) standards are 50 dBA for 30 cumulative minutes, 55 dBA for 15 minutes, 60 dBA for 5 minutes, 65 dBA for 1 minute, and 70 dBA maximum; each nighttime (10 p.m.–7 a.m.) figure is 5 dBA lower, so the practical residential cap is 45 dBA overnight. Commercial receiving properties get a 65/60 dBA baseline.
Cooling or generator noise exceeding the Chapter 6.60 limits at a neighboring home is a violation; Alameda County can require mitigation and abatement, and unmitigated noise can block or add conditions to permit approval under CEQA.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
Alameda County, CA
Alameda County unincorporated areas allow leaf blowers during general construction/maintenance hours. California AB 1346 has banned the sale of new gas-power...
Alameda County, CA
Unincorporated Alameda County regulates RV parking through zoning ordinance. 72-hour street limit applies. Specific requirements vary by PD and zoning district.
Alameda County, CA
Alameda County unincorporated areas require driveways to be paved, maintain clear sight lines, and not block sidewalks or public right-of-way. Encroachment p...
Alameda County, CA
Alameda County Zoning Code §17.52.430 limits fences to 4 feet in required front yards and 6 feet in side and rear yards. A 2-foot limit applies within 30 fee...
Alameda County, CA
All fireworks - including 'safe and sane' types - are prohibited in unincorporated Alameda County. Only three cities (Dublin, Newark, Union City) permit safe...
Alameda County, CA
Unincorporated Alameda County applies California's Swimming Pool Safety Act (HSC 115920-115929) through Title 15 Chapter 15.08, which adopts the California B...
See how Alameda County's data center noise limits rules stack up against other locations.
Help us keep this page accurate. If you notice an error or outdated information, let us know.