FED Dataset Updates

Dataset Update History

Below is a list of updates to the database in reverse chronological order. Currently, there is no predetermined schedule by which updates are made. In general, the project team makes the decision to update a given dataset based on an ad hoc assessment of demand, availability, and available resources. If you would like to see a particular dataset updated, please contact us.

UpdateDate	Dataset	DatasetItem	DateRange	Sites	Params	Records
03/28/2024	EPA CSN	EPACSN_2021_2023p_R20240321_I20240328_STEP2	01/01/21 - 12/28/23	149	94	2,557,309
03/27/2024	IMPROVE Aerosol	IMPAER_UCD_202307_R20240326_I20240327	07/02/23 - 07/29/23	157	99	165,990
02/29/2024	IMPROVE Aerosol	IMPAER_UCD_202305_202306_R20240228_I20240229	05/03/23 - 06/29/23	157	99	335,760
02/20/2024	IMPROVE Aerosol Preliminary	IMPAERPRE_UCD_202305_202312_R20240201_I20240220	05/03/23 - 12/29/23	157	99	513,659
02/20/2024	EPA CSN	EPACSN_2021_2023p_R20240220_I20240220_STEP2	01/01/21 - 12/28/23	149	94	2,475,520
01/08/2024	EPA CSN	EPACSN_2021_2023p_R20240108_I20240108_STEP2	01/01/21 - 09/28/23	149	94	2,395,429
01/04/2024	IMPROVE Aerosol Preliminary	IMPAERPRE_UCD_202305_202311_R20240104_I20240104	05/03/23 - 11/29/23	157	99	248,971
01/04/2024	IMPROVE Aerosol	IMPAER_UCD_202304_R20240103_I20240104	04/03/23 - 04/30/23	157	99	167,880
12/08/2023	IMPROVE Aerosol Preliminary	IMPAERPRE_UCD_202304_202310_R20231201_I20231208	04/03/23 - 10/30/23	157	99	248,270
12/07/2023	IMPROVE Aerosol	IMPAER_UCD_202303_R20231207_I20231207	03/01/23 - 03/31/23	157	99	184,668
11/17/2023	EPA CSN	EPACSN_2021_2023p_R20231117_I20231117_STEP2	01/01/21 - 09/28/23	148	94	2,320,874
11/08/2023	IMPROVE Aerosol Preliminary	IMPAERPRE_UCD_202303_202309_R20231102_I20231108	03/01/23 - 09/30/23	157	99	365,377
11/08/2023	IMPROVE Aerosol Preliminary	IMPAERPRE_UCD_202212_202307_R20230905_I20230907	12/01/22 - 07/29/23	158	99	481,421
11/08/2023	IMPROVE Aerosol	IMPAER_UCD_202301_202302_R20231108_I20231108	01/03/23 - 02/26/23	157	99	318,972
10/09/2023	IMPROVE RHR3 Group Means	IMPRHR3_Group_Means_R20231006_I20231006	01/01/89 - 01/01/22	182	34	762,348
10/09/2023	IMPROVE RHR3 Metrics	IMPRHR3_Daily_Budgets_R20231006_I20231006	01/04/89 - 12/31/22	195	58	24,432,558
10/06/2023	IMPROVE RHR2 Group Means	IMPRHR2_Group_Means_R20231006_I20231006	01/01/89 - 01/01/22	212	21	482,454
10/06/2023	IMPROVE RHR2 Metrics	IMPRHR2_Daily_Budgets_R20231006_I20231006	03/02/88 - 12/31/22	232	26	13,712,556
10/06/2023	IMPROVE Aerosol	IMPAER_UCD_2022_Full_Year_Redelivery_R20231005_I20231006	01/02/22 - 12/31/22	158	99	2,056,165
09/28/2023	IMPROVE Aerosol	IMPAER_UCD_202212_R20230908_I20230928	12/01/22 - 12/31/22	158	99	185,599
09/18/2023	EPA CSN	EPACSN_2021_2023p_R20230918_I20230918_STEP2	01/01/21 - 07/30/23	148	94	2,170,777
08/25/2023	IMPROVE Aerosol	IMPAER_UCD_202211_R20230824_I20230825	11/01/22 - 11/28/22	158	99	169,210
08/11/2023	EPA CSN	EPACSN_2021_2023p_R20230811_I20230811_STEP2	01/01/21 - 06/29/23	148	94	2,085,719
08/11/2023	IMPROVE Aerosol Preliminary	IMPAERPRE_UCD_202211_202306_R20230808_I20230811	11/01/22 - 06/29/23	158	99	586,855
