Scotts Bluff County, Nebraska air quality history

Daily Air Quality Index summaries from EPA monitors in Scotts Bluff, Nebraska, 1988–2025.

96%

Good days in 2025

Median daily AQI, 2025

Days above 100 in 2025

308

Days with an AQI in 2025 (of 365)

In 2025, EPA reported a daily Air Quality Index (AQI) for Scotts Bluff, Nebraska on 308 days. 295 of those days (96%) were in the Good range, and the median daily AQI was 23. That median is lower than the typical monitored county in Nebraska (median 34 across 10 counties), and lower than the typical monitored U.S. county (40). The main pollutant was fine particles (PM2.5) on 308 days. Across the years with fuller monitoring, the share of Good days rose: an average of 84% in 2005–2011 versus 90% in 2023–2025.

Years with fewer than 120 monitored days (2014, 2015, 2016, 2017, 2018, 2019…) are shown in the table but left out of comparisons and trend statements.

How the days broke down each year

Each bar is one year. The colored segments show the share of monitored days that fell in each AQI category.

Good
Moderate
Unhealthy for Sensitive Groups
Unhealthy
Very Unhealthy
Hazardous

Typical and high-end AQI over time

The median is the middle day of the year. The 90th percentile is the level that only the highest 10% of days exceeded.

Median daily AQI
90th-percentile daily AQI

Main pollutant by day, 2025

On each monitored day, the AQI reflects whichever measured pollutant had the highest index. This counts how many days each pollutant set the AQI. A pollutant that was not measured here cannot appear.

Pollutant	Days as main pollutant	Share of monitored days
Fine particles (PM2.5)	308	100%

Year-by-year data

Annual AQI summary by year
Year	Days with AQI	Good	Moderate	Unhealthy for Sensitive Groups	Unhealthy	Very Unhealthy	Median AQI	90th pct.	Max AQI	Main pollutant
2025	308	295	13	0	0	0	23	42	64	PM2.5
2024	320	284	36	0	0	0	16	52	89	PM2.5
2023	343	298	44	0	0	1	21	52	225	PM2.5
2022	339	331	8	0	0	0	16	36	79	PM2.5
2021	332	294	38	0	0	0	21	53	82	PM2.5
2020	278	170	106	2	0	0	36	61	122	PM2.5
2019	113	107	6	0	0	0	25	45	74	PM2.5
2018	116	91	25	0	0	0	29	54	74	PM2.5
2017	113	80	32	1	0	0	31	59	142	PM2.5
2016	87	77	10	0	0	0	26	52	62	PM2.5
2015	98	87	11	0	0	0	28	53	81	PM2.5
2014	98	87	11	0	0	0	24	51	82	PM2.5
2013	89	79	10	0	0	0	27	52	61	PM2.5
2012	237	141	94	1	1	0	48	71	161	Ozone
2011	189	146	43	0	0	0	45	61	87	Ozone
2010	210	175	35	0	0	0	43	54	80	Ozone
2009	66	61	5	0	0	0	23	49	62	PM2.5
2008	105	82	23	0	0	0	32	57	92	PM2.5
2007	107	84	23	0	0	0	36	55	71	PM2.5
2006	109	98	11	0	0	0	28	51	85	PM2.5
2005	121	109	12	0	0	0	26	50	71	PM2.5
2004	87	74	13	0	0	0	28	53	63	PM2.5
2003	107	91	16	0	0	0	30	55	77	PM2.5
2002	106	95	11	0	0	0	28	51	71	PM2.5
2001	86	72	14	0	0	0	31	54	66	PM2.5
2000	96	81	15	0	0	0	32	53	75	PM2.5
1999	73	58	15	0	0	0	33	61	94	PM2.5
1998	5	4	1	0	0	0	20	78	78	PM10
1997	29	27	2	0	0	0	24	39	54	PM10
1996	33	32	1	0	0	0	20	41	60	PM10
1995	48	45	3	0	0	0	24	44	73	PM10
1994	59	58	1	0	0	0	20	39	55	PM10
1993	58	54	4	0	0	0	22	44	64	PM10
1992	61	58	3	0	0	0	22	41	53	PM10
1991	54	50	4	0	0	0	25	43	61	PM10
1990	58	55	3	0	0	0	23	45	82	PM10
1989	39	28	11	0	0	0	29	59	89	PM10
1988	36	31	5	0	0	0	26	54	73	PM10

What this data can and can’t tell you

It is a county-level summary. EPA reports one AQI per day for the county, based on the monitors operating there. Air at a particular street, school or home can differ, especially near roads, industry or wildfire smoke.

It is not a health assessment. The AQI is EPA’s scale for communicating daily air quality. A county’s history can’t tell you what the health risk is for any particular person. For daily conditions and health guidance, see AirNow.

Rules change over time. EPA has revised AQI breakpoints, most recently for fine particles in 2024, so some year-to-year change can reflect the scale rather than the air.

Counties in Nebraska with a similar median AQI in 2025

All monitored counties in Nebraska

Source: U.S. EPA AirData, “Annual AQI by County” files for 1988–2025 (EPA download page). EPA file dates: 2026-06-26. Imported into EnviroNearby November 5, 2026. How we use this data · Report a problem