The Interagency Monitoring of Protected Visual Environments (IMPROVE) program is a cooperative measurement effort governed by a steering committee of representatives from Federal, state, and regional organizations. The IMPROVE monitoring program was established in 1985 to facilitate the creation of Federal and State implementation plans for the protection of visibility in Class I areas (156 national parks and wilderness areas) as stipulated by the 1977 amendments to the Clean Air Act.

IMPROVE Data Use: For journal publications, please inform Bret Schichtel (Bret.Schichtel@colostate.edu) of the planned publication. Drafts of publications will be reviewed upon request for issues that could affect the data interpretation. Preferred Reference: Please reference the Malm,et al. (1994) article below when using IMPROVE data. Malm, W. C., J. F. Sisler, D. Huffman, R. A. Eldred, and T. A. Cahill (1994), Spatial and seasonal trends in particle concentration and optical extinction in the United States, J. Geophys. Res., 99, 1347-1370. Preferred Acknowledgment: IMPROVE is a collaborative association of state, tribal, and federal agencies, and international partners. US Environmental Protection Agency is the primary funding source, with contracting and research support from the National Park Service. The Air Quality Group at the University of California, Davis is the central analytical laboratory, with ion analysis provided by Research Triangle Institute, and carbon analysis provided by Desert Research Institute. (Also: Prior to use, all data users are encouraged to review the IMPROVE data advisories located on the IMPROVE website.)
SiteCodeSiteNameCTSTEPACodeLatLonElevStartEnd
ACAD1Acadia NPUSME23009010344.38-68.2615709/01/2106/28/22
AGTI1Agua TibiaUSCA06065900033.46-116.9750809/10/2106/28/22
ATLA1South DekalbUSGA13089000233.69-84.2924309/01/2106/28/22
BADL1Badlands NPUSSD46071000143.74-101.9473609/01/2106/28/22
BALD1Mount BaldyUSAZ04001800134.06-109.44250909/01/2106/28/22
BAND1Bandelier NMUSNM35028100235.78-106.27198809/01/2106/28/22
BIBE1Big Bend NPUSTX48043010129.3-103.18106709/01/2106/28/22
BIRM1North BirminghamUSAL01073002333.55-86.8117609/01/2106/28/22
BLIS1Bliss SP (TRPA)USCA06017900038.98-120.1213109/10/2112/12/21
BLIS2Bliss SP (TRPA)USCA06017900238.98-120.1209212/18/2106/28/22
BOAP1Bosque del ApacheUSNM35053900033.87-106.85139009/01/2106/28/22
BOLA1Boulder LakeUSWY 42.85-109.64229609/01/2106/28/22
BOND1BondvilleUSIL17019100140.05-88.3726309/01/2106/28/22
BOWA1Boundary Waters Canoe AreaUSMN27075900047.95-91.552709/01/2106/28/22
BRCA1Bryce Canyon NPUSUT49017010137.62-112.17248109/01/2106/28/22
BRID1Bridger WildernessUSWY56035900042.97-109.76262709/01/2106/28/22
BRIG1Brigantine NWRUSNJ34001900039.47-74.45509/01/2106/28/22
BRIS1Breton IslandUSLA22075900030.11-89.76-709/01/2106/28/22
BYIS1Baengnyeong IslandKR  37.97124.6310009/01/2106/28/22
BYIS1Baengnyeong Island (#2)KR  37.97124.6310009/01/2106/28/22
CABA1Casco BayUSME23005900243.83-70.062709/01/2106/28/22
CABI1Cabinet MountainsUSMT30089900047.95-115.67144109/01/2106/28/22
