Del Norte County's noise ordinance (County Code Title 7, Chapter 7, added October 2022) caps noise on residential property at 55 dB(A) daytime and 50 dB(A) from 10 p.m. to 7 a.m. A data center's cooling and generators must meet these limits; a violation is a misdemeanor.
Del Norte County has no noise rule written for data centers, so a facility's fixed equipment falls under the countywide noise ordinance in Title 7, Chapter 7, added to the County Code in October 2022. The code defines a fixed noise source to include industrial machinery, compressors, fans, generators, air conditioners, and refrigeration equipment — exactly a data center's cooling and backup gear. Measured on any residential property, noise may not exceed 55 dB(A) between 7 a.m. and 10 p.m. or 50 dB(A) between 10 p.m. and 7 a.m., with those caps cut 5 dB(A) for pure-tone or impact noise. Because a data center runs continuously, the 50 dB(A) nighttime limit is the binding constraint.
Continuous noise above 50 dB(A) at night or 55 dB(A) by day, measured on any residential property, is a misdemeanor; each day is a separate offense.
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