South Fulton, GA Data Centers & Crypto Mining: Data Center Noise Limits (2026)
Key Facts
- Nighttime cap
- 55 dB(A) or +10 dB(A) above ambient, 11pm-7am
- Daytime cap
- 65 dB(A) or +10 dB(A) above ambient, 7am-11pm
- Measurement point
- Property line shared with residential use
- Generator testing window
- 9:00 a.m. to 5:00 p.m. only
- Emergency exception
- Generators may exceed limits during power outages
- Adopted
- Ord. No. 2024-034, § 4, 9-24-2024
Summary
South Fulton caps data center noise at the residential property line under Zoning Sec. 302.48(g): no more than 55 dB(A), or 10 dB(A) above ambient (whichever is louder), between 11:00 p.m. and 7:00 a.m., and 65 dB(A) between 7:00 a.m. and 11:00 p.m., with backup generator testing confined to weekday business hours.
(g)Maximum sound level.(1)Nighttime. Between 11:00 p.m. and 7:00 a.m., the data center shall not generate noise in excess of 55 dB(A) or 10 dB(A) above ambient levels (whichever is more), when measured at the property boundary line shared with a residential use.(2)Daytime. Between 7:00 a.m. and 11:00 p.m., the data center shall not generate noise in excess of 65 dB(A) or 10 dB(A) above ambient levels (whichever is more), when measured at the property boundary line shared with a residential use.(3)Use of backup generators that exceed the maximum sound levels is permitted during emergency power outages. Testing of backup generators is limited to the hours between 9:00 a.m. and 5:00 p.m.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 13 Update 1).
Full Breakdown
Sec. 302.48(g), added by Ord. No. 2024-034, § 4, adopted September 24, 2024, sets two sound ceilings measured at the property boundary line shared with a residential use. Nighttime, between 11:00 p.m. and 7:00 a.m., a data center cannot generate noise exceeding 55 dB(A) or 10 dB(A) above ambient levels, whichever number is higher. Daytime, between 7:00 a.m. and 11:00 p.m., the ceiling rises to 65 dB(A) or 10 dB(A) above ambient. The section carves out an exception for backup generators running during an actual emergency power outage, which may exceed those levels, but routine testing of backup generators is restricted to the hours between 9:00 a.m. and 5:00 p.m. so it cannot spill into nighttime hours. The same Sec. 302.48 also requires an energy use study before a data center can obtain a land disturbance permit, tying the noise standard to the same site-plan review that covers lot area, buffers and substations for the use.
Violations & Fines
A data center exceeding the dB(A) limits at a shared residential property line is enforced the same way as any other zoning violation, through Title 5, Chapter 1: Sec. 5-1005 requires written notice and a correction deadline before a misdemeanor citation issues, with each day of continued excess noise a separate offense, and Sec. 5-1010 authorizes the city to withhold building and occupancy permits until the facility complies.
Frequently Asked Questions
How loud can a South Fulton data center be at night?
Can a South Fulton data center's backup generators exceed the noise limit?
What is the daytime noise limit for a South Fulton data center?
Sources & Official References
Other rules in South Fulton
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