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2025 Proficiency Study Schedule

ISO 17043-Accredited PT Programs Available:

Environmental PT

  • Matrices: Drinking Water, Wastewater, Soil, Sludge, Hazardous Waste
  • Analytes: Comprehensive, US EPA-centered

Food PT

  • Matrices: Meat, Dairy, Grain
  • Analytes: Nutritional Proximates, Elements, Allergens

Nutraceutical & Cannabis PT

  • Matrices: Plant Material, Oil, Chocolate Edible
  • Analytes: Comprehensive


Non Potable Water - Wastewater - Chemistry PT Studies

Study NumberStudy Open Date
Shipping Samples		Study Close Date
Results due 24:00 EST (GMT-5)		Final Reports Available
21 days after study closure
Last Order Date USA
Last Order Date International
Outside USA
WP-305*Jan 15, 2025Feb 28, 2025Mar 21, 2025Feb 21, 2025Feb 14, 2025
WP-3061Mar 12, 2025Apr 25, 2025May 09, 2025Apr 18, 2025Apr 11, 2025
WP-307*Apr 16, 2025May 30, 2025Jun 20, 2025May 23, 2025May 16, 2025
WP-308May 07, 2025Jun 20, 2025Jul 11, 2025Jun 13, 2025Jun 06, 2025
WP-309*Jul 16, 2025Aug 29, 2025Sep 19, 2025Aug 22, 2025Aug 15, 2025
WP-3102Aug 06, 2025Sep 19, 2025Oct 10, 2025Sep 12, 2025Sep 05, 2025
WP-311*Oct 08, 2025Nov 21, 2025Dec 12, 2025Nov 14, 2025Nov 07, 2025
WP-312Nov 05, 2025Dec 19, 2025Jan 09, 2026Dec 12, 2025Dec 05, 2025
  • *Denotes Full Organic & Inorganic Studies. The others are Inorganic Only PT Studies.
  • 1This study number complies with NJ DEP March non-potable water PT study schedule. NJ DEP complaint analysis should occur between March 1st and April 25th 2025. Final graded reports will be submitted to NJ DEP on May 9th 2025.
  • 2This study number complies with NJ DEP September non-potable water PT study schedule. NJ DEP complaint analysis should occur between September 1st and September 19th 2025.  Final graded reports will be submitted to NJ DEP on November 14th 2025.


Non-Potable Water (NPW) Microbiological Proficiency Test Studies

Study NumberStudy Open Date
Shipping Samples		Study Close Date
Results due 24:00 EST (GMT-5)		Final Reports Available
21 days after study closure
Last Order Date USA
Last Order Date International
Outside USA
MP-207Jan 14, 2025Feb 27, 2025Mar 20, 2025Feb 20, 2025Feb 13, 2025
MP-2083
Mar 11, 2025Apr 24, 2025May 09, 2025Apr 17, 2025Apr 10, 2025
MP-209Apr 08, 2025May 22, 2025Jun 12, 2025May 15, 2025May 08, 2025
MP-210Jul 09, 2025Aug 22, 2025Sep 12, 2025Aug 15, 2025Aug 08, 2025
MP-211Sep 03, 2025Oct 17, 2025Nov 07, 2025Oct 10, 2025Oct 03, 2025
MP-212Oct 21, 2025Dec 04, 2025Dec 25, 2025Nov 27, 2025Nov 20, 2025
  • 3This study number complies with NJ DEP March non-potable water PT study schedule.  NJ DEP complaint analysis should occur between March 11th and April 24th 2025.  Final graded reports will be submitted to NJ DEP on May 9th 2025.


DMRQA-45 Study

Study NumberStudy Open Date
Shipping Samples		Study Close Date
Results due 24:00 EST (GMT-5)		Final Reports Available
21 days after study closure
Last Order Date USALast Order Date International Outside USA
DMRQA-45*TBA Tentatively Apr 1, 2025
TBA Tentatively Aug 31, 2025TBATBA Tentatively Aug 31, 2025TBA Tentatively Aug 31, 2025
  • *DMRQA study schedule will be posted on the website when announced by the US EPA.


Potable Water - Drinking Water Chemistry PT Studies

Study NumberStudy Open Date
Shipping Samples		Study Close Date
Results due 24:00 EST (GMT-5)		Final Reports Available
21 days after study closure
Last Order Date USA
Last Order Date International
Outside USA
WS-1414Jan 08, 2025Feb 21, 2025Mar 14, 2025Feb 14, 2025Feb 07, 2025
WS-142Apr 02, 2025May 16, 2025Jun 06, 2025May 09, 2025May 02, 2025
WS-1435Jul 02, 2025Aug 15, 2025Sep 05, 2025Aug 08, 2025Aug 01, 2025
WS-144Oct 13, 2025Nov 26, 2025Dec 17, 2025Nov 19, 2025Nov 12, 2025
  • 4This study number complies with NJ DEP January drinking water PT study schedule.  NJ DEP complaint analysis should occur between January 8th and February 21st 2025.   Final graded reports will be submitted to NJ DEP on March 14th 2025.
  • 5This study number complies with NJ DEP July drinking water PT study schedule.  NJ DEP complaint analysis should occur between July 2nd and August 15th 2025.  Final graded reports will be submitted to NJ DEP on September 5th 2025.


Potable Water - Drinking Water - Microbiological PT Studies

Study NumberStudy Open Date
Shipping Samples		Study Close Date
Results due 24:00 EST (GMT-5)		Final Reports Available
21 days after study closure
Last Order Date USA
Last Order Date International Outside
MS-2496Jan 07, 2025Feb 20, 2025Mar 13, 2025Feb 13, 2025Feb 06, 2025
MS-250*Mar 04, 2025Apr 03, 2025Apr 24, 2025Mar 27, 2025Mar 20, 2025
MS-251Apr 01, 2025May 15, 2025Jun 05, 2025May 08, 2025May 01, 2025
MS-252*Jun 03, 2025Jul 03, 2025Jul 24, 2025Jun 26, 2025Jun 19, 2025
MS-2537July 08, 2025Aug 21, 2025Sep 05, 2025Aug 14, 2025Aug 07, 2025
MS-254*Sep 02, 2025Oct 02, 2025Oct 23, 2025Sep 25, 2025Sep 18, 2025
MS-255Oct 07, 2025Nov 20, 2025Dec 11, 2025Nov 13, 2025Nov 06, 2025
MS-256*Nov 04, 2025Dec 04, 2025Dec 25, 2025Nov 27, 2025Nov 20, 2025

  • * MIC-002, MIC-006, MIC-007, and MIC-009 and MIC-018 are not available during these studies.
  • 6This study number complies with NJ DEP January drinking water PT study schedule.  NJ DEP complaint analysis should occur between January 2nd and February 15th 2025.   Final graded reports will be submitted to NJ DEP March 13, 2025.
  • 7This study number complies with NJ DEP July drinking water PT study schedule.  NJ DEP complaint analysis should occur between July 8th and August 21st 2025.  Final graded reports will be submitted to NJ DEP on September 5th 2025.


Underground Storage Tank PT Studies

Study NumberStudy Open Date
Shipping Samples		Study Close Date
Results due 24:00 EST (GMT-5)		Final Reports Available
Maximum 30 days after study closure

Last Order Date USA

Last Order Date International
Outside USA
UST-123Feb 05, 2025Mar 21, 2025Apr 20, 2025Mar 14, 2025Mar 07, 2025
UST-124Mar 25, 2025May 08, 2025Jun 07, 2025May 01, 2025Apr 24, 2025
UST-125Aug 20, 2025Oct 03, 2025Nov 02, 2025Sep 26, 2025Sep 19, 2025
UST-126Oct 22, 2025Dec 05, 2025Jan 04, 2026Nov 28, 2025Nov 21, 2025


Soil/Hazardous Waste

Study NumberStudy Open Date
Shipping Samples		Study Close Date
Results due 24:00 EST (GMT-5)		Final Reports Available
Maximum 30 days after study closure

Last Order Date USA

Last Order Date International
Outside USA
SM-144Feb 05, 2025Mar 21, 2025Apr 11, 2025Mar 14, 2025Mar 07, 2025
SM-1458Mar 25, 2025May 08, 2025May 29, 2025May 01, 2025Apr 24, 2025
SM-146Aug 20, 2025Oct 03, 2025Oct 24, 2025Sept 26, 2025Sep 19, 2025
SM-147Oct 22, 2025Dec 05, 2025Dec 23, 2025Nov 28, 2025Nov 21, 2025
  • 8This study number complies with NJ DEP April solid/chemical matrix PT study schedule.  NJ DEP complaint analysis should occur between April 1st and May 8th 2025.  Final graded reports will be submitted to NJ DEP on May 29th 2025.


Food Science PT Studies

Study NumberStudy Open Date
Shipping Samples		Study Close Date
Results due 24:00 EST (GMT-5)		Final Reports Available
Maximum 30 days after study closure
Last Order Date USA
Last Order Date International
Outside USA
FS-0225Feb 12, 2025Mar 28, 2025Apr 27, 2025Mar 21, 2025Mar 14, 2025
FS-0525May 06, 2025Jun 19, 2025Jul 19, 2025Jun 12, 2025Jun 05, 2025
FS-0825Aug 06, 2025Sep 19, 2025Oct 19, 2025Sep 12, 2025Sep 05, 2025
FS-1125Nov 05, 2025Dec 19, 2025Jan 18, 2026Dec 12, 2025Dec 05, 2025


Hemp Cannabis Science PT Studies

Study NumberStudy Open Date
Shipping Samples		Study Close Date
Results due 24:00 EST (GMT-5)		Final Reports Available
Maximum 30 days after study closure

Last Order Date USA

Last Order Date International
Outside USA
HEMP-0325Mar 26, 2025May 09, 2025Jun 08, 2025May 02, 2025Apr 25, 2025
HEMP-0925Sep 23, 2025Nov 06, 2025Dec 06, 2025Oct 30, 2025Oct 23, 2025


EMERALD Test PT Studies (Order via Emerald Scientific)

Study NumberStudy Open Date
Shipping Samples		Study Close Date
Results due 24:00 EST (GMT-5)		Final Reports Available
Maximum 30 days after study closure
CM-0325Announced by Emerald ScientificAnnounced by Emerald ScientificAnnounced by Emerald Scientific
CM-0925Announced by Emerald ScientificAnnounced by Emerald Scientific

Announced by Emerald Scientific

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