07/25/2023	IMPROVE Aerosol	IMPAER_UCD_202210_R20230721_I20230725	10/02/22 - 10/29/22	158	99	169,210
07/17/2023	EPA CSN	EPACSN_2021_2023p_R20230717_I20230717_STEP2	01/01/21 - 05/30/23	148	94	2,016,160
06/28/2023	IMPROVE Nephelometer	IMPNEPH_ARS_202301_202303_R20230623_I20230628	01/01/23 - 03/31/23	10	4	86,400
06/28/2023	IMPROVE Aerosol	IMPAER_UCD_202209_R20230627_I20230628	09/02/22 - 09/29/22	158	99	169,210
06/01/2023	IMPROVE Aerosol Preliminary	IMPAERPRE_UCD_202209_202304_R20230601_I20230601	09/02/22 - 04/30/23	158	99	464,448
06/01/2023	IMPROVE Aerosol	IMPAER_UCD_202208_R20230531_I20230601	08/03/22 - 08/30/22	158	99	169,000
05/22/2023	EPA CSN	EPACSN_2021_2022p_R20230522_I20230522_STEP2	01/01/21 - 12/31/22	147	94	1,854,564
05/02/2023	IMPROVE Aerosol Preliminary	IMPAERPRE_UCD_202208_202303_R20230501_I20230501	08/03/22 - 03/31/23	158	98	466,244
05/01/2023	IMPROVE Aerosol	IMPAER_UCD_202207_R20230501_I20230501	07/01/22 - 07/31/22	157	98	183,205
04/28/2023	CASTNet Ozone - Hourly	CASTOZONEH_1987_2023p_R20230428_I20230428_STEP1	01/01/87 - 04/26/23	137	1	24,494,375
04/10/2023	EPA CSN	EPACSN_2021_2022p_R20230407_I20230410_STEP2	01/01/21 - 12/31/22	147	94	1,764,651
04/07/2023	EPA Coarse Mass (86101) - Daily	EPAPMCMD_86101_Daily_2005_2023p_R20230407_I20230407_STEP1	01/01/05 - 02/26/23	276	1	385,059
04/07/2023	EPA PM10 Mass (81102) - Daily	EPAPM10MD_81102_Daily_1982_2023p_R20230407_I20230407_STEP1	08/21/82 - 02/28/23	3243	1	2,963,209
04/06/2023	EPA PM2.5 Mass (88502) - Daily	EPAPM25MD_88502_Daily_1988_2023p_R20230406_I20230406_STEP1	03/02/88 - 02/23/23	622	1	695,890
04/06/2023	EPA PM2.5 Mass FRM (88101) - Daily	AQSFRM_88101_Daily_1997_2023p_R20230406_I20230406_STEP2	04/04/97 - 02/28/23	1822	1	2,867,706
04/05/2023	IMPROVE Aerosol	IMPAER_UCD_202206_R20230405_I20230405	06/01/22 - 06/28/22	157	98	166,550
04/03/2023	IMPROVE Aerosol Preliminary	IMPAERPRE_UCD_202207_202302_R20230403_I20230403	07/01/22 - 02/26/23	158	99	484,947
03/29/2023	IMPROVE Nephelometer	IMPNEP_ARS_20221001_20221231_R20230329_I20230329	10/01/22 - 12/31/22	10	4	88,320
03/29/2023	IMPROVE Aerosol	IMPAER_UCD_202205_R20230324_I20230329	05/02/22 - 05/29/22	157	98	166,550
03/09/2023	EPA CSN	EPACSN_2021_2022p_R20230309_I20230309_STEP2	01/01/21 - 12/31/22	147	94	1,691,373
03/06/2023	CASTNet DryChem	CASTDRYCHEM_ALL_R20230306_I20230306	01/13/87 - 11/30/22	131	16	2,338,160
03/06/2023	NADP AMoN	NADP_AMoN_ALL_R20230306_I20230306	10/29/07 - 10/20/22	128	2	89,562
03/03/2023	NADP MDN	NADP_MDN_ALL_R20230303_I20230303	03/05/96 - 07/27/22	199	5	577,795
03/03/2023	NADP NTN - Weekly Concentrations	NADP_NTN_ALL_Weekly_R20230303_I20230303	07/11/78 - 02/23/22	387	13	6,023,550
03/01/2023	IMPROVE Aerosol Preliminary	IMPAERPRE_UCD_202205_202301_R20230301_I20230301	05/02/22 - 01/30/23	158	99	611,864
03/01/2023	IMPROVE Aerosol	IMPAER_UCD_202204_R20230301_I20230301	04/02/22 - 04/29/22	157	98	166,550
02/13/2023	EPA CSN	EPACSN_2021_2022p_R20230213_I20230213_STEP2	01/01/21 - 12/31/22	147	94	1,615,202
02/13/2023	IMPROVE Nephelometer	IMPNEPH_ARS_20220701_20220930_R20221221_I20230213	07/01/22 - 09/30/22	10	4	88,320
