April 03, 2025

AQS Reference Table

JavaScript must be enabled to view this page.

To sort on a column, click the column header. That column will be (subtly) highlighted. Particularly useful is the search box at the top of the table on the right. Separate mulitiple search terms with a space. Search looks across all columns in the table.

Downoad a csv version: disallowed_qualifiers.csv

Parameter Code	Paramater	Qualifier Code	Qaulifier Description
86502	Acceptable PM10-2.5 - Local Conditions	CC	Clean Canister Residue.
86502	Acceptable PM10-2.5 - Local Conditions	9	Negative value detected - zero reported.
86502	Acceptable PM10-2.5 - Local Conditions	CL	Surrogate Recoveries Outside Control Limits.
86502	Acceptable PM10-2.5 - Local Conditions	CB	Values have been Blank Corrected.
88502	Acceptable PM2.5 AQI & Speciation Mass	LK	Analyte Identified; Reported Value May Be Biased High.
88502	Acceptable PM2.5 AQI & Speciation Mass	CC	Clean Canister Residue.
88502	Acceptable PM2.5 AQI & Speciation Mass	LJ	Identification Of Analyte Is Acceptable; Reported Value Is An Estimate.
88502	Acceptable PM2.5 AQI & Speciation Mass	9	Negative value detected - zero reported.
88502	Acceptable PM2.5 AQI & Speciation Mass	CL	Surrogate Recoveries Outside Control Limits.
68104	Ambient Max Temperature	LK	Analyte Identified; Reported Value May Be Biased High.
68104	Ambient Max Temperature	LL	Analyte Identified; Reported Value May Be Biased Low.
68104	Ambient Max Temperature	CC	Clean Canister Residue.
68104	Ambient Max Temperature	Y	Elapsed Sample Time out of Spec.
68104	Ambient Max Temperature	FB	Field Blank Value Above Acceptable Limit.
68104	Ambient Max Temperature	W	Flow Rate Average out of Spec.
68104	Ambient Max Temperature	LJ	Identification Of Analyte Is Acceptable; Reported Value Is An Estimate.
68104	Ambient Max Temperature	LB	Lab blank value above acceptable limit.
68104	Ambient Max Temperature	MX	Matrix Effect.
68104	Ambient Max Temperature	9	Negative value detected - zero reported.
68104	Ambient Max Temperature	HT	Sample pick-up hold time exceeded.
68104	Ambient Max Temperature	CL	Surrogate Recoveries Outside Control Limits.
68104	Ambient Max Temperature	TB	Trip Blank Value Above Acceptable Limit.
68104	Ambient Max Temperature	CB	Values have been Blank Corrected.
68103	Ambient Min Temperature	LK	Analyte Identified; Reported Value May Be Biased High.
68103	Ambient Min Temperature	LL	Analyte Identified; Reported Value May Be Biased Low.
68103	Ambient Min Temperature	CC	Clean Canister Residue.
68103	Ambient Min Temperature	Y	Elapsed Sample Time out of Spec.
68103	Ambient Min Temperature	FB	Field Blank Value Above Acceptable Limit.
68103	Ambient Min Temperature	W	Flow Rate Average out of Spec.
68103	Ambient Min Temperature	LJ	Identification Of Analyte Is Acceptable; Reported Value Is An Estimate.
68103	Ambient Min Temperature	LB	Lab blank value above acceptable limit.
68103	Ambient Min Temperature	MX	Matrix Effect.
68103	Ambient Min Temperature	9	Negative value detected - zero reported.
68103	Ambient Min Temperature	HT	Sample pick-up hold time exceeded.
68103	Ambient Min Temperature	CL	Surrogate Recoveries Outside Control Limits.
68103	Ambient Min Temperature	TB	Trip Blank Value Above Acceptable Limit.
68103	Ambient Min Temperature	CB	Values have been Blank Corrected.
