Use the NSI proficiency testing (PT) studies to help improve quality and comply with regulations. There are no limits on the number of analysts or number of methods that you may report. Receive your final reports within 21 days of the study close date.

These environmental chemistry wastewater proficiency tests are designed for identification of target chemicals in wastewater.

If you have an immediate need for proficiency test results, PT Express™, our on-demand proficiency testing is available year-round. Call us at 1-800-234-7387 to place your order.

This sample will contain a subset of analytes from the following list:
1-Chlorohexane: 10 to 200 µg/L
1,1-Dichloropropene: 10 to 200 µg/L
1,1,1,2-Tetrachloroethane: 10 to 200 µg/L
1,1,2-Trichloro-1,2,2-trifluoroethane: 10 to 200 µg/L
1,2-Dibromo-3-chloropropane: 10 to 200 µg/L
1,2-Dibromoethane: 10 to 200 µg/L
1,2,3-Trichlorobenzene: 10 to 200 µg/L
1,2,3-Trichloropropane: 10 to 200 µg/L
1,2,4-Trimethylbenzene: 10 to 200 µg/L
1,3-Dichloropropane: 10 to 200 µg/L
1,3,5-Trichlorobenzene: 10 to 200 µg/L
1,3,5-Trimethylbenzene: 10 to 200 µg/L
1,4-Dioxane: 10 to 1000 µg/L
2-Chlorotoluene: 10 to 200 µg/L
2,2-Dichloropropane: 10 to 200 µg/L
3,3-Dimethyl-1-butanol: 5 to 500 µg/L
4-Chlorotoluene: 10 to 200 µg/L
Allyl chloride: 10 to 200 µg/L
Bromobenzene: 10 to 200 µg/L
Bromochloromethane: 10 to 200 µg/L
Chloroprene: 10 to 200 µg/L
Cyclohexanone: 10 to 200 µg/L
cis-1,4-Dichloro-2-butene: 10 to 200 µg/L
Diethyl ether: 5 to 500 µg/L
Diisopropyl ether: 5 to 200 µg/L
Ethanol: 500 to 5000 µg/L
Ethyl methacrylate: 10 to 200 µg/L
Ethyl-tert-butyl ether: 5 to 200 µg/L
Hexachlorobutadiene: 10 to 200 µg/L
Iodomethane: 10 to 200 µg/L
Isobutyl alcohol: 10 to 1000 µg/L
Isopropylbenzene: 10 to 200 µg/L
Methacrylonitrile: 10 to 200 µg/L
Methyl methacrylate: 10 to 200 µg/L
n-Butylbenzene: 10 to 200 µg/L
n-Hexane: 10 to 200 µg/L
n-Propylbenzene: 10 to 200 µg/L
p-Isopropyltoluene: 10 to 200 µg/L
Pentachloroethane: 10 to 200 µg/L
Propionitrile: 10 to 200 µg/L
sec-Butylbenzene: 10 to 200 µg/L
t-Amyl alcohol: 5 to 500 µg/L
t-Amyl methyl ether: 5 to 500 µg/L
t-Butyl alcohol: 5 to 500 µg/L
t-Butyl formate: 50 to 500 µg/L
tert-Butylbenzene: 10 to 200 µg/L
Tetrahydrofuran: 20 to 200 µg/L
trans-1,4-Dichloro-2-butene: 10 to 200 µg/L

This sample is not listed in the TNI NPW Field of Testing.
Lead time specified is for studies that have already opened. The lead time for studies that have not yet opened will be applicable once the study opens. To view study numbers and corresponding study dates, please see the 2024 Proficiency Testing Study Schedule linked under the Resources section below.