02/13/2023	IMPROVE Nephelometer	IMPNEPH_ARS_20220401_20220630_R20220928_I20230213	04/01/22 - 06/30/22	10	4	87,360
02/13/2023	IMPROVE Nephelometer	IMPNEPH_ARS_20220101_20220331_R20220627_I20230213	01/01/22 - 03/31/22	10	4	86,400
02/10/2023	IMPROVE RHR3 Group Means	IMPRHR3_Group_Means_VICE_Recovery_I20230210	01/01/89 - 01/01/21	181	34	733,788
02/10/2023	IMPROVE RHR3 Metrics	IMPRHR3_Daily_Budgets_VICE_Recovery_I20230210	01/04/89 - 12/30/21	195	58	23,517,376
02/10/2023	IMPROVE RHR2 Group Means	IMPRHR2_Group_Means_VICE_Recovery_I20230210	01/01/89 - 01/01/21	212	21	464,310
02/10/2023	IMPROVE RHR2 Metrics	IMPRHR2_Daily_Budgets_VICE_Recovery_I20230210	03/02/88 - 12/30/21	232	26	13,207,038
02/10/2023	IMPROVE Aerosol Preliminary	IMPAERPRE_UCD_202203_202212_VICE_Recovery_I20230210	03/03/22 - 12/31/22	158	99	743,175
02/10/2023	IMPROVE Aerosol	IMPAER_UCD_2022_Jan_Mar_VICE_Recovery_I20230210	01/02/22 - 03/30/22	157	99	502,870
02/09/2023	IMPROVE Aerosol	IMPAER_UCD_2021_Redelivery_R20221118_I20230209	01/01/21 - 12/30/21	161	99	2,071,642
02/09/2023	IMPROVE Aerosol	IMPAER_UCD_2021_Full_Year_VICE_Recovery_I20230209	01/01/21 - 12/30/21	162	99	2,083,283
06/13/2022	IMPROVE Aerosol	IMPAER_UCD_202106_R20220610_I20220613	06/03/21 - 06/30/21	160	99	170,995
06/13/2022	EPA CSN	EPACSN_2021_R20220613_I20220613_STEP2	01/01/21 - 12/30/21	144	89	955,644
06/02/2022	IMPROVE Aerosol Preliminary	IMPAERPRE_UCD_202106_202204_R20220601_I20220601	06/01/21 - 04/29/22	161	99	1,147,645
05/16/2022	EPA CSN	EPACSN_2021_R20220516_I20220516_STEP2	01/01/21 - 12/30/21	144	89	878,391
05/16/2022	IMPROVE Aerosol	IMPAER_UCD_202105_R20220513_I20220516	05/01/21 - 05/31/21	160	99	187,916
04/20/2022	IMPROVE Aerosol	IMPAER_UCD_Apr_2021_R20220419_I20220420	04/01/21 - 04/29/21	160	99	171,301
04/14/2022	EPA CSN	EPACSN_2021_R20220414_I20220414_STEP2	01/01/21 - 12/30/21	144	89	802,599
04/11/2022	IMPROVE Nephelometer	IMPNEPH_ARS_20211001_20211231_R20220330_I20220411	10/01/21 - 12/31/21	10	4	88,320
04/11/2022	IMPROVE Nephelometer	IMPNEPH_ARS_20210701_20210930_R20211221_I20220411	07/01/21 - 09/30/21	11	4	97,152
04/11/2022	IMPROVE Nephelometer	IMPNEPH_ARS_20210401_20210630_R20210917_I20220411	04/01/21 - 06/30/21	11	4	96,040
04/11/2022	IMPROVE Aerosol	IMPAER_UCD_Mar_2021_R20220405_I20220411	03/02/21 - 03/30/21	161	99	172,096
03/29/2022	CASTNET Dry Deposition - Annual	CASTNET_DRYDEP_ANNUAL_R20220328_I20220328	01/01/87 - 01/01/21	107	10	23,550
03/28/2022	NADP NTN - Annual PWM (ueq/L)	NADP_NTN_PWM_ANNUAL_UEQL_ALL_R20220328_I20220328	01/01/78 - 01/01/20	384	12	108,444
03/15/2022	IMPROVE Aerosol Preliminary	IMPAERPRE_UCD_202103_202201_R20220315_I20220315	03/01/21 - 01/29/22	164	99	1,117,580
03/15/2022	EPA CSN	EPACSN_2021_R20220315_I20220315_STEP2	01/01/21 - 12/30/21	144	89	716,218
02/26/2022	IMPROVE Aerosol	IMPAER_UCD_Jan_Feb_2021_R20220225_I20220226	01/01/21 - 02/28/21	161	99	344,720
02/15/2022	IMPROVE Aerosol Preliminary	IMPAERPRE_UCD_2021_R20220215_I20220215	01/01/21 - 12/30/21	164	99	1,270,337
02/08/2022	IMPROVE RHR3 Group Means	IMPRHR3_Group_Means_R20220207_I20220208	01/01/89 - 01/01/20	176	34	698,088
02/08/2022	IMPROVE RHR3 Metrics	IMPRHR3_Daily_Budgets_R20220207_I20220208	01/04/89 - 12/29/20	189	58	22,390,668
