California Weed Science Society

  • Sacramento, CA
  • Tax-exempt since March 1965
  • EIN: 94-6094047

Organization summary

Type of Nonprofit

Designated as a Labor, agricultural and horticultural organizations that are educational or instructive, including unions, created for the purpose of improving conditions of work, and products of efficiency.

Donations to this organization are not tax deductible.

Tax Filings by Year

Form 990 is an information return that most organizations claiming federal tax-exempt status must file yearly with the IRS. Nonprofit Explorer has IRS digitized Form 990 data for filings processed in 2012 and later. If this organization filed an amended return, it may not be reflected below. Duplicate download links may indicate a resubmission or amendment to this organization's original return. Form 990 data is from the IRS.

Fiscal Year Ending June
2025

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$198,470
Expenses
$158,004
Net Income
$40,466
Net Assets
$455,629
Notable Sources of Revenue Percent of Total Revenue
Contributions $0
Program Services $145,165
73.1%
Investment Income $9,965
5.0%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $43,340
21.8%
Net Inventory Sales $0
Other Revenue $0
Notable Expenses Percent of Total Expenses
Executive Compensation $0
Professional Fundraising Fees $0
Other Salaries and Wages $0
Assets/Debt
Total Assets $455,629
Total Liabilities $0
Net Assets $455,629
Compensation
Key Employees and Officers Compensation Related Other
Kristina Madden (President) $0 $0 $0
Joy Hollingsworth (Vice Preside) $0 $0 $0
Jason Robbins (Secretary) $0 $0 $0
Scott Stoddard (Past Preside) $0 $0 $0
Dave Blodget (Director) $0 $0 $0
James Hruskoci (Director) $0 $0 $0
Clebson Gomes Goncalves (Director) $0 $0 $0
Josie Hugie (Director) $0 $0 $0
Thomas Getts (Director) $0 $0 $0
Vincent Avila (Director) $0 $0 $0
+ View more people

Document Links

990
Filed on Nov. 10, 2025

Primary tax return for a nonprofit’s activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending June
2024

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$163,758
Expenses
$167,973
Net Income
-$4,215
Net Assets
$413,499
Notable Sources of Revenue Percent of Total Revenue
Contributions $0
Program Services $148,298
90.6%
Investment Income $10,934
6.7%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $4,526
2.8%
Net Inventory Sales $0
Other Revenue $0
Notable Expenses Percent of Total Expenses
Executive Compensation $0
Professional Fundraising Fees $0
Other Salaries and Wages $0
Assets/Debt
Total Assets $413,499
Total Liabilities $0
Net Assets $413,499
Compensation
Key Employees and Officers Compensation Related Other
Kristina Madden (President) $0 $0 $0
Joy Hollingsworth (Vice Preside) $0 $0 $0
Jason Robbins (Secretary) $0 $0 $0
Scott Stoddard (Past Preside) $0 $0 $0
Dave Blodget (Director) $0 $0 $0
James Hruskoci (Director) $0 $0 $0
Clebson Gomes Goncalves (Director) $0 $0 $0
Josie Hugie (Director) $0 $0 $0
Thomas Getts (Director) $0 $0 $0
Vincent Avila (Director) $0 $0 $0
+ View more people

Document Links

990
Filed on Jan. 16, 2025

Primary tax return for a nonprofit’s activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending June
2023

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$184,053
Expenses
$175,081
Net Income
$8,972
Net Assets
$396,429
Notable Sources of Revenue Percent of Total Revenue
Contributions $0
Program Services $171,561
93.2%
Investment Income $9,358
5.1%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $3,134
1.7%
Net Inventory Sales $0
Other Revenue $0
Notable Expenses Percent of Total Expenses
Executive Compensation $0
Professional Fundraising Fees $0
Other Salaries and Wages $0
Assets/Debt
Total Assets $396,429
Total Liabilities $0
Net Assets $396,429
Compensation
Key Employees and Officers Compensation Related Other
Scott Stoddard (President) $0 $0 $0
Kristina Madden (Vice Preside) $0 $0 $0
Joy Hollingsworth (Secretary) $0 $0 $0
William Patzoldt (Past Preside) $0 $0 $0
Dave Blodget (Director) $0 $0 $0
James Hruskoci (Director) $0 $0 $0
Clebson Gomes Goncalves (Director) $0 $0 $0
Josie Hugie (Director) $0 $0 $0
Thomas Getts (Director) $0 $0 $0
+ View more people

Document Links

990
Filed on Dec. 11, 2023

Primary tax return for a nonprofit’s activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending June
2022

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$154,751
Expenses
$174,073
Net Income
-$19,322
Net Assets
$376,929
Notable Sources of Revenue Percent of Total Revenue
Contributions $0
Program Services $129,832
83.9%
Investment Income $7,659
4.9%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $17,260
11.2%
Net Inventory Sales $0
Other Revenue $0
Notable Expenses Percent of Total Expenses
Executive Compensation $0
Professional Fundraising Fees $0
Other Salaries and Wages $0
Assets/Debt
Total Assets $376,929
Total Liabilities $0
Net Assets $376,929
Compensation
Key Employees and Officