VARNUM	NAME	LABEL	TYPE	LENGTH
1	SITE_ID	ID Assigned to Each Site	2	25
2	VISIT_NO	Sequential Visit Number Within Year	1	
3	SITE_TYPE	PROB_Samp: Lake is from probability sample and can be used for population estimation.  REF_Lake: Lake is not from probability sample and was selected as a candidate reference lake	2	10
4	LAKE_SAMP	"Eval. status. _Denied (access denied). _Inaccess (physically inaccessible). _Other. _LT_4ha (< 4ha). _Shallow (< 1m deep). _Vegetated (< 1000 m2 open H2O). _Saline (tidal). Special_Purpose (aquacult., disposal, WWT, or evap.). Not_Lake (other)"	2	20
5	TNT	Target:Non-target evaluation status derived from LAKE_SAMP	2	10
6	LAT_DD	Latitude (decimal degrees) obtained from NHD (NAD83)	1	
7	LON_DD	Longitude (decimal degrees) obtained from NHD (NAD83)	1	
8	ST	State two letter code	2	2
9	EPA_REG	EPA Region	2	9
10	AREA_CAT7	Lake area unequal probability category (7 categories)	2	10
11	NESLAKE	NESLake-Lake was included in 1970s National Eutrophication Survey	2	7
12	STRATUM	Probability survey design stratum. NLALake is single stratum	2	8
13	PANEL	Panel_1-lake was included in base design. OverSamp-Lake was part of over sample of lakes used for replacing lakes in base design if they could not be sampled	2	8
14	DSGN_CAT	Probability survey design categories used to assign unequal probability of selection	2	15
15	MDCATY	Unequal selection probability for lake	1	
16	WGT	Initial site weight based on base design. DO NOT USE for population estimation	1	
17	WGT_NLA	Adjusted site weight. USE for population estimation	1	
18	ADJWGT_CAT	Categories used to adjust initial design weight (WGT) to account for use of over sample lakes.	2	5
19	URBAN	URBAN LAKE? (YES/NO)	2	3
20	WSA_ECO3	Wadeable Stream Assessment three aggregrated Omernik level 3 ecoregions	2	6
21	WSA_ECO9	Wadeable Stream Assessment nine aggregrated Omernik level 3 ecoregions	2	3
22	ECO_LEV_3	Omernik level 3 ecoregion number	2	2
23	NUT_REG	"Nutrient ecoregion, based on EPA nutrient criteria documents for lakes & reservoirs)"	2	4
24	NUTREG_NAME	Nutrient ecoregion name	2	60
25	ECO_NUTA	NLA Aggregate Nutrient Ecoregion	2	5
26	LAKE_ORIGIN	"Lake origin (MAN-MADE, NATURAL [which includes natural lakes augmented by dams])"	2	9
27	ECO3_X_ORIGIN	WSA_ECO3 x LAKE_ORIGIN CLASS	2	20
28	REF_CLUSTER	NLA Reference Site Cluster (A-G)	2	1
29	RT_NLA	"NLA Reference Class Assignment (REF=reference, SO-SO=intermediate, TRASH=impacted)"	2	8
30	REF_NUTR	Nutrient Least Disturbed Reference Site (Y/N)	2	1
31	HUC_2	Hydrologic region (2-digit)	2	2
32	HUC_8	Hydrologic region (8-digit)	2	8
33	FLAG_INFO	Data qualifier flag for lake info data	2	12
34	COMMENT_INFO	Comments and flag explanations for lake info data	2	160
35	SAMPLED	Site Sampled Code	2	30
36	SAMPLED_OE5	Site Sampled Code for plankton O/E indicator (= both plankton samples and all predictor variables collected)	2	24
37	INDXSAMP_OE5	Index Planktonic O/E visit for site (YES/NO)-typically visit 1	2	3
38	OE5	Plankton O/E value	1	
39	OE5_COND	"CONDITION CLASS (PLANKTON O/E INDICATOR)BASED ON FIXED TAXA LOSS THRESHOLDS (0.8, 0.6)"	2	30
40	OE5_COND_985	"CONDITION CLASS (PLANKTON O/E INDICATOR)BASED ON FIXED TAXA LOSS THRESHOLDS (0.9, 0.8, and 0.5)"	2	30
41	OE5_COND_R	CONDITION CLASS (PLANKTON O/E INDICATOR) BASED ON THRESHOLDS DERIVED FROM REFERENCE SITES	2	30
42	SHORT_ID	Unique 5-character site-visit ID number (for use with PC-ORD)	2	5
43	FLAG_OE5	Data qualifier Flag for plankton O/E index	2	12
44	COMMENT_OE5	Comments and flag explanations for plankton O/E index	2	160