Hawaii Noise Ordinance: Decibel Limits, Hours, and Penalties

The Hawaii noise ordinance framework caps sound at the property line based on zoning: 55 dBA daytime and 45 dBA nighttime in residential and conservation areas, 60/50 dBA in commercial zones, and 70 dBA around the clock in industrial zones, with daytime running 7:00 a.m. to 10:00 p.m. and nighttime the rest.¹ Separate statutes govern vehicles, leaf blowers, and animals. Penalties climb to $10,000 per day for community noise violations, with each day counting as a separate offense.

Decibel Limits by Zone

Hawaii Administrative Rules Title 11, Chapter 46 sorts land into three classes and sets a ceiling for each:

Class A (residential, conservation, open space): 55 dBA daytime, 45 dBA nighttime
Class B (commercial, business, mixed-use): 60 dBA daytime, 50 dBA nighttime
Class C (industrial): 70 dBA at all times

A source violates the limit if it exceeds the threshold for more than ten percent of any twenty-minute period.¹ A slamming door or a truck passing by won’t count. A generator droning above the limit for three or four minutes within a twenty-minute window will.

These numbers are lower than most people guess. Normal conversation runs around 60 dBA, already over the nighttime residential ceiling. The state uses A-weighted decibels because that weighting matches how the ear hears.²

Where the Sound Is Measured

Readings are taken at or beyond the property line of the premises producing the noise, in a manner the director of health deems appropriate.³ The measuring point is the neighboring property’s boundary, not the spot next to the speaker. Sound falls off with distance, so a stereo running at 80 dBA in a garage might read well below the limit at the fence.

Meters and calibrators must meet ANSI S1.4-1983 for Type I or Type II sound level meters, and officers are expected to calibrate before and after each use.¹ Improper calibration is one of the main ways to challenge a reading later.

Construction Hours and Permits

Construction that will exceed the maximum permissible sound levels requires a noise permit from the Department of Health. The director can grant, modify, suspend, revoke, or deny the permit based on public interest and the availability of noise control technology.⁴

Even with a permit, noisy construction is confined to set hours:

Monday through Friday: 7:00 a.m. to 6:00 p.m.
Saturday: 9:00 a.m. to 6:00 p.m.
Sundays and holidays: no construction noise above permissible levels

No permit authorizes work outside these windows.¹ Violating any permit condition or any provision of Chapter 46 can cost the contractor the permit itself after a hearing, which often hurts more than the fine.

Leaf Blower Hours

A statewide statute restricts leaf blowers inside any residential zone or within 100 feet of one:

Monday through Saturday (non-holidays): 8:00 a.m. to 6:00 p.m.
Sundays and state or federal holidays: 9:00 a.m. to 6:00 p.m.

The statute covers any machine used to blow leaves, dirt, or other debris off sidewalks, driveways, lawns, and similar surfaces.⁵ There’s no decibel test here. Operation outside the permitted hours is the violation.

Vehicle Noise

Two vehicle rules come up most often. Using, selling, altering, or installing a muffler that noticeably increases a vehicle’s noise above its factory level is prohibited on public highways, and officers can cite the driver on the spot. The fine runs $25 to $250 per offense.⁶

A car alarm that sounds continuously for more than five minutes exposes the registered owner to a fine of up to $100, regardless of intent.⁷

Barking Dogs

Animal noise is handled at the county level, so the specific threshold depends on where you live. Hawaii County, for example, defines a noisy dog as one that barks continuously for ten minutes or intermittently for twenty minutes within any thirty-minute period, at any time of day.⁸ A dog is generally not treated as a nuisance if it barks at a trespasser or in response to some other legitimate provocation.

Reports go through the local police non-emergency line. In Honolulu, the police department is the lead agency for animal nuisance complaints.⁹

What the Rules Don’t Cover

Several categories are exempt from Chapter 46’s decibel limits:

Emergency vehicles and warning systems, including police, fire, ambulance, civil defense sirens, burglar alarms, and fire alarms
Emergency maintenance and repair of state and county highways, parks, and utilities such as water, sewer, electric, gas, and telephone, as long as the noise stays confined to the equipment in use
Construction and remedial work tied to emergency repair of damage from tsunamis, hurricanes, and similar disasters

¹⁰

Farming has its own protection under Hawaii’s right-to-farm statute. No court or public official may declare a farming operation a nuisance if it has been conducted consistently with generally accepted agricultural practices, and there’s a rebuttable presumption that farming is not a nuisance.¹¹

School functions approved by the principal or an authorized representative are also exempt from the general permit requirement for students through twelfth grade, though the activities are limited to hours beginning at 7:00 a.m.¹² Cultural events and other public-interest activities can obtain permits from the Department of Health, which weighs environmental impact and available noise controls.⁴

Penalties

Community noise violations under Chapter 46 carry fines of up to $10,000 per offense, and each day a violation continues is treated as a separate offense.¹⁰ A week of noncompliance can theoretically reach $70,000. Obstructing a Department of Health inspector who’s authorized to enter a premises adds a fine of up to $500.