CACO1Cape CodUSMA25001000241.98-70.024909/01/2106/28/22
CACR1Caney CreekUSAR05113000334.45-94.1468309/01/2106/28/22
CANY1Canyonlands NPUSUT49037900038.46-109.82179809/01/2106/28/22
CAPI1Capitol Reef NPUSUT49055900038.3-111.29189709/01/2106/28/22
CAVE1Carlsbad CavernsUSNM 32.18-104.44135509/01/2106/28/22
CEBL1Cedar BluffUSKS20195000138.77-99.7666609/01/2106/28/22
CHAS1Chassahowitzka NWRUSFL12017900028.75-82.55409/01/2106/28/22
CHIR1Chiricahua NMUSAZ04003800132.01-109.39155509/01/2106/28/22
COHU1CohuttaUSGA13213900034.79-84.6373509/04/2106/28/22
CORI1Columbia River GorgeUSWA53039001145.66-12117909/01/2106/28/22
CRLA1Crater Lake NPUSOR41035800142.9-122.14199609/01/2106/28/22
CRMO1Craters of the Moon NMUSID16023010143.46-113.56181809/01/2106/28/22
DENA1Denali NPUSAK02068000363.72-148.9765809/01/2106/28/22
DETR1DetroitUSMI26163000142.23-83.2118009/01/2106/28/22
DINO1Dinosaur NMUSCO 40.25-108.97182909/01/2106/28/22
DOME1Dome Lands WildernessUSCA06029900135.73-118.1492709/04/2106/28/22
DOSO1Dolly Sods WildernessUSWV54093900039.11-79.43118209/01/2106/28/22
EGBE1EgbertCAON 44.23-79.7825109/01/2106/28/22
EVER1Everglades NPUSFL12086003025.39-80.68109/01/2106/28/22
EVER1Everglades NP (#2)USFL12086003025.39-80.68109/01/2106/28/22
FCPC1Forest County Potawatomi CommunityUSWI55041000745.56-88.8156409/01/2106/28/22
FLAT1FlatheadUSMT30047900047.77-114.27158009/01/2106/28/22
FLTO1Flat TopsUSCO 39.92-107.63259309/01/2110/04/21
FOCO1Fort CollinsUSCO08069900240.59-105.14157209/01/2106/25/22
FOPE1Fort PeckUSMT30085900048.31-105.163809/01/2106/28/22
FRES1FresnoUSCA06019000836.78-119.7710009/01/2106/28/22
FRRE1Frostburg Reservoir (Big Piney Run)USMD24023900039.71-79.0176709/01/2106/28/22
FRRE1Frostburg Reservoir (Big Piney Run) (#2)USMD24023900039.71-79.0176709/01/2106/28/22
GAMO1Gates of the MountainsUSMT30049900046.83-111.71238709/01/2106/28/22
GICL1Gila WildernessUSNM35003900033.22-108.24177609/01/2106/28/22
GLAC1Glacier NPUSMT30029900148.51-11497509/01/2106/28/22
GRBA1Great Basin NPUSNV32033900039.01-114.22206609/01/2106/28/22
GRCA2Hance Camp at Grand Canyon NPUSAZ04005810235.97-111.98226709/01/2106/28/22
GRGU1Great Gulf WildernessUSNH33007400244.31-71.2245409/01/2106/28/22
GRRI1Great River BluffsUSMN27169900043.94-91.4137009/01/2106/28/22
GRSA1Great Sand Dunes NMUSCO08003900037.72-105.52249809/01/2106/28/22
GRSM1Great Smoky Mountains NPUSTN47009010135.63-83.9481109/01/2106/28/22
GUMO1Guadalupe Mountains NPUSTX48109900031.83-104.81167209/01/2106/28/22
HACR1Haleakala CraterUSHI 20.76-156.25215809/01/2106/28/22
HAVO1Hawaii Volcanoes NPUSHI15001900219.43-155.26125909/01/2106/28/22
HECA1Hells CanyonUSOR41063000244.97-116.8465509/04/2106/28/22
HEGL1Hercules-GladesUSMO29213000336.61-92.9240409/01/2106/28/22
HEGL1Hercules-Glades (#2)USMO29213000336.61-92.9240409/01/2106/28/22
HOOV1HooverUSCA06051900038.09-119.18256109/01/2106/28/22
IKBA1Ike's BackboneUSAZ04025810434.34-111.68129809/01/2106/28/22
ISLE1Isle Royale NPUSMI26083900047.46-88.1518209/01/2106/28/22
JARB1Jarbidge WildernessUSNV32007900041.89-115.43186909/01/2106/28/22