68105	Average Ambient Temperature	LK	Analyte Identified; Reported Value May Be Biased High.
68105	Average Ambient Temperature	LL	Analyte Identified; Reported Value May Be Biased Low.
68105	Average Ambient Temperature	CC	Clean Canister Residue.
68105	Average Ambient Temperature	Y	Elapsed Sample Time out of Spec.
68105	Average Ambient Temperature	FB	Field Blank Value Above Acceptable Limit.
68105	Average Ambient Temperature	W	Flow Rate Average out of Spec.
68105	Average Ambient Temperature	LJ	Identification Of Analyte Is Acceptable; Reported Value Is An Estimate.
68105	Average Ambient Temperature	LB	Lab blank value above acceptable limit.
68105	Average Ambient Temperature	MX	Matrix Effect.
68105	Average Ambient Temperature	9	Negative value detected - zero reported.
68105	Average Ambient Temperature	HT	Sample pick-up hold time exceeded.
68105	Average Ambient Temperature	CL	Surrogate Recoveries Outside Control Limits.
68105	Average Ambient Temperature	TB	Trip Blank Value Above Acceptable Limit.
68105	Average Ambient Temperature	CB	Values have been Blank Corrected.
42101	Carbon monoxide	LK	Analyte Identified; Reported Value May Be Biased High.
42101	Carbon monoxide	LL	Analyte Identified; Reported Value May Be Biased Low.
42101	Carbon monoxide	CC	Clean Canister Residue.
42101	Carbon monoxide	FB	Field Blank Value Above Acceptable Limit.
42101	Carbon monoxide	X	Filter Temperature Difference or Average out of Spec.
42101	Carbon monoxide	W	Flow Rate Average out of Spec.
42101	Carbon monoxide	LJ	Identification Of Analyte Is Acceptable; Reported Value Is An Estimate.
42101	Carbon monoxide	4	Lab Issue.
42101	Carbon monoxide	LB	Lab blank value above acceptable limit.
42101	Carbon monoxide	9	Negative value detected - zero reported.
42101	Carbon monoxide	ND	No Value Detected, Zero Reported.
42101	Carbon monoxide	HT	Sample pick-up hold time exceeded.
42101	Carbon monoxide	CL	Surrogate Recoveries Outside Control Limits.
42101	Carbon monoxide	TB	Trip Blank Value Above Acceptable Limit.
42101	Carbon monoxide	CB	Values have been Blank Corrected.
22128	Lead (SP)	CC	Clean Canister Residue.
22128	Lead (SP)	X	Filter Temperature Difference or Average out of Spec.
22128	Lead (SP)	9	Negative value detected - zero reported.
14129	Lead (TSP) LC	LK	Analyte Identified; Reported Value May Be Biased High.
14129	Lead (TSP) LC	LL	Analyte Identified; Reported Value May Be Biased Low.
14129	Lead (TSP) LC	CC	Clean Canister Residue.
14129	Lead (TSP) LC	X	Filter Temperature Difference or Average out of Spec.
14129	Lead (TSP) LC	LJ	Identification Of Analyte Is Acceptable; Reported Value Is An Estimate.
14129	Lead (TSP) LC	9	Negative value detected - zero reported.
14129	Lead (TSP) LC	ND	No Value Detected, Zero Reported.
14129	Lead (TSP) LC	SS	Value substituted from secondary monitor.
14129	Lead (TSP) LC	CB	Values have been Blank Corrected.
14128	Lead (TSP) LC Non-FRM/FEM	CC	Clean Canister Residue.
14128	Lead (TSP) LC Non-FRM/FEM	X	Filter Temperature Difference or Average out of Spec.
14128	Lead (TSP) LC Non-FRM/FEM	9	Negative value detected - zero reported.
12128	Lead (TSP) STP	LK	Analyte Identified; Reported Value May Be Biased High.
12128	Lead (TSP) STP	LL	Analyte Identified; Reported Value May Be Biased Low.
