Council Bluffs, IA Noise Ordinances: Decibel Limits (2026)
Key Facts
- Residential daytime limit
- 55 dBA
- Residential nighttime limit
- 45 dBA
- Industrial into residential (night)
- 55 dBA
- Commercial into commercial (anytime)
- 65 dBA
- Measurement distance
- At least 50 feet from source
- Pure-tone correction
- Minus 5 dBA
Summary
Council Bluffs sets numeric decibel ceilings by the zoning of the receiving property and the time of day. A source in a residential area may not exceed 55 dBA in daytime or 45 dBA at night, with higher ceilings when the noise crosses into or within commercial or industrial land.
8.1 Maximum Permissible Sound Levels by Receiving Land Use. It is unlawful for any person to operate or cause to be operated on private property any source of sound in such a manner as to create a sound level which exceeds the limits set forth for the receiving land use category in Table 1 as follows, unless otherwise provided in this chapter, when measured at or within the property boundary of the receiving land use ... Sound Emitting Land-Use Category Sound Receiving Land-Use Category Sound Level Time of Day Sound Level Limit, dBA Leq(1) Residential Residential Daytime 55 Nighttime 45 Business/Commercial Residential Daytime 60 Nighttime 50 Industrial Residential Daytime 65 Nighttime 55
Full Breakdown
Council Bluffs Municipal Code § 4.50.080, Table 1, fixes maximum permissible sound levels by the land use of the property receiving the sound, measured at or within that property's boundary and never closer than fifteen meters (fifty feet) from the source. When the receiving land use is residential, the limit is 55 dBA Leq(1) in the daytime (7:00 a.m. to 10:00 p.m. per § 4.50.030's definitions of Day and Night) and drops to 45 dBA at night from a residential source, 50 dBA at night from a business/commercial source, and 55 dBA at night from an industrial source.
Daytime limits into residential land run 55, 60 and 65 dBA for residential, commercial and industrial sources respectively. Sound crossing into business/commercial receiving land is capped at 60 to 65 dBA at any time, and industrial-to-industrial sound may run up to 75 dBA at any time. Section 4.50.080 also cuts any limit by five dBA for a pure tone or impulsive sound under paragraph 8.2, and exempts interstate railway locomotives, farmland and normal agricultural activity, and a defined electric utility generation facility capped separately at 65 dBA to residential land under paragraph 8.3.
The chief building official and Council Bluffs Police Department enforce the chapter under § 4.50.040, and § 4.50.110 lets the director declare an emergency halt to sound exceeding the Table 4 immediate-threat levels, which start at 95 dBA for four hours and rise to 115 dBA for fifteen minutes.
Violations & Fines
Exceeding the Table 1 limit is a chapter 4.50 nuisance violation under § 8.54.010. The city attorney may prosecute it as a municipal infraction with civil penalties of $750 for a first offense and $1,000 for each subsequent offense plus surcharge and court costs under § 1.95.020, or as a criminal misdemeanor under § 8.54.020 with penalties set by § 8.02.020. Each day of continued violation is a separate offense.
Frequently Asked Questions
What is the residential noise limit in Council Bluffs?
Do commercial and industrial areas have higher noise limits?
How is noise measured for enforcement in Council Bluffs?
Are any noise sources exempt from the decibel table?
Sources & Official References
Other rules in Council Bluffs
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