IMPROVE Nephelometer

Select a dataset:

Monitoring Site Locations:

Monitoring Site Metadata:

SiteCode	SiteName	CT	ST	EPACode	Lat	Lon	Elev	Start	End
ACAD2	Acadia NP	US	ME	230090103	44.38	-68.26	157	04/01/93	03/31/23
BIBE1	Big Bend NP	US	TX	480430101	29.3	-103.18	1067	01/01/98	03/31/23
BLIS1	Bliss SP (TRPA)	US	CA	060179000	38.98	-120.1	2131	07/01/96	03/31/06
BOWA1	Boundary Waters Canoe Area	US	MN	270759000	47.95	-91.5	527	04/01/93	12/31/97
BRIG1	Brigantine NWR	US	NJ	340019000	39.47	-74.45	5	04/01/93	06/30/94
CEBL1	Cedar Bluff	US	KS	201950001	38.77	-99.76	666	07/01/04	09/30/07
CHIR1	Chiricahua National Monument	US	AZ		32.01	-109.39	243	10/01/03	06/30/10
CHPA1	Children's Park - Tuscon	US	AZ		32.3	-110.98	704	04/01/03	09/30/10
COGO2	Columbia River Gorge #2	US	WA		45.57	-122.21	243	04/01/01	03/31/05
COHU1	Cohutta	US	GA		34.79	-84.62	743	01/01/04	03/31/07
CORI1	Columbia River Gorge	US	WA	530390011	45.66	-121	179	07/01/93	03/31/05
CRAY1	Tucson	US	AZ		32.2	-110.88	1707	01/01/01	09/30/10
DOSO1	Dolly Sods Wilderness	US	WV	540939000	39.11	-79.43	1182	04/01/93	12/31/06
DYRT1	Dysart - Phoenix	US	AZ		33.64	-112.34	364	07/01/03	06/30/16
ESTR1	Estrella Mountain Regional Park	US	AZ		33.38	-112.38	290	01/01/03	06/30/16
GICL1	Gila Wilderness	US	NM	350039000	33.22	-108.24	1776	04/01/94	12/31/03
GLAC2	Glacier NP	US	MT		48.51	-114	939	10/01/07	03/31/23
GRBA2	Great Basin NP	US	NV	320339000	39.01	-114.22	2066	01/01/08	03/31/23
GRCA2	Hance Camp at Grand Canyon NP	US	AZ	040058102	35.97	-111.98	2267	10/01/20	03/31/23
GRCA2	Hance Camp at Grand Canyon NP	US	AZ	040058102	35.97	-111.98	2267	10/01/97	09/30/20
GRER1	Greer Arizona	US	AZ		34.07	-109.44	2513	04/01/01	06/30/10
GRGU1	Great Gulf Wilderness	US	NH	330074002	44.31	-71.22	454	04/01/95	03/31/05
GRSM1	Great Smoky Mountains NP	US	TN	470090101	35.63	-83.94	811	04/01/93	03/31/23
GRTE1	Grand Teton National Park	US	WY		43.67	-110.6	2105	07/01/11	09/30/21
GRVS1	Green River Visibility Study	US	WY		41.84	-109.61	1950	07/01/96	12/31/00
HUMB1	Humble Mountain	US	AZ		33.98	-111.78	1586	01/01/97	12/31/03
IKBA1	Ike's Backbone	US	AZ	040258104	34.34	-111.68	1298	04/01/01	06/30/10
INGA1	Indian Gardens	US	AZ	040058100	36.08	-112.13	1166	04/01/04	09/30/13
JARB1	Jarbidge Wilderness	US	NV	320079000	41.89	-115.43	1869	04/01/93	12/31/97
JARI1	James River Face Wilderness	US	VA	511639000	37.63	-79.51	290	10/01/00	12/31/03
LOPE1	Lone Peak Wilderness	US	UT	490499000	40.44	-111.71	1768	10/01/93	09/30/01
LTBV1	Lake Tahoe Blvd.	US	CA		38.95	-119.96	1902	01/01/96	09/30/04
LTBV2	Lake Tahoe Blvd.	US	CA		38.93	-119.96	1904	10/01/05	03/31/06
LYBR1	Lye Brook Wilderness	US	VT	500038001	43.15	-73.13	1015	07/01/93	12/31/03
MACA1	Mammoth Cave NP	US	KY	210619000	37.13	-86.15	235	10/01/20	03/31/23
MACA1	Mammoth Cave NP	US	KY	210619000	37.13	-86.15	235	01/01/93	09/30/20
MAYV1	Mayville	US	WI		43.44	-88.53	306	10/01/00	12/31/06
MAZA1	Mazatzal	US	AZ		33.91	-111.43	2164	01/01/97	09/30/00
MCFD1	McFadden Peak	US	AZ		34	-111	2175	10/01/97	03/31/00
MILW1	Milwaukee	US	WI		43	-87.89	193	04/01/04	06/30/06
MORA1	Mount Rainier NP	US	WA	530530014	46.76	-122.12	439	01/01/93	03/31/23
MOZI1	Mount Zirkel Wilderness	US	CO	080579000	40.54	-106.68	3243	10/01/93	09/30/09
MUSR1	Muleshoe Ranch	US	AZ		32.35	-110.23	1402	07/01/97	06/30/05
NACA1	National Capitol - Central, Washington D.C	US	DC		38.9	-77.04	514	04/01/03	03/31/16
NEBR1	Nebraska NF	US	NE	311719000	41.89	-100.34	883	07/01/05	09/30/07
OKEF1	Okefenokee NWR	US	GA	130499000	30.74	-82.13	48	01/01/93	06/30/97
ORPI1	Organ Pipe National Monument	US	AZ		31.95	-112.8	366	04/01/03	06/30/10
PEFO3	Petrified Forest NP	US	AZ		34.91	-109.8	1690	10/01/03	06/30/10
PHON1	Phoenix	US	AZ		33.5	-112.1	372	04/01/97	06/30/18
QUAK1	Quaker City	US	OH		39.94	-81.34	372	04/01/02	03/31/04
QUVA1	Queen Valley - Superstition Wilderness	US	AZ		33.29	-111.29	668	04/01/03	06/30/10
ROMA1	Cape Romain NWR	US	SC	450190046	32.94	-79.66	5	01/01/04	12/31/12
ROMO3	Rocky Mountain NP	US	CO		40.28	-105.55	2760	01/01/08	03/31/23
RUCA1	Rucard Canyon	US	AZ		31.78	-109.3	1637	10/01/97	06/30/01
SENY1	Seney NWR	US	MI		46.29	-85.95	216	01/01/02	06/30/06
SHEN1	Shenandoah NP	US	VA	511139000	38.52	-78.43	1079	07/01/96	03/31/23
SHRO1	Shining Rock Wilderness	US	NC	370870035	35.39	-82.77	1617	04/01/94	09/30/99
SIAN1	Sierra Ancha	US	AZ	040078100	34.09	-110.94	1600	07/01/00	06/30/10
SNPA1	Snoqualmie Pass	US	WA	530370004	47.42	-121.43	1049	07/01/93	06/30/01
SYCA1	Sycamore Canyon	US	AZ	040058103	35.14	-111.97	2046	07/01/98	06/30/10
THSI1	Three Sisters Wilderness	US	OR	410390070	44.29	-122.04	885	07/01/93	06/30/01
TUCN1	Tucson Central	US	AZ		32.24	-110.96	745	04/01/97	06/30/09
TUMO1	Tucson Mountain #1	US	AZ		32.28	-111.17	754	10/01/96	12/31/01
TUMO2	Tucson Mountain #2	US	AZ		32.28	-111.17	754	10/01/01	06/30/10
UPBU1	Upper Buffalo Wilderness	US	AR	051019000	35.83	-93.2	723	01/01/93	09/30/09
VEIX1	Vehicle Emissions - Phoenix	US	AZ		33.46	-112	345	04/01/03	06/30/16
VIIS1	Virgin Islands NP	US	VI	780209000	18.34	-64.8	51	04/01/98	09/30/05
WIMO1	Wichita Mountains	US	OK	400319000	34.73	-98.71	509	07/01/04	09/30/07