02/07/2022	IMPROVE RHR2 Group Means	IMPRHR2_Group_Means_R20220207_I20220207	01/01/89 - 01/01/20	209	21	443,772
02/07/2022	IMPROVE RHR2 Metrics	IMPRHR2_Daily_Budgets_R20220207_I20220207	03/02/88 - 12/30/20	230	26	12,628,616
02/07/2022	EPA CSN	EPACSN_2021_R20220207_I20220207_STEP2	01/01/21 - 11/30/21	144	89	637,894
02/02/2022	IMPROVE Aerosol	IMPAER_UCD_2020_Redelivery_R20220131_I20220202	01/01/20 - 12/30/20	161	99	2,088,061
01/10/2022	EPA CSN	EPACSN_2021_R20220110_I20220110_STEP2	01/01/21 - 10/31/21	144	89	555,497
12/30/2021	IMPROVE Aerosol	IMPAER_UCD_202012_R20211229_I20211230	12/02/20 - 12/30/20	161	99	172,360
12/20/2021	GEOS-Chem MERRA v9-02	GEOS_CHEM_MERRA_SITE_AER_R20210429_I20211220	01/01/04 - 12/31/12	171	7	3,935,736
12/15/2021	EPA CSN	EPACSN_2021_R20211215_I20211215_STEP2	01/01/21 - 09/26/21	144	89	477,382
12/10/2021	IMPROVE Aerosol	IMPAER_UCD_202011_R202111210_I202111210	11/02/20 - 11/30/20	161	99	172,360
12/04/2021	EPA CO (42101) - Hourly	EPACOH_1980_2021p_R20211203_I20211203	01/01/80 - 10/31/21	1622	1	139,056,124
12/03/2021	EPA SO2 (42401) - Hourly	EPASO2H_1989_2021p_R20211202_I20211202	01/01/89 - 10/31/21	1732	1	149,617,242
12/02/2021	EPA PM10 Mass (81102) - Hourly	EPAPM10MH_1988_2021_R20211130_I20211130	01/01/89 - 10/31/21	754	1	51,284,329
12/01/2021	EPA PM10 Mass (81102) - Daily	EPAPM10MD_1981_2021_R20211130_I20211130_STEP1	08/21/82 - 10/31/21	3199	1	2,883,948
11/30/2021	EPA CSN	EPACSN_2021_R20211130_I20211130_STEP2	01/01/21 - 09/26/21	144	89	399,115
11/05/2021	IMPROVE Aerosol	IMPAER_UCD_202010_R20211105_I20211105	10/01/20 - 10/31/20	161	99	172,465
11/05/2021	IMPROVE Aerosol	IMPAER_UCD_202009_R20210921_I20211105	09/01/20 - 09/30/20	161	99	172,360
11/04/2021	EPA Ozone (O3) (44201) - Hourly	EPAOZONEH_1985_1989_R20211026_I20211104_STEP2	01/01/85 - 12/31/89	1001	1	24,586,276
11/04/2021	EPA Ozone (O3) (44201) - Hourly	EPAOZONEH_1990_1994_R20211026_I20211104_STEP2	01/01/90 - 12/31/94	1238	1	31,608,496
10/29/2021	EPA Ozone (O3) (44201) - Hourly	EPAOZONEH_1995_1999_R20211026_I20211028_STEP2	01/01/95 - 12/31/99	1343	1	35,263,143
10/29/2021	EPA Ozone (O3) (44201) - Hourly	EPAOZONEH_2000_2004_R20211026_I20211028_STEP2	01/01/00 - 12/31/04	1443	1	40,137,655
10/29/2021	EPA Ozone (O3) (44201) - Hourly	EPAOZONEH_2005_2009_R20211026_I20211028_STEP2	01/01/05 - 12/31/09	1474	1	42,168,747
10/28/2021	EPA Ozone (O3) (44201) - Hourly	EPAOZONEH_2010_2014_R20211026_I20211028_STEP2	01/01/10 - 12/31/14	1476	1	44,997,308
10/28/2021	EPA Ozone (O3) (44201) - Hourly	EPAOZONEH_2015_R20211026_I20211028_STEP2	01/01/15 - 12/31/15	1293	1	9,003,963
10/28/2021	EPA Ozone (O3) (44201) - Hourly	EPAOZONEH_2016_R20211026_I20211028_STEP2	01/01/16 - 12/31/16	1283	1	9,166,658
10/28/2021	EPA Ozone (O3) (44201) - Hourly	EPAOZONEH_2017_R20211026_I20211028_STEP2	01/01/17 - 12/31/17	1283	1	9,434,844
10/28/2021	EPA Ozone (O3) (44201) - Hourly	EPAOZONEH_2018_R20211026_I20211028_STEP2	01/01/18 - 12/31/18	1276	1	9,446,012
10/28/2021	EPA Ozone (O3) (44201) - Hourly	EPAOZONEH_2019_R20211026_I20211028_STEP2	01/01/19 - 12/31/19	1241	1	9,142,786