JARI1James River Face WildernessUSVA51163900037.63-79.5129009/01/2106/28/22
JOSH1Joshua Tree NPUSCA06071900234.07-116.39123509/01/2106/28/22
KAIS1KaiserUSCA06019900037.22-119.15259809/01/2106/28/22
KALM1KalmiopsisUSOR41033001042.55-124.068009/01/2106/28/22
KPBO1Kenai Peninsula BoroughUSAK 60.01-151.71509/01/2106/28/22
LABE1Lava Beds NMUSCA06093000541.71-121.51146009/01/2106/28/22
LASU2Lake SugemaUSIA 40.69-92.0122909/01/2106/28/22
LAVO1Lassen Volcanic NPUSCA06089300340.54-121.58173309/01/2106/28/22
LIGO1Linville GorgeUSNC37011000235.97-81.9396909/01/2106/28/22
LOND1LondonderryUSNH 42.86-71.3812409/01/2106/28/22
LOST1LostwoodUSND38013000448.64-102.469609/01/2106/28/22
LTCC1Lake Tahoe Community CollegeUSCA 38.92-119.98193509/13/2106/28/22
LYEB1Lye Brook WildernessUSVT50025800142.96-72.9188209/01/2106/28/22
MACA1Mammoth Cave NPUSKY21061900037.13-86.1523509/01/2106/28/22
MACA1Mammoth Cave NP (#2)USKY21061900037.13-86.1523509/01/2106/28/22
MAKA2Makah Tribe Site #2USWA 48.3-124.6248009/01/2106/28/22
MAVI1Martha's VineyardUSMA25007000141.33-70.78309/01/2106/28/22
MELA1Medicine LakeUSMT30091900048.49-104.4860609/01/2106/28/22
MELA1Medicine Lake (#2)USMT30091900048.49-104.4860609/01/2106/28/22
MEVE1Mesa Verde NPUSCO08083900037.2-108.49217209/01/2106/28/22
MEVE1Mesa Verde NP (#2)USCO08083900037.2-108.49217209/01/2106/28/22
MING1MingoUSMO29207000136.97-90.1411109/01/2106/28/22
MOHO1Mount HoodUSOR41005001045.29-121.78153109/01/2106/28/22
MOMO1Mohawk Mt.USCT09005000541.82-73.352209/01/2106/28/22
MONT1MontureUSMT30077900047.12-113.15128209/01/2106/28/22
MOOS1Moosehorn NWRUSME23029100445.13-67.277809/01/2106/28/22
MORA1Mount Rainier NPUSWA53053001446.76-122.1243909/01/2106/28/22
MOZI1Mount Zirkel WildernessUSCO08057900040.54-106.68324309/01/2106/28/22
NEBR1Nebraska NFUSNE31171900041.89-100.3488309/01/2106/28/22
NOAB1North AbsarokaUSWY56029900244.74-109.38248309/01/2106/28/22
NOCA1North CascadesUSWA53073002248.73-121.0656909/01/2106/28/22
NOCH1Northern CheyenneUSMT30087076245.65-106.56128309/01/2106/28/22
NOGA1NogalesUSAZ 31.34-110.94117209/01/2106/28/22
OKEF1Okefenokee NWRUSGA13049900030.74-82.134809/01/2106/28/22
OLYM1OlympicUSWA53009002048.01-122.9760009/01/2106/28/22
ORPI1Organ PipeUSAZ04019000531.95-112.850409/01/2106/28/22
OWVL1Owens ValleyUSCA 37.36-118.33123409/01/2106/28/22
PACK1Pack Monadnock SummitUSNH 42.86-71.8869509/01/2106/28/22
PASA1PasaytenUSWA53047001248.39-119.93162709/01/2106/28/22
PEFO1Petrified Forest NPUSAZ04017011935.08-109.77176609/04/2106/28/22
PENO1PenobscotUSME 44.95-68.654509/01/2106/28/22
PHOE1PhoenixUSAZ04013999733.5-112.134209/01/2106/28/22
PHOE5Phoenix Colocated Sampler (#2)USAZ 33.5-112.134209/01/2106/28/22
PINN1Pinnacles NMUSCA06069000336.48-121.1630209/04/2106/28/22
PITT1LawrencevilleUSPA42003000840.47-79.9626809/01/2106/28/22
PMRF1Proctor Maple R. F.USVT50007000744.53-72.8740109/01/2106/28/22
PMRF1Proctor Maple R. F. (#2)USVT50007000744.53-72.8740109/01/2106/28/22
PORE1Point Reyes National SeashoreUSCA06041000238.12-122.919709/01/2106/28/22
PRIS1Presque IsleUSME23003102046.7-68.0316609/01/2106/28/22