12128	Lead (TSP) STP	CC	Clean Canister Residue.
12128	Lead (TSP) STP	X	Filter Temperature Difference or Average out of Spec.
12128	Lead (TSP) STP	LJ	Identification Of Analyte Is Acceptable; Reported Value Is An Estimate.
12128	Lead (TSP) STP	9	Negative value detected - zero reported.
12128	Lead (TSP) STP	CB	Values have been Blank Corrected.
85128	Lead PM10 LC	CC	Clean Canister Residue.
85128	Lead PM10 LC	9	Negative value detected - zero reported.
85128	Lead PM10 LC	CB	Values have been Blank Corrected.
85129	Lead PM10 LC FRM/FEM	LK	Analyte Identified; Reported Value May Be Biased High.
85129	Lead PM10 LC FRM/FEM	LL	Analyte Identified; Reported Value May Be Biased Low.
85129	Lead PM10 LC FRM/FEM	CC	Clean Canister Residue.
85129	Lead PM10 LC FRM/FEM	X	Filter Temperature Difference or Average out of Spec.
85129	Lead PM10 LC FRM/FEM	LJ	Identification Of Analyte Is Acceptable; Reported Value Is An Estimate.
85129	Lead PM10 LC FRM/FEM	9	Negative value detected - zero reported.
85129	Lead PM10 LC FRM/FEM	ND	No Value Detected, Zero Reported.
85129	Lead PM10 LC FRM/FEM	SS	Value substituted from secondary monitor.
85129	Lead PM10 LC FRM/FEM	CB	Values have been Blank Corrected.
83128	Lead PM10-2.5 STP	CC	Clean Canister Residue.
83128	Lead PM10-2.5 STP	X	Filter Temperature Difference or Average out of Spec.
83128	Lead PM10-2.5 STP	9	Negative value detected - zero reported.
88128	Lead PM2.5 LC	CC	Clean Canister Residue.
88128	Lead PM2.5 LC	CB	Values have been Blank Corrected.
84128	Lead PM2.5 STP	CC	Clean Canister Residue.
84128	Lead PM2.5 STP	9	Negative value detected - zero reported.
84128	Lead PM2.5 STP	CB	Values have been Blank Corrected.
12129	Lead-210 (TSP) STP	CC	Clean Canister Residue.
12129	Lead-210 (TSP) STP	X	Filter Temperature Difference or Average out of Spec.
12129	Lead-210 (TSP) STP	9	Negative value detected - zero reported.
12129	Lead-210 (TSP) STP	CB	Values have been Blank Corrected.
42612	NOy - NO	XS	Traceable to a Standard Reference Photometer (SRP) with the Hearn (1961) 308.32 atm-1 cm-1 Ozone Cross-Section Value.
42601	Nitric oxide (NO)	XS	Traceable to a Standard Reference Photometer (SRP) with the Hearn (1961) 308.32 atm-1 cm-1 Ozone Cross-Section Value.
42602	Nitrogen dioxide (NO2)	LK	Analyte Identified; Reported Value May Be Biased High.
42602	Nitrogen dioxide (NO2)	LL	Analyte Identified; Reported Value May Be Biased Low.
42602	Nitrogen dioxide (NO2)	CC	Clean Canister Residue.
42602	Nitrogen dioxide (NO2)	FB	Field Blank Value Above Acceptable Limit.
42602	Nitrogen dioxide (NO2)	X	Filter Temperature Difference or Average out of Spec.
42602	Nitrogen dioxide (NO2)	W	Flow Rate Average out of Spec.
42602	Nitrogen dioxide (NO2)	LJ	Identification Of Analyte Is Acceptable; Reported Value Is An Estimate.
42602	Nitrogen dioxide (NO2)	4	Lab Issue.
42602	Nitrogen dioxide (NO2)	LB	Lab blank value above acceptable limit.
42602	Nitrogen dioxide (NO2)	9	Negative value detected - zero reported.
42602	Nitrogen dioxide (NO2)	ND	No Value Detected, Zero Reported.
42602	Nitrogen dioxide (NO2)	HT	Sample pick-up hold time exceeded.
42602	Nitrogen dioxide (NO2)	CL	Surrogate Recoveries Outside Control Limits.
42602	Nitrogen dioxide (NO2)	XS	Traceable to a Standard Reference Photometer (SRP) with the Hearn (1961) 308.32 atm-1 cm-1 Ozone Cross-Section Value.