10/28/2021	EPA Ozone (O3) (44201) - Hourly	EPAOZONEH_2020_2021p_R20211026_I20211026_STEP3	01/01/20 - 09/30/21	1251	1	14,374,317
10/21/2021	NADP AIRMoN	NADP_AIRMoN_ALL_R20211020_I20211020	09/23/92 - 08/28/19	12	17	498,712
10/20/2021	NADP AMoN	NADP_AMoN_ALL_R20211020_I20211020	12/12/12 - 02/09/21	128	2	80,704
10/19/2021	NADP MDN	NADP_MDN_ALL_R20211019_I20211019	03/05/96 - 01/27/21	196	5	547,985
10/15/2021	NADP NTN - Annual PWM (mg/L)	NADP_NTN_PWM_ALL_R20211014_I20211014	01/01/78 - 01/01/20	384	13	117,481
10/15/2021	NADP NTN - Total Wet Deposition	NADP_NTN_TWD_ALL_R20211014_I20211014	01/01/78 - 01/01/20	384	13	117,481
10/14/2021	NADP NTN - Weekly Concentrations	NADP_NTN_ALL_R20211013_I20211013	07/11/78 - 11/24/21	385	14	6,370,672
10/13/2021	EPA CSN	EPACSN_2021_R20211013_I20211013_STEP1	01/01/21 - 08/26/21	144	91	318,110
10/12/2021	IMPROVE Nephelometer	IMPNEPH_ARS_20210101_20210331_R20210614_I20211012	01/01/21 - 03/31/21	11	4	95,040
10/12/2021	IMPROVE Nephelometer	IMPNEPH_ARS_20201001_20201231_R20210330_I20211012	10/01/20 - 12/31/20	11	4	97,152
09/03/2021	IMPROVE Aerosol	IMPAER_UCD_202008_R20210902_I20210903	08/01/20 - 08/31/20	161	99	189,460
06/29/2021	IMPROVE Aerosol	IMPAER_UCD_202006_202007_R20210629_I20210629	06/02/20 - 07/30/20	161	99	340,730
06/29/2021	IMPROVE Aerosol	IMPAER_UCD_202005_R20210419_I20210421	05/03/20 - 05/30/20	159	99	170,260
06/14/2021	EPA CSN	EPACSN_2016_2021_R20210614_I20210614_STEP1	01/01/16 - 04/28/21	168	112	4,968,846
06/14/2021	EPA CSN	EPACSN_2010_2015_R20210614_I20210614_STEP1	01/01/10 - 12/31/15	224	109	5,302,337
06/14/2021	EPA CSN	EPACSN_2000_2009_R20210614_I20210614_STEP1	01/02/00 - 12/31/09	337	256	9,352,800
05/17/2021	IMPROVE RHR2 Group Means	HALE1_HAVO1_TSS_Gantt_Adj_RHR2_Group_Means_R20210406_I20210514	01/01/01 - 01/01/19	3	21	6,804
05/17/2021	IMPROVE RHR3 Group Means	HALE1_HAVO1_TSS_Gantt_Adj_RHR3_Group_Means_R20210406_I20210514	01/01/01 - 01/01/19	3	35	11,340
04/29/2021	IMPROVE RHR2 Group Means	IMPRHR2_Group_Means_R20201208_I20210121	01/01/89 - 01/01/19	206	21	427,014
04/29/2021	IMPROVE RHR2 Metrics	IMPRHR2_Daily_Budgets_R20201208_I20210121	03/02/88 - 12/29/19	228	26	12,118,392
04/29/2021	IMPROVE RHR3 Group Means	IMPRHR3_Group_Means_R20201208_I20210121	01/01/89 - 01/01/19	176	34	673,200
04/27/2021	IMPROVE RHR3 Metrics	IMPRHR3_Daily_Budgets_R20201208_I20210121	01/04/89 - 12/29/19	189	58	21,561,964
04/05/2021	IMPROVE Aerosol	IMPAER_UCD_202004_R20210305_I20210326	04/03/20 - 04/30/20	159	99	170,260
02/25/2021	CASTNet DryChem	CASTNET_DRYCHEM_ALL_R20210224_I20210224	01/13/87 - 11/30/20	131	16	2,189,520
02/23/2021	EPA PM2.5 Mass (88502) - Daily	AQSPM25_Daily_88502_2000_2021p_R20210220_I20210222	01/01/00 - 08/31/20	589	1	588,167
02/23/2021	EPA PM2.5 Mass (88502) - Hourly	AQSPM25_Hourly_88502_2000_2021p_R20210220_I20210222	01/01/00 - 01/31/21	854	1	54,592,209
02/22/2021	EPA PM2.5 Mass FRM (88101) - Daily	AQSFRM_Hourly_88101_2000_2021p_R20210220_I20210222	03/15/08 - 01/31/21	833	1	36,921,310
02/22/2021	EPA PM2.5 Mass FRM (88101) - Daily	AQSFRM_Daily_88101_2000_2021p_R20210220_I20210222	01/01/00 - 01/03/21	1779	1	2,617,078