PUSO1Puget SoundUSWA53033008047.57-122.319809/01/2106/28/22
QUCI1Quaker CityUSOH39121900039.94-81.3436609/01/2106/28/22
RAFA1San RafaelUSCA06083900034.73-120.0195709/01/2106/28/22
REDW1Redwood NPUSCA06015000241.56-124.0824409/01/2106/28/22
ROMA1Cape Romain NWRUSSC45019004632.94-79.66509/01/2106/28/22
ROMO1Rocky Mountain NPUSCO08069900140.28-105.55276009/01/2106/28/22
SACR1Salt CreekUSNM35005900033.46-104.4107209/01/2106/28/22
SAGA1San GabrielUSCA06037903434.3-118.03179109/13/2106/28/22
SAGA1San Gabriel (#2)USCA06037903434.3-118.03179109/13/2106/28/22
SAGO1San Gorgonio WildernessUSCA06071901034.19-116.91172609/01/2106/28/22
SAGU1Saguaro NMUSAZ04019002132.17-110.7494109/01/2106/28/22
SAMA1St. MarksUSFL12129000130.09-84.16809/01/2106/28/22
SAMA1St. Marks (#2)USFL12129000130.09-84.16809/01/2106/28/22
SAPE1San Pedro ParksUSNM35039900036.01-106.84293509/01/2106/28/22
SAWE1Saguaro WestUSAZ04019900032.25-111.2271409/01/2106/28/22
SAWT1Sawtooth NFUSID16037000244.17-114.93199009/01/2106/28/22
SENE1SeneyUSMI26153900046.29-85.9521509/01/2106/28/22
SEQU1Sequoia NPUSCA06107100136.49-118.8351909/01/2106/28/22
SHEN1Shenandoah NPUSVA51113900038.52-78.43107909/01/2106/28/22
SHMI1Shamrock MineUSCO08067900037.3-107.48235109/01/2112/27/21
SHRO1Shining Rock WildernessUSNC37087003535.39-82.77161709/04/2106/28/22
SIME1SimeonofUSAK02013000255.33-160.515709/01/2106/28/22
SIPS1Sipsey WildernessUSAL01079900034.34-87.3428609/01/2106/28/22
SNPA1Snoqualmie PassUSWA53037000447.42-121.43104909/01/2106/28/22
SOGP1Southern Great PlainsUSOK40053900036.61-97.4931409/01/2106/28/22
STAR1StarkeyUSOR41061001045.22-118.51125909/01/2106/28/22
STIL1StilwellUSOK40071901035.75-94.6730009/01/2106/28/22
SULA1Sula PeakUSMT30081900045.86-114189609/01/2106/28/22
SWAN1SwanquarterUSNC37095900035.45-76.21-409/01/2106/28/22
SWAN1Swanquarter (#2)USNC37095900035.45-76.21-409/01/2106/28/22
SYCA2Sycamore CanyonUSAZ 35.16-111.98204609/10/2106/25/22
TALL1TallgrassUSKS20017000138.43-96.5639009/01/2106/28/22
THRO1Theodore RooseveltUSND38007000246.89-103.3885309/01/2106/28/22
THSI1Three Sisters WildernessUSOR41039007044.29-122.0488509/01/2106/28/22
TONT1Tonto NMUSAZ04007001033.65-111.1177509/01/2106/28/22
TOOL1Toolik Lake Field StationUSAK02185900068.63-149.6174009/01/2106/28/22
TRCR1Trapper CreekUSAK02170001162.32-150.3215509/01/2106/28/22
TRIN1TrinityUSCA06105900040.79-122.8101409/01/2106/28/22
ULBE1UL BendUSMT30027900047.58-108.7289109/01/2106/28/22
UPBU1Upper Buffalo WildernessUSAR05101900035.83-93.272309/04/2106/28/22
VIIS1Virgin Islands NPUSVI78020900018.34-64.85109/01/2106/28/22
VILA1Viking LakeUSIA19137000240.97-95.0537109/01/2106/28/22
VOYA2Voyageurs NP #2USMN27137900048.41-92.8342909/01/2106/28/22
WEMI1Weminuche WildernessUSCO08111900037.66-107.8275009/01/2106/28/22
WHIT1White MountainUSNM35027900033.47-105.53206409/01/2106/28/22
WHPA1White PassUSWA53041000746.62-121.39182709/04/2106/28/22
WHPE1Wheeler PeakUSNM35055900036.59-105.45336609/01/2106/28/22
WHRI1White River NFUSCO08097900039.15-106.82341409/01/2106/28/22
