The Performance Assessment program (PAP) is a voluntary program offered as a service of the Soil Science Society of America (SSSA), Madison, WI, and operated as a part of the North American Proficiency Testing program (NAPT), and is administered by the NAPT Oversight Committee. While the PAP program is offered as a voluntary service to all soil testing laboratories, this program has been adopted by the NRCS as assurance that soil test analyses are being performed using validated testing methods. The PAP program is required by the NRCS for soil analysis laboratories analyzing soils for federal government programs involved with the development of nutrient management plans in certain Western US states.

To participate in the PAP program, participants must adhere to the PAP Ethics Declaration. When enrolling in the PAP program, please read, sign and return the Ethics Declaration.

The labs listed below have passed the Soil and/or Plant PAP Program of 2021.

PAP Information  |  PAP Ethics Document

PAP Labs Accredited for 2022

A&L Western Agricultural Labs (Soil)
1311 Woodland Ave Ste 1 Modesto CA 95351
209-529-4080 | http://www.al-labs-west.com

Agricultural Analysis Laboratory of UQAT (Soil)
79, rue côté Notre-Dame-Du-Nord QC J0Z 3B0 Canada
819-762-0971 x5913

AgSource - Bonduel (Soil)
106 N Cecil St PO Box 788 Bonduel WI 54107
715-758-2178 | http://www.agsource.com

AgSource - Harris (Soil)
300 Speedway Circle Ste 2 Lincoln NE 68502
402-476-0300 | http://www.agsource.com

AGVISE Laboratories - Benson (Soil & Plant)
902 13th St N PO Box 187 Benson MN 56215
320-849-4109 | http://www.agvise.com

AGVISE Laboratories - Northwood (Soil & Plant)
604 Hwy 15 PO Box 510 Northwood ND 58267
701-587-6010 | http://www.agvise.com

American Agricultural Lab - Olsen's Agricultural Lab (Soil & Plant)
700 W D St McCook NE 69001
308-345-3670 | http://www.amaglab.com

Brookside Laboratories, Inc. (Soil & Plant)
200 White Mountain Dr New Bremen OH 45869
419-977-2766 | http://www.blinc.com

CALMRA Soil Testing Laboratory (Soil)
130 S State St Westerville OH 43081
614-523-1005 | http://www.calmarlabs.com

Central Analytical Lab (Soil)
Oregon State University
Ag and Life Sciences #3079 Corvallis OR 97331
541-737-2187

Dairy One Soil Testing Laboratory (Soil)
730 Warren Rd Ithaca NY 14850
607-257-1272 x2039 | http://www.dairyone.com

Dellavalle Laboratory Inc. (Soil & Plant)
1910 W McKinley #110 Fresno CA 93728
559-233-6129 | http://www.dellavallelab.com

Eurofins-Cascade Analytical (Plant)
3019 GS Center Rd Wenatchee WA 98801
509-662-1888 | http://www.cascadeanalytical.com

FERTILAB (Fertilidad de Suelos S. de R.L.) (Soil & Plant)
2107 Turtle Ln Mission TX 78572
956-581-0943 | http://www.fertilab.com.mx

Grupo Integral de Servicios Fitosanitarios ENA S.A de C.V (Soil & Plant)
Emiliano Zapata #10 Col. San Luis Huexotla Texcoco de Mora MX 56250 Mexico

Kuo Testing Labs (Soil & Plant)
337 S 1st Ave Othello WA 99344
509-488-0112 | http://www.kuotestinglabs.com

Metro Wastewater Lab (Soil)
6450 York St Denver CO 80229-7499
303-286-3223 | http://www.metrowastewater.com

Midwest Laboratories (Soil)
13611 B St Omaha NE 68144-3617
402-334-7770 x374 | http://www.midwestlabs.com

MN Valley Testing Laboratories, Inc. - New Ulm (Soil & Plant)
1126 N Front St New Ulm MN 56073-0249
507-766-4705 | http://www.mvtl.com

Next Level Ag Labs LLC (Soil & Plant)
617 Pine Ave N Alpena SD 57312
605-849-5227 | https://www.nextlevelag.com

Northwest Agricultural Consultants (Soil & Plant)
2545 W Falls Ave Kennewick WA 99336
509-783-7450 | http://www.nwag.com

Regen Ag Lab (Soil & Plant)
31740 Hwy 10 Pleasanton NE 68866
308-440-7560 | www.regenaglab.com

Servi-Tech Laboratories - Amarillo (Soil & Plant)
6921 S Bell St Amarillo TX 79109
806-677-0093 | http://www.servitechlabs.com

Servi-Tech Laboratories - Dodge City (Soil & Plant)
1816 East Wyatt Earp Blvd Dodge City KS 67801-1397
620-227-7123 | http://www.servitechlabs.com

Simply Soil Testing (Soil)
20312 Lafayette Rd Burlington WA 98233
360-202-1086 | http://www.simplysoiltesting.com

SoilTest Farm Consultants (Soil & Plant)
2925 Driggs Dr Moses Lake WA 98837
509-765-1622 | http://www.soiltestlab.com

Stukenholtz Laboratory, Inc. (Soil & Plant)
2924 Addison Ave E PO Box 353 Twin Falls ID 83301
208-734-3050 | http://stukenholtz.com

United Soils, Inc. (Soil & Plant)
108 S Crystal Lane Fairbury IL 61739
815-692-2626 | www.unitedsoilsinc.com

University of Idaho Analytical Sciences Laboratory (Soil)
Holm Research Center 2222 West Sixth Street Moscow ID 83844
208-885-7900 | http://www.uidaho.edu/asl

USU Analytical Lab (Soil)
1541 N 800 E 9400 Old Main Hill Logan UT 84322-9400
435-797-2217 | http://www.usual.usu.edu

Ward Laboratories, Inc. (Soil & Plant)
4007 Cherry Ave PO Box 788 Kearney NE 68847
308-234-2418 | http://www.wardlab.com

Waters Agricultural Lab, Inc. (Soil)
4589 Hwy 61 S Vicksburg MS 39180
601-429-6456 | http://www.watersag.com

Waypoint Analytical, Illinois (Soil)
2902 Farber Rd Champaign IL 61822
217-359-7680 | http://www.waypointanalytical.com

Waypoint Analytical, Iowa (Soil)
700 Park Dr Atlantic IA 50022
901-213-2400 | http://www.waypointanalytical.com

Waypoint Analytical, LLC (Soil)
2790 Whitten Rd Memphis TN 38133
901-213-2400 | http://www.waypointanalytical.com

West Virginia Department of Agriculture (Soil)
60B Industrial Park Road Moorefield WV 26836
304-538-2397