01/20/2021	IMPROVE Aerosol	IMPAER_UCD_202003_R20201217_I20210120	03/01/20 - 03/31/20	159	99	187,286
01/20/2021	IMPROVE Aerosol	IMPAER_UCD_2019_R20201208_I20210120	01/03/19 - 12/29/19	160	99	2,059,485
01/20/2021	IMPROVE Aerosol	IMPAER_UCD_202002_R20201021_I20210120	02/03/20 - 02/27/20	159	99	153,234
01/05/2021	IMPROVE Nephelometer	IMPNEP_ARS_20200701_20200930_R20201230_I20210105	07/01/20 - 09/30/20	11	4	97,152
10/05/2020	IMPROVE Nephelometer	IMPNEP_ARS_20200401_20200630_R20200929_I20201005	04/01/20 - 06/30/20	11	4	96,096
09/10/2020	IMPROVE Aerosol	IMPAER_UCD_201912_202001_R20200909_I20200910	12/02/19 - 01/31/20	160	99	358,575
06/30/2020	IMPROVE Nephelometer	IMPNEP_ARS_20200101_20200331_R20200630_I20200630	01/01/20 - 03/31/20	11	4	96,096
05/28/2020	IMPROVE RHR2 Metrics	IMPRHR2_Group_Means_R20200423_I20200528	01/01/89 - 01/01/18	204	21	408,744
05/28/2020	IMPROVE RHR3 Metrics	IMPRHR3_Group_Means_R20200423_I20200528	01/01/89 - 01/01/18	176	34	645,252
05/28/2020	IMPROVE RHR2 Metrics	IMPRHR2_Daily_Budgets_Full_Record_R20200423_I20200513	03/02/88 - 12/31/18	227	25	11,167,550
05/27/2020	IMPROVE Natural Conditions (2064)	IMPRHR2_Natural_Conditions_R20200430_I20200527	01/01/64 - 01/01/64	189	17	12,852
05/27/2020	IMPROVE RHR3 Endpoints (2064)	IMPRHR3_Endpoints_R20200423_I20200526	01/01/64 - 01/01/64	204	20	4,080
05/24/2020	IMPROVE RHR3 Metrics	IMPRHR3_Daily_Budgets_Full_Record_R20200423_I20200511	01/04/89 - 12/31/18	189	58	20,676,652
03/31/2020	IMPROVE Nephelometer	IMPNEP_ARS_20191001_20191231_R20200331	10/01/19 - 12/31/19	11	4	97,152
03/31/2020	IMPROVE Nephelometer	IMPNEP_ARS_20190701_20190930_R20191224	07/01/19 - 09/30/19	11	4	97,152
10/22/2019	IMPROVE Aerosol	INAPM25_UCD_Aug_Dec_2017_R20191021	08/02/17 - 12/30/17	158	99	856,686
10/17/2019	IMPROVE Aerosol	INAPM25_UCD_Jan_Dec_2018_R20191009	01/02/18 - 12/31/18	159	99	2,024,849
09/30/2019	IMPROVE Nephelometer	IMPNEP_ARS_20190430_20190630_R20190927	04/01/19 - 06/30/19	11	4	96,096
07/30/2019	IMPROVE Nephelometer	IMPNEP_ARS_20190101_20190331_R20190627	01/01/19 - 03/31/19	11	4	95,040
03/29/2019	IMPROVE Nephelometer	IMPNEP_ARS_20181001_20181231_R20190329	10/01/18 - 12/31/18	11	4	97,152
01/02/2019	IMPROVE Nephelometer	IMPNEP_ARS_20180701_20180930_R20181227	07/01/18 - 09/30/18	11	4	97,152
12/14/2018	IMPROVE Nephelometer	IMPNEP_ARS_20180401_20180630_R20180927	04/01/18 - 06/30/18	12	4	104,832
12/14/2018	IMPROVE Nephelometer	IMPNEP_ARS_20180101_20180331_R20180627	01/01/18 - 03/31/18	12	4	103,680
12/14/2018	IMPROVE Nephelometer	IMPNEP_ARS_20171001_20171231_R20180328	10/01/17 - 12/31/17	12	4	105,984
11/11/2018	IMPROVE Aerosol	INAPM25_UCD_Dec_2017_R20181015	12/03/17 - 12/30/17	157	99	166,310
11/11/2018	IMPROVE Aerosol	INAPM25_UCD_Jan_Dec_2017_R20181012	01/01/17 - 12/31/17	159	99	2,042,243
04/06/2018	IMPROVE RHR3 Group Means	IMPAERCALC_CIRA_2011_201704_P20180405	01/03/11 - 04/28/17	181	10	1,394,970
03/30/2018	IMPROVE Aerosol	INAPM25_UCD_201606_201609_Update_R20180314	06/02/16 - 09/30/16	156	99	669,943
03/30/2018	IMPROVE Aerosol	INAPM25_UCD_201511_201701_Update_R20180309	11/02/15 - 01/31/17	163	99	1,369,942