WICA1Wind CaveUSSD46033013243.56-103.48129609/01/2106/28/22
WICA1Wind Cave (#2)USSD46033013243.56-103.48129609/01/2106/28/22
WIMO1Wichita MountainsUSOK40031900034.73-98.7150909/01/2106/28/22
YELL2Yellowstone NPUSWY56039900044.57-110.4242509/01/2106/28/22
YOSE1Yosemite NPUSCA06043000337.71-119.71160309/04/2106/28/22
YOSE1Yosemite NP (#2)USCA06043000337.71-119.71160309/04/2106/28/22
ZICA1Zion CanyonUSUT49053013037.2-113.15121509/01/2106/28/22
CodeNameUnitsfromSourceCodeSourceUnits
ALfAluminum (Fine)µg/m^3<--ALng/m^3
ASfArsenic (Fine)µg/m^3<--ASng/m^3
BRfBromine (Fine)µg/m^3<--BRng/m^3
CAfCalcium (Fine)µg/m^3<--CAng/m^3
CLfChlorine (Fine)µg/m^3<--CLng/m^3
CHLfChloride (Fine)µg/m^3<--CLDng/m^3
CRfChromium (Fine)µg/m^3<--CRng/m^3
CUfCopper (Fine)µg/m^3<--CUng/m^3
EC_UCDCarbon, Elemental Total (Fine), by UCDµg/m^3<--EC_UCDng/m^3
EC1fCarbon, Elemental Fraction 1 (Fine)µg/m^3<--EC1ng/m^3
EC2fCarbon, Elemental Fraction 2 (Fine)µg/m^3<--EC2ng/m^3
EC3fCarbon, Elemental Fraction 3 (Fine)µg/m^3<--EC3ng/m^3
SampDurSampling Durationminutes<--ETminutes
fAbsFilter Absorption Coefficient1/Mm<--fabs1/Mm
FEfIron (Fine)µg/m^3<--FEng/m^3
FlowRateFlow RateR<--FlowR
KfPotassium (Fine)µg/m^3<--Kng/m^3
MFMass, PM2.5 (Fine)µg/m^3<--MFng/m^3
MGfMagnesium (Fine)µg/m^3<--MGng/m^3
MNfManganese (Fine)µg/m^3<--MNng/m^3
NAfSodium (Fine)µg/m^3<--NAng/m^3
NIfNickel (Fine)µg/m^3<--NIng/m^3
N2fNitrite (Fine)µg/m^3<--NO2ng/m^3
NO3fNitrate (Fine)µg/m^3<--NO3ng/m^3
OC_UCDCarbon, Organic Total (Fine), by UCDµg/m^3<--OC_UCDng/m^3
OC1fCarbon, Organic Fraction 1 (Fine)µg/m^3<--OC1ng/m^3
OC2fCarbon, Organic Fraction 2 (Fine)µg/m^3<--OC2ng/m^3
OC3fCarbon, Organic Fraction 3 (Fine)µg/m^3<--OC3ng/m^3
OC4fCarbon, Organic Fraction 4 (Fine)µg/m^3<--OC4ng/m^3
OP405TROrganic Pyrolyzed Carbon by Reflectance at 405 nmµg/m^3<--OP405TRng/m^3
OP405TTOrganic Pyrolyzed Carbon by Transmittance at 405 nmµg/m^3<--OP405TTng/m^3
OP445TROrganic Pyrolyzed Carbon by Reflectance at 445 nmµg/m^3<--OP445TRng/m^3
OP445TTOrganic Pyrolyzed Carbon by Transmittance at 445 nmµg/m^3<--OP445TTng/m^3
OP532TROrganic Pyrolyzed Carbon by Reflectance at 532 nmµg/m^3<--OP532TRng/m^3
OP532TTOrganic Pyrolyzed Carbon by Transmittance at 532 nmµg/m^3<--OP532TTng/m^3
OP780TROrganic Pyrolyzed Carbon by Reflectance at 780 nmµg/m^3<--OP780TRng/m^3
OP780TTOrganic Pyrolyzed Carbon by Transmittance at 780 nmµg/m^3<--OP780TTng/m^3
OP808TROrganic Pyrolyzed Carbon by Reflectance at 808 nmµg/m^3<--OP808TRng/m^3
OP808TTOrganic Pyrolyzed Carbon by Transmittance at 808 nmµg/m^3<--OP808TTng/m^3
OP980TROrganic Pyrolyzed Carbon by Reflectance at 980 nmµg/m^3<--OP980TRng/m^3
OP980TTOrganic Pyrolyzed Carbon by Transmittance at 980 nmµg/m^3<--OP980TTng/m^3
OPfCarbon, Organic Pyrolized (Fine), by Reflectanceµg/m^3<--OPTRng/m^3
OPTfCarbon, Organic Pyrolized (Fine), by Transmittanceµg/m^3<--OPTTng/m^3
PfPhosphorus (Fine)µg/m^3<--Png/m^3
PBfLead (Fine)µg/m^3<--PBng/m^3
MTMass, PM10 (Total)µg/m^3<--PM10ng/m^3
MFMass, PM2.5 (Fine)µg/m^3<--PM2.5ng/m^3
RBfRubidium (Fine)µg/m^3<--RBng/m^3
RefF_405Final laser reflectance at 405 nm(ratio)<--RefF_405(ratio)