Vehicular noise violations are civil infractions enforceable by police. Fines range from $25 to $2,500 per offense, with each day a separate violation.¹³ Modified muffler violations fall into a narrower $25 to $250 range.⁶

Construction sites face permit suspension or revocation on top of any fine when the holder violates a permit condition or any provision of the noise control rules.¹

Extra Exposure for Bars, Rentals, and Renters

Liquor-licensed businesses answer to a second enforcement track. The Liquor Commission can investigate whether a licensed establishment violates Department of Health noise levels, and at renewal it can deny or withhold a license when complaints or investigations show that noise from the premises or from patrons leaving the business disturbs residents or exceeds state or county standards.¹⁴ The commission or its adjudication board can also revoke or suspend a license, assess a penalty of up to $2,000, or issue a formal reprimand, on top of any fine the Department of Health imposes.

Short-term rental owners should read the definition of “owner” carefully. Under the administrative rules, it covers lessees, agents, tenants, operators, and anyone with regular control of the premises, and the rules prohibit any such person from operating an excessive noise source without a permit.¹ Even when a guest is the one making the noise, the owner who controls the premises can face enforcement. Clear noise rules in the rental agreement and posted quiet hours strengthen the owner’s position.

Renters carry their own risk. A landlord can begin eviction proceedings when a tenant commits serious or repeated lease violations, including violations of federal, state, or local law tied to use of the premises.¹⁵ One warning about a loud gathering rarely leads to eviction. A pattern of documented citations can.

How to Report a Violation

For an immediate disturbance like a loud party or blaring music, call the local police non-emergency number. In Honolulu, officers can cite the disturbing party if the noise meets the statutory definition of unreasonable noise, which includes any noise that interferes with communication, work, rest, recreation, or sleep.⁹

For ongoing agricultural, industrial, or commercial noise, the Department of Health’s Indoor and Radiological Health Branch handles complaints. The Noise Section can be reached at (808) 586-4700 on Oahu.¹⁶ Response times can stretch to a week or more, so keep a written log of dates, times, duration, and type of noise. That record supports any later complaint or court filing.

Fighting a Citation

The most effective defense usually targets the measurement. The state must show that the meter met ANSI specifications, was properly calibrated at the time of the reading, and was operated by someone competent to use it. When the equipment wasn’t calibrated close to the time and place of measurement, or when the operator can’t establish that the device was functioning correctly, the reading can be excluded.¹⁷

You can also argue that a recognized exemption applied or that a valid permit covered the activity. If the noise occurred during a permitted construction window or as part of an exempt agricultural operation, the state has to show the exemption doesn’t apply.

1
Hawaii Department of Health. Hawaii Administrative Rules Title 11 Chapter 46 Community Noise Control
2
Legal Information Institute. Hawaii Code R 11-46-1 – Purpose
3
Legal Information Institute. Hawaii Code R 11-46-4 – Maximum Permissible Sound Levels in dBA
4
Legal Information Institute. Hawaii Code R 11-46-7 – Permits
5
Justia. Hawaii Revised Statutes 342F-30.8 Leaf Blowers Restrictions
6
Justia. Hawaii Revised Statutes 291-24.5 Motor Vehicle Muffler
7
Justia. Hawaii Revised Statutes 291-24.6 Motor Vehicle Alarm Systems
8
Laserfiche WebLink. Chapter 04 Animals
9
Honolulu Police Department. Animal Nuisance and Dangerous Dog Complaints Policy
10
Department of Health. Hawaii Administrative Rules Title 11 Chapter 46 Community Noise Control
11
Justia. Hawaii Revised Statutes 165-4 – Right to Farm
12
Justia. Hawaii Revised Statutes 342F-30 Prohibition
13
Justia. Hawaii Revised Statutes 342F-9 – Penalties
14
Honolulu.gov. Liquor Laws of Hawaii Chapter 281
15
Legal Information Institute. Eviction – Termination of Tenancy by Owner
16
Hawaii Department of Health. Oahu Noise Reference Manual
17
United States Environmental Protection Agency. State and Local Guidance Manual for Prosecutors – Noise Violations