02/27/2018	IMPROVE Aerosol	INAPM25_UCD_201508_201702_R20180223	08/01/15 - 02/27/17	168	99	2,833,403
12/28/2017	IMPROVE Nephelometer	IMPNEP_ARS_20170701_20170930_R20171227	04/01/17 - 09/30/17	12	4	114,720
09/29/2017	IMPROVE Nephelometer	IMPNEP_ARS_20170401_20170630_R20170927	04/01/17 - 06/30/17	12	4	104,832
06/29/2017	IMPROVE Nephelometer	IMPNEP_ARS_20170101_20170331_R20170628	01/01/17 - 03/31/17	12	4	103,680
05/24/2017	IMPROVE RHR3 Group Means	IMPAERCALC_ALL_20170524	03/02/88 - 05/30/16	226	10	4,346,030
03/30/2017	IMPROVE Nephelometer	IMPNEP_ARS_20161001_20161231_R20170330	10/01/16 - 12/31/16	12	4	105,984
12/29/2016	IMPROVE Nephelometer	IMPNEP_ARS_20160701_20160930_R20161229	07/01/16 - 09/30/16	12	4	105,984
09/29/2016	IMPROVE Nephelometer	IMPNEP_ARS_20160401_20160630_R20160929	04/01/16 - 06/30/16	15	4	131,040
07/06/2016	IMPROVE Nephelometer	IMPNEP_ARS_20160101_20160331_R20160629	01/01/16 - 03/31/16	15	4	131,040
07/06/2016	IMPROVE Nephelometer	IMPNEP_ARS_20151001_20151231_R20160329	10/01/15 - 12/31/15	15	4	132,480
07/06/2016	IMPROVE Nephelometer	IMPNEP_ARS_20150701_20150930_R20151229	07/01/15 - 09/30/15	15	4	132,480
05/17/2016	IMPROVE Aerosol	INAPM25_UCD_201507_201509	07/02/15 - 09/30/15	167	51	279,888
02/22/2016	IMPROVE Aerosol	INAPM25_UCD_201504_201506_R20160218	04/03/15 - 06/29/15	168	51	273,513
02/22/2016	IMPROVE Aerosol	INAPM25_UCD_201302_201503_R20160218	02/03/13 - 03/31/15	172	51	2,420,919
10/05/2015	IMPROVE Nephelometer	IMPNEP_ARS_20150401_20150630_R20150928	04/01/15 - 06/30/15	15	4	131,040
09/17/2015	IMPROVE Aerosol	INAPM25_UCD_FABS_2003_2004_R20150909	01/03/03 - 12/29/04	180	51	2,249,865
07/07/2015	IMPROVE Nephelometer	IMPNEP_ARS_20150101_20150331_R20150629	01/01/15 - 03/31/15	15	4	129,600
05/05/2015	IMPROVE Aerosol	INAPM25_UCD_200501_201405_Resubmission	01/01/05 - 05/29/14	200	51	11,272,887
04/02/2015	IMPROVE Nephelometer	IMPNEP_ARS_20141001_20141231_R20150331	10/01/14 - 12/31/14	15	4	132,480
12/29/2014	IMPROVE Nephelometer	IMPNEP_ARS_20140701_20140930_R20141223	07/01/14 - 09/30/14	15	4	132,480
12/29/2014	IMPROVE Nephelometer	IMPNEP_ARS_20140401_20140630_R20140929	04/01/14 - 06/30/14	15	4	131,040
07/10/2014	IMPROVE Nephelometer	IMPNEP_ARS_20140101_20140331_R20140624	01/01/14 - 03/31/14	15	4	129,600
05/12/2014	IMPROVE Nephelometer	IMPNEP_ARS_20131001_20131231_R20140327	10/01/13 - 12/31/13	15	4	132,480
03/12/2014	IMPROVE Nephelometer	IMPNEP_ARS_20130701_20130930_R20131224	01/01/13 - 09/30/13	16	4	158,688
10/07/2013	IMPROVE Nephelometer	IMPNEP_ARS_20130401_20130630_R20130925	04/01/13 - 06/30/13	16	4	139,776
07/02/2013	IMPROVE Nephelometer	IMPNEP_ARS_20130101_20130331_R20130626	01/01/13 - 03/31/13	16	4	138,240
04/09/2013	IMPROVE Nephelometer	IMPNEP_ARS_20121001_20121231_R20130328	07/01/12 - 12/31/12	17	4	158,976
01/02/2013	IMPROVE Nephelometer	IMPNEP_ARS_20120701_20120930_R20121231	07/01/12 - 09/30/12	16	4	141,312
10/08/2012	IMPROVE Nephelometer	IMPNEP_ARS_20120401_20120630_R20120926	04/01/12 - 06/30/12	17	4	148,512
06/28/2012	IMPROVE Nephelometer	IMPNEP_ARS_20120101_20120331_R20120627	01/01/12 - 03/31/12	17	4	148,512
06/28/2012	IMPROVE Nephelometer	IMPNEP_ARS_20111001_20111231_R20120326	07/01/11 - 12/31/11	17	4	158,976