RefF_445Final laser reflectance at 445 nm(ratio)<--RefF_445(ratio)
RefF_532Final laser reflectance at 532 nm(ratio)<--RefF_532(ratio)
RefF_635Final laser reflectance at 635 nm(ratio)<--RefF_635(ratio)
RefF_780Final laser reflectance at 780 nm(ratio)<--RefF_780(ratio)
RefF_808Final laser reflectance at 808 nm(ratio)<--RefF_808(ratio)
RefF_980Final laser reflectance at 980 nm(ratio)<--RefF_980(ratio)
RefI_405Initial laser reflectance at 405 nm(ratio)<--RefI_405(ratio)
RefI_445Initial laser reflectance at 445 nm(ratio)<--RefI_445(ratio)
RefI_532Initial laser reflectance at 532 nm(ratio)<--RefI_532(ratio)
RefI_635Initial laser reflectance at 635 nm(ratio)<--RefI_635(ratio)
RefI_780Initial laser reflectance at 780 nm(ratio)<--RefI_780(ratio)
RefI_808Initial laser reflectance at 808 nm(ratio)<--RefI_808(ratio)
RefI_980Initial laser reflectance at 980 nm(ratio)<--RefI_980(ratio)
RefM_405Minimum laser reflectance at 405 nm(ratio)<--RefM_405(ratio)
RefM_445Minimum laser reflectance at 445 nm(ratio)<--RefM_445(ratio)
RefM_532Minimum laser reflectance at 532 nm(ratio)<--RefM_532(ratio)
RefM_635Minimum laser reflectance at 635 nm(ratio)<--RefM_635(ratio)
RefM_780Minimum laser reflectance at 780 nm(ratio)<--RefM_780(ratio)
RefM_808Minimum laser reflectance at 808 nm(ratio)<--RefM_808(ratio)
RefM_980Minimum laser reflectance at 980 nm(ratio)<--RefM_980(ratio)
SfSulfur (Fine)µg/m^3<--Sng/m^3
SEfSelenium (Fine)µg/m^3<--SEng/m^3
SIfSilicon (Fine)µg/m^3<--SIng/m^3
SO4fSulfate (Fine)µg/m^3<--SO4ng/m^3
SRfStrontium (Fine)µg/m^3<--SRng/m^3
TCfCarbon, Total (Fine)µg/m^3<--TCng/m^3
TIfTitanium (Fine)µg/m^3<--TIng/m^3
TransF_405Final laser transmittance at 405 nm(ratio)<--TransF_405(ratio)
TransF_445Final laser transmittance at 445 nm(ratio)<--TransF_445(ratio)
TransF_532Final laser transmittance at 532 nm(ratio)<--TransF_532(ratio)
TransF_635Final laser transmittance at 635 nm(ratio)<--TransF_635(ratio)
TransF_780Final laser transmittance at 780 nm(ratio)<--TransF_780(ratio)
TransF_808Final laser transmittance at 808 nm(ratio)<--TransF_808(ratio)
TransF_980Final laser transmittance at 980 nm(ratio)<--TransF_980(ratio)
TransI_405Initial laser transmittance at 405 nm(ratio)<--TransI_405(ratio)
TransI_445Initial laser transmittance at 445 nm(ratio)<--TransI_445(ratio)
TransI_532Initial laser transmittance at 532 nm(ratio)<--TransI_532(ratio)
TransI_635Initial laser transmittance at 635 nm(ratio)<--TransI_635(ratio)
TransI_780Initial laser transmittance at 780 nm(ratio)<--TransI_780(ratio)
TransI_808Initial laser transmittance at 808 nm(ratio)<--TransI_808(ratio)
TransI_980Initial laser transmittance at 980 nm(ratio)<--TransI_980(ratio)
TransM_405Minimum laser transmittance at 405 nm(ratio)<--TransM_405(ratio)
TransM_445Minimum laser transmittance at 445 nm(ratio)<--TransM_445(ratio)
TransM_532Minimum laser transmittance at 532 nm(ratio)<--TransM_532(ratio)
TransM_635Minimum laser transmittance at 635 nm(ratio)<--TransM_635(ratio)
TransM_780Minimum laser transmittance at 780 nm(ratio)<--TransM_780(ratio)
