Bad Air Days in Terrebonne Parish, Louisiana

Not enough data

EPA monitors in Terrebonne Parish ran on too few days between 2016 and 2025 to give a fair yearly count (about 33% of days covered). Neighbouring counties below are a better guide.

What actually helps here

EPA monitors here ran too few days to give a fair yearly count. Use AirNow for today's air.

The record for Terrebonne

The worst recent year was 2023, with 3 bad days on 115 monitored days.

Date	AQI	Main pollutant
2023-08-31	176	PM2.5
2023-09-18	131	PM2.5
2023-09-12	116	PM2.5
2024-01-01	99	PM2.5
2022-06-13	96	PM2.5

An ordinary day in Terrebonne

Across 1,190 monitored days from 2016 to 2025, the air in Terrebonne Parish rated Good on 75% of them, close to the 72% typical of monitored counties, and Moderate on 24%. The median day sat at AQI 38; one day in ten went above 56.

The pollutant setting the AQI on an ordinary day here:

fine particles (PM2.5)100%1,190 days

Year by year

Year	Days monitored	Good	Moderate	Over 100	Over 150	Median AQI	Highest AQI
2025*	122	89	33	0	0	42	66
2024	123	85	38	0	0	39	99
2023	115	77	35	3	1	43	176
2022	121	90	31	0	0	38	96
2021	110	89	21	0	0	34	64
2020	120	92	28	0	0	36	77
2019	120	93	27	0	0	37	73
2018	119	95	24	0	0	36	73
2017	120	90	30	0	0	37	88
2016	120	97	23	0	0	37	76
2015	122	95	27	0	0	34	79
2014	121	87	34	0	0	38	67
2013	117	91	26	0	0	38	70
2012	118	86	32	0	0	37	72
2011	123	76	47	0	0	44	71
2010	120	71	49	0	0	47	71

*2025 may be a partial year in EPA's file.

Louisiana compared

How this is counted

A bad air day is a day the county's daily AQI from EPA AirData went above 100, the level where EPA tells children, older adults and people with asthma or heart disease to cut back outdoors. Monitors do not run every day, so yearly counts are scaled to 365 days. This is the record, not today's air: for that, check AirNow. More on the method in how the county numbers are made, on the AQI 100 line in what counts as a bad air day.