01/03/2012	IMPROVE Nephelometer	IMPNEP_ARS_20110701_20110930_R20111229	07/01/11 - 09/30/11	16	4	141,312
12/14/2011	IMPROVE Nephelometer	IMPNEP_ARS_20110401_20110630_R20110628	04/01/11 - 06/30/11	16	4	139,776
12/07/2011	IMPROVE Nephelometer	IMPNEP_ARS_20110101_20110331_R20110331	01/01/11 - 03/31/11	16	4	138,240
12/07/2011	IMPROVE Nephelometer	IMPNEP_ARS_20101001_20101231_R20110331	10/01/10 - 12/31/10	16	4	141,312
02/10/2011	IMPROVE Nephelometer	IMPNEP_ARS_20100701_20100930_R20110210	07/01/10 - 09/30/10	18	4	158,976
02/10/2011	IMPROVE Nephelometer	IMPNEP_ARS_20100401_20100630_R20110210	04/01/10 - 06/30/10	27	4	235,872
02/10/2011	IMPROVE Nephelometer	IMPNEP_ARS_20100101_20100331_R20110210	01/01/10 - 03/31/10	27	4	233,280
02/10/2011	IMPROVE Nephelometer	IMPNEP_ARS_20091001_20091231_R20110210	10/01/09 - 12/31/09	27	4	238,464
01/03/2011	IMPROVE Aerosol	INAPM25_UCD_200901_200912	01/01/09 - 12/30/09	174	51	1,209,261
04/13/2010	IMPROVE Nephelometer	IMPNEP_ARS_20090101_20090331_R20090701	01/01/09 - 03/31/09	31	4	267,840
04/13/2010	IMPROVE Nephelometer	IMPNEP_ARS_20090401_20090630_R20100322	04/01/09 - 06/30/09	31	4	270,816
04/13/2010	IMPROVE Nephelometer	IMPNEP_ARS_20090701_20090930_R20100322	07/01/09 - 09/30/09	30	4	264,960
11/23/2009	IMPROVE Aerosol	INAPM25_UCD_2005_Resubmission_R20091121	01/01/05 - 12/30/05	179	51	1,222,011
11/23/2009	IMPROVE Aerosol	INAPM25_UCD_2006_Resubmission_R20091121	01/02/06 - 12/31/06	173	51	1,204,518
11/23/2009	IMPROVE Aerosol	INAPM25_UCD_2007_Resubmission_R20091121	01/03/07 - 12/29/07	172	51	1,189,932
11/23/2009	IMPROVE Aerosol	INAPM25_UCD_2008_Resubmission_R20091121	01/01/08 - 12/29/08	172	51	1,205,079
04/20/2009	IMPROVE Nephelometer	IMPNEP_ARS_20081001_20081231_R20090406	10/01/08 - 12/31/08	31	4	273,792
01/16/2009	IMPROVE Nephelometer	IMPNEP_ARS_20080701_20080930_R20090114	07/01/08 - 09/30/08	31	4	273,792
09/30/2008	IMPROVE Nephelometer	IMPNEP_ARS_20080401_20080630_R20080929	04/01/08 - 06/30/08	31	4	270,816
09/30/2008	IMPROVE Nephelometer	IMPNEP_ARS_20080101_20080331_R20080701	01/01/08 - 03/31/08	31	4	270,816
04/15/2008	IMPROVE Aerosol	IMPAER_UCD_FABS_88_99_R20071031	03/02/88 - 02/26/00	98	1	72,680
04/09/2008	IMPROVE Nephelometer	IMPNEP_ARS_20071001_20071231_R20080408	10/01/97 - 12/31/07	32	4	343,488
01/02/2008	IMPROVE Nephelometer	IMPNEP_ARS_20070701_20070930_R20071220	07/01/07 - 09/30/07	31	4	273,792
10/09/2007	IMPROVE Nephelometer	IMPNEP_ARS_20070401_20070630_R20071009	04/01/07 - 06/30/07	31	4	270,816
08/31/2007	IMPROVE Nephelometer	IMPNEP_ARS_20070101_20070331_R20070627	01/01/07 - 03/31/07	32	4	276,480
07/17/2007	IMPROVE Nephelometer	IMPNEP_ARS_20060101_20060331_R20060401	01/01/06 - 03/31/06	38	4	328,320
07/17/2007	IMPROVE Nephelometer	IMPNEP_ARS_20051001_20051231_R20060401	10/01/05 - 12/31/05	38	4	335,616
05/01/2007	IMPROVE Nephelometer	IMPNEP_ARS_20061001_20061231_R20070412	10/01/06 - 12/31/06	34	4	300,288
10/06/2006	IMPROVE Aerosol	IMPAER_UCD_200502_R20061005	02/03/05 - 02/27/05	173	42	74,466
09/07/2005	IMPROVE Nephelometer	IMPNEP_ARS_19930101_20050331_R20050906	04/01/93 - 12/31/93	1	4	26,400