TransM_808Minimum laser transmittance at 808 nm(ratio)<--TransM_808(ratio)
TransM_980Minimum laser transmittance at 980 nm(ratio)<--TransM_980(ratio)
VfVanadium (Fine)µg/m^3<--Vng/m^3
ZNfZinc (Fine)µg/m^3<--ZNng/m^3
ZRfZirconium (Fine)µg/m^3<--ZRng/m^3
FlagCodeDescriptionCategorySourceColumn
0Data points with NULL values in Debbie Miller's RHR data that have a '0' value in the flag_a, flag_b, flag_c, or flag_d field.Quality AssuranceFLAG_%
AAORGANIC ARTIFACT CORRECTEDQuality AssuranceFLAG_%
APPossible Organic ArtifactQuality AssuranceFLAG_%
BIIncorrect installation of sample cartridge during weekly changeQuality AssuranceFLAG_%
CGFlowrate less than 18 liters per minute for more than 6 hoursQuality AssuranceFLAG_%
CLFlowrate less than 15 liters per minute for more than 6 hoursQuality AssuranceFLAG_%
DADid not analyzeQuality AssuranceFLAG_%
DEDerived valueQuality AssuranceFLAG_%
DFUnknownUnknownFLAG_%
EEUnknown flagTemporaryFLAG_%
EPEquipment ProblemQuality AssuranceFLAG_%
LCUnknownUnknownFLAG_%
LDBelow detection limit - at one point this flag was mapped to 'NM'Quality AssuranceFLAG_%
LFThe flow is greater than 10% higher or lower than the nominal flow rate. This effects the cut point of the particle but the concentrations are correct.Quality AssuranceFLAG_%
MMUnknownUnknownFLAG_%
NANot Applicable. This is used for missing modules with non-protocol samplers with less than four modules.Quality AssuranceFLAG_%
NMNORMALQuality AssuranceFLAG_%
NRSamples that have OP=0 that may actually have a negative OP.Quality AssuranceFLAG_%
NSOperator did not install the samples or installed them too late to acquire a valid time. All filters involved.Quality AssuranceFLAG_%
OLOff Line. In some cases, this is used when the sampler is inoperable due to hurricane or fire. For year 2000, this is used for the period after the Version 1 sampler is removed and before the Version 2 samples begins operation.Quality AssuranceFLAG_%
PCPossible contaminationQuality AssuranceStatus
POPower Outage. All filters involved.Quality AssuranceFLAG_%
QAQA problem suspected, value held back for further investigationQuality AssuranceFLAG_%
QCValid value despite failing to meet some QC or statistical criteria.Quality AssuranceFLAG_%
QDQuestionable dataQuality AssuranceFLAG_%
QVData quality check (internal use only)Quality AssuranceFLAG_%
RFThe flow is greater than 20% higher or lower than the nominal flow rate. This affects the cut point of the particle but the concentrations are correct.Quality AssuranceFLAG_%
SAUsed to indicate some sort of 'Sampling Anomaly', though the exact definition has yet to be satisfactorily defined.Quality AssuranceFLAG_%
SEUnknownUnknownFLAG_%
SOSent OutTemporaryFLAG_%
SPAn artifact filter was swapped with a sample filter.Quality AssuranceFLAG_%
SWSuspected filter swap.Quality AssuranceFLAG_%
TOTiming Outside normal boundsQuality AssuranceFlag_%
TUNon-standard sampling conditionsQuality AssuranceFLAG_%
UNThe concentrations failed the data validation for unknown reasons. Quality AssuranceFLAG_%
XXThe filter is damaged. Quality AssuranceFLAG_%