Thornton, CO Noise Ordinances: Quiet Hours (2026)
Quiet hours in Thornton, CO, also called the noise ordinance, nighttime noise rules, or residential quiet time, define the hours during which excessive noise is prohibited.
Key Facts
- Bells/chimes allowed
- 7:00 a.m. to 10:00 p.m.
- Bells/chimes restricted
- 10:00 p.m. to 7:00 a.m.
- Quiet zones
- Schools, churches, hospitals, nursing homes
- Quiet zone trigger
- Conspicuous posted signage required
- Governing section
- City Code § 38-441(a)(3)a, (a)(4), (b)(2)
Summary
Thornton restricts bells and chimes to the hours of 7:00 a.m. to 10:00 p.m.; running them between 10:00 p.m. and 7:00 a.m. in violation of Table A's decibel limits is a noise violation. The city can also post conspicuous signs declaring a "quiet zone" around schools, churches, courthouses, hospitals, and nursing homes.
a.Bells and chimes or any device for the production or reproduction of the sound of bells or chimes operated between the hours of 10:00 p.m. of one day and 7:00 a.m. of the following day and is in violation of the sound level standards contained in subsection (c), Table A herein... (2)Bells and chimes or any device for the production or reproduction of the sound of bells or chimes from any church, school, or clock, operated between the hours of 7:00 a.m. and 10:00 p.m., are excluded from the provisions of this section... (4)Areas around public or private schools, churches or courthouses while such are in use, hospitals, nursing homes, or homes for the aged are especially sensitive to noise. When provided with conspicuous signs displayed on adjacent or surrounding streets, an area containing one of these uses may be declared a quiet zone.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 65).
Full Breakdown
the next day if doing so exceeds Table A's sound level standards. without restriction, effectively setting the city's quiet-hours window for that noise source. Separately, subsection (a)(4) recognizes that areas around public or private schools, churches, or courthouses while in use, plus hospitals, nursing homes, and homes for the aged, are "especially sensitive to noise," and the city may declare any such area a quiet zone once it posts conspicuous signs on the adjacent or surrounding streets. Once posted, the quiet-zone designation reinforces enforcement of the general unreasonable-noise standard in the area, layering onto the citywide Table A limits and the specific per-se violations listed in (a)(2) and (a)(3), such as noise plainly audible more than 25 feet from its source.
Violations & Fines
Operating bells or chimes outside the 7:00 a.m. to 10:00 p.m. window in violation of Table A is a noise violation under § 38-441 and can draw an immediate summons and complaint, or a written notice to abate under § 38-452(d) giving 24 hours to 5 days to comply. Noise inside a posted quiet zone is judged against the same enforcement standards, with quiet-zone status serving as an added factor supporting a citation.
Frequently Asked Questions
Does Thornton have set quiet hours at night?
What is a designated quiet zone in Thornton?
Can a church ring bells at night in Thornton?
Sources & Official References
Other rules in Thornton
How Thornton compares: Cities with the Strictest Noise Ordinances·Compare Thornton to another location·View the Colorado noise ordinances overview
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Quiet Hours in Nearby Cities
How other cities in Adams County handle quiet hours.