Parameters Reported:

Code	Name	Units	from	SourceCode	SourceUnits
AT	Air Temperature	Deg C	<--	AT	Deg C
bsp	Light scattering coefficient	1/Mm	<--	BSP	1/Mm
TPINT	Internal instrument temperature	Deg C	<--	CT	Deg C
RH	Relative Humidity (Station Hourly)	%	<--	RH2	%

Data Flags:

FlagCode	Description	Category	SourceColumn	StatusFlag
0	valid	Validity	V	V0
1	interference	Validity	V	V4
2	invalid	Validity	V	I0
9	suspect	Validity	V	V4
A	RH>RH threshold, bsp>maximum bsp threshold	Interference	A	V4
B	bsp>maximum bsp threshold	Interference	A	V4
C	RH>RH threshold	Interference	A	V4
D	SD/M>uncertainty threshold	Interference	A	V4
E	RH>RH threshold, bsp>maximum bsp threshold, SD/M>uncertainty threshold	Interference	A	V4
F	bsp>maximum bsp threshold, SD/M>uncertainty threshold	Interference	A	V4
G	RH>RH threshold, SD/M>uncertainty threshold	Interference	A	V4
H	delta bsp>delta threshold	Interference	A	V4
I	RH>RH threshold, bsp>maximum bsp threshold, delta bsp>delta threshold	Interference	A	V4
J	bsp>maximum bsp threshold, delta bsp>delta threshold	Interference	A	V4
K	RH>RH threshold, delta bsp>delta threshold	Interference	A	V4
L	SD/M>uncertainty threshold, delta bsp>delta threshold	Interference	A	V4
M	RH>RH threshold, bsp>maximum bsp threshold, SD/M>uncertainty threshold, delta bsp>delta threshold	Interference	A	V4
N	bsp>maximum bsp threshold, SD/M>uncertainty threshold, delta bsp>delta threshold	Interference	A	V4
O	RH>RH threshold, SD/M>uncertainty threshold, delta bsp>delta threshold	Interference	A	V4
Z	Weather observation between two other weather observations	Interference	A	V4