Illinois Administrative Code
Title 35 - ENVIRONMENTAL PROTECTION
Part 910 - MEASUREMENT PROCEDURES FOR THE ENFORCEMENT OF 35 ILL. ADM. CODE 900 AND 901
Appendix A - Tables of Long-Term Background Ambient Noise
Table C - Daytime long-term background ambient L[eq] levels in decibels by land use categories and octave-band level

Universal Citation: 35 IL Admin Code § C

Current through Register Vol. 48, No. 38, September 20, 2024

	Background Category
Octave-Band Center Frequency (Hz)	1	2	3	4	5
31	70	63	55	49	43
63	71	64	57	51	45
125	72	64	57	51	45
250	70	63	55	49	43
500	67	59	51	45	39
1000	63	54	45	39	33
2000	57	48	38	33	26
4000	53	42	30	25	20
8000	48	36	24	19	13

Disclaimer: These regulations may not be the most recent version. Illinois may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.