42602	Nitrogen dioxide (NO2)	TB	Trip Blank Value Above Acceptable Limit.
42602	Nitrogen dioxide (NO2)	CB	Values have been Blank Corrected.
42603	Oxides of nitrogen (NOx)	XS	Traceable to a Standard Reference Photometer (SRP) with the Hearn (1961) 308.32 atm-1 cm-1 Ozone Cross-Section Value.
44201	Ozone	LK	Analyte Identified; Reported Value May Be Biased High.
44201	Ozone	LL	Analyte Identified; Reported Value May Be Biased Low.
44201	Ozone	CC	Clean Canister Residue.
44201	Ozone	FB	Field Blank Value Above Acceptable Limit.
44201	Ozone	X	Filter Temperature Difference or Average out of Spec.
44201	Ozone	W	Flow Rate Average out of Spec.
44201	Ozone	LJ	Identification Of Analyte Is Acceptable; Reported Value Is An Estimate.
44201	Ozone	4	Lab Issue.
44201	Ozone	LB	Lab blank value above acceptable limit.
44201	Ozone	9	Negative value detected - zero reported.
44201	Ozone	ND	No Value Detected, Zero Reported.
44201	Ozone	HT	Sample pick-up hold time exceeded.
44201	Ozone	CL	Surrogate Recoveries Outside Control Limits.
44201	Ozone	TB	Trip Blank Value Above Acceptable Limit.
44201	Ozone	CB	Values have been Blank Corrected.
85101	PM10 - LC	CC	Clean Canister Residue.
85101	PM10 - LC	9	Negative value detected - zero reported.
85101	PM10 - LC	CL	Surrogate Recoveries Outside Control Limits.
85101	PM10 - LC	CB	Values have been Blank Corrected.
81102	PM10 Total 0-10um STP	LK	Analyte Identified; Reported Value May Be Biased High.
81102	PM10 Total 0-10um STP	LL	Analyte Identified; Reported Value May Be Biased Low.
81102	PM10 Total 0-10um STP	CC	Clean Canister Residue.
81102	PM10 Total 0-10um STP	LJ	Identification Of Analyte Is Acceptable; Reported Value Is An Estimate.
81102	PM10 Total 0-10um STP	9	Negative value detected - zero reported.
81102	PM10 Total 0-10um STP	ND	No Value Detected, Zero Reported.
81102	PM10 Total 0-10um STP	CL	Surrogate Recoveries Outside Control Limits.
81102	PM10 Total 0-10um STP	SS	Value substituted from secondary monitor.
81102	PM10 Total 0-10um STP	CB	Values have been Blank Corrected.
86101	PM10-2.5 - Local Conditions	CC	Clean Canister Residue.
86101	PM10-2.5 - Local Conditions	9	Negative value detected - zero reported.
86101	PM10-2.5 - Local Conditions	ND	No Value Detected, Zero Reported.
86101	PM10-2.5 - Local Conditions	CL	Surrogate Recoveries Outside Control Limits.
86101	PM10-2.5 - Local Conditions	SS	Value substituted from secondary monitor.
86101	PM10-2.5 - Local Conditions	CB	Values have been Blank Corrected.
81103	PM10-2.5 STP	LK	Analyte Identified; Reported Value May Be Biased High.
81103	PM10-2.5 STP	LL	Analyte Identified; Reported Value May Be Biased Low.
81103	PM10-2.5 STP	CC	Clean Canister Residue.
81103	PM10-2.5 STP	LJ	Identification Of Analyte Is Acceptable; Reported Value Is An Estimate.
81103	PM10-2.5 STP	9	Negative value detected - zero reported.
81103	PM10-2.5 STP	CL	Surrogate Recoveries Outside Control Limits.
88101	PM2.5 - Local Conditions	LK	Analyte Identified; Reported Value May Be Biased High.
88101	PM2.5 - Local Conditions	LL	Analyte Identified; Reported Value May Be Biased Low.
88101	PM2.5 - Local Conditions	CC	Clean Canister Residue.
88101	PM2.5 - Local Conditions	LJ	Identification Of Analyte Is Acceptable; Reported Value Is An Estimate.
88101	PM2.5 - Local Conditions	9	Negative value detected - zero reported.
88101	PM2.5 - Local Conditions	ND	No Value Detected, Zero Reported.
88101	PM2.5 - Local Conditions	CL	Surrogate Recoveries Outside Control Limits.
88101	PM2.5 - Local Conditions	SS	Value substituted from secondary monitor.
88101	PM2.5 - Local Conditions	CB	Values have been Blank Corrected.
88501	PM2.5 Raw Data	LK	Analyte Identified; Reported Value May Be Biased High.
88501	PM2.5 Raw Data	CC	Clean Canister Residue.
88501	PM2.5 Raw Data	LJ	Identification Of Analyte Is Acceptable; Reported Value Is An Estimate.
88501	PM2.5 Raw Data	9	Negative value detected - zero reported.
88501	PM2.5 Raw Data	CL	Surrogate Recoveries Outside Control Limits.
81104	PM2.5 STP	LK	Analyte Identified; Reported Value May Be Biased High.
81104	PM2.5 STP	LL	Analyte Identified; Reported Value May Be Biased Low.
81104	PM2.5 STP	CC	Clean Canister Residue.
81104	PM2.5 STP	LJ	Identification Of Analyte Is Acceptable; Reported Value Is An Estimate.
81104	PM2.5 STP	9	Negative value detected - zero reported.
81104	PM2.5 STP	CL	Surrogate Recoveries Outside Control Limits.
88500	PM2.5 Total Atmospheric	LK	Analyte Identified; Reported Value May Be Biased High.
88500	PM2.5 Total Atmospheric	CC	Clean Canister Residue.
88500	PM2.5 Total Atmospheric	LJ	Identification Of Analyte Is Acceptable; Reported Value Is An Estimate.
88500	PM2.5 Total Atmospheric	9	Negative value detected - zero reported.
88500	PM2.5 Total Atmospheric	CL	Surrogate Recoveries Outside Control Limits.
88503	PM2.5 Volatile Channel	LK	Analyte Identified; Reported Value May Be Biased High.
88503	PM2.5 Volatile Channel	CC	Clean Canister Residue.
88503	PM2.5 Volatile Channel	LJ	Identification Of Analyte Is Acceptable; Reported Value Is An Estimate.
88503	PM2.5 Volatile Channel	9	Negative value detected - zero reported.
88503	PM2.5 Volatile Channel	CL	Surrogate Recoveries Outside Control Limits.
42600	Reactive oxides of nitrogen (NOy)	XS	Traceable to a Standard Reference Photometer (SRP) with the Hearn (1961) 308.32 atm-1 cm-1 Ozone Cross-Section Value.
68102	Sample Volume	W	Flow Rate Average out of Spec.
42401	Sulfur dioxide	LK	Analyte Identified; Reported Value May Be Biased High.
42401	Sulfur dioxide	LL	Analyte Identified; Reported Value May Be Biased Low.
42401	Sulfur dioxide	CC	Clean Canister Residue.
42401	Sulfur dioxide	FB	Field Blank Value Above Acceptable Limit.
42401	Sulfur dioxide	X	Filter Temperature Difference or Average out of Spec.
42401	Sulfur dioxide	W	Flow Rate Average out of Spec.
42401	Sulfur dioxide	LJ	Identification Of Analyte Is Acceptable; Reported Value Is An Estimate.
42401	Sulfur dioxide	4	Lab Issue.
42401	Sulfur dioxide	LB	Lab blank value above acceptable limit.
42401	Sulfur dioxide	9	Negative value detected - zero reported.
42401	Sulfur dioxide	ND	No Value Detected, Zero Reported.
42401	Sulfur dioxide	HT	Sample pick-up hold time exceeded.
42401	Sulfur dioxide	CL	Surrogate Recoveries Outside Control Limits.
42401	Sulfur dioxide	TB	Trip Blank Value Above Acceptable Limit.
42401	Sulfur dioxide	CB	Values have been Blank Corrected.
61102	Wind Direction - Scalar	LK	Analyte Identified; Reported Value May Be Biased High.
61102	Wind Direction - Scalar	LL	Analyte Identified; Reported Value May Be Biased Low.
61102	Wind Direction - Scalar	7	Below Lowest Calibration Level.
61102	Wind Direction - Scalar	CC	Clean Canister Residue.
61102	Wind Direction - Scalar	Y	Elapsed Sample Time out of Spec.
61102	Wind Direction - Scalar	FB	Field Blank Value Above Acceptable Limit.
61102	Wind Direction - Scalar	X	Filter Temperature Difference or Average out of Spec.
61102	Wind Direction - Scalar	W	Flow Rate Average out of Spec.
61102	Wind Direction - Scalar	LJ	Identification Of Analyte Is Acceptable; Reported Value Is An Estimate.
61102	Wind Direction - Scalar	4	Lab Issue.
61102	Wind Direction - Scalar	LB	Lab blank value above acceptable limit.
61102	Wind Direction - Scalar	MX	Matrix Effect.
61102	Wind Direction - Scalar	9	Negative value detected - zero reported.
61102	Wind Direction - Scalar	HT	Sample pick-up hold time exceeded.
61102	Wind Direction - Scalar	CL	Surrogate Recoveries Outside Control Limits.
61102	Wind Direction - Scalar	TB	Trip Blank Value Above Acceptable Limit.
61102	Wind Direction - Scalar	MD	Value less than MDL.
61102	Wind Direction - Scalar	CB	Values have been Blank Corrected.
61101	Wind Speed - Scalar	LK	Analyte Identified; Reported Value May Be Biased High.
61101	Wind Speed - Scalar	LL	Analyte Identified; Reported Value May Be Biased Low.
61101	Wind Speed - Scalar	CC	Clean Canister Residue.
61101	Wind Speed - Scalar	Y	Elapsed Sample Time out of Spec.
61101	Wind Speed - Scalar	FB	Field Blank Value Above Acceptable Limit.
61101	Wind Speed - Scalar	X	Filter Temperature Difference or Average out of Spec.
61101	Wind Speed - Scalar	W	Flow Rate Average out of Spec.
61101	Wind Speed - Scalar	LJ	Identification Of Analyte Is Acceptable; Reported Value Is An Estimate.
61101	Wind Speed - Scalar	4	Lab Issue.
61101	Wind Speed - Scalar	LB	Lab blank value above acceptable limit.
61101	Wind Speed - Scalar	MX	Matrix Effect.
61101	Wind Speed - Scalar	9	Negative value detected - zero reported.
61101	Wind Speed - Scalar	HT	Sample pick-up hold time exceeded.
61101	Wind Speed - Scalar	CL	Surrogate Recoveries Outside Control Limits.
61101	Wind Speed - Scalar	TB	Trip Blank Value Above Acceptable Limit.
61101	Wind Speed - Scalar	CB	Values have been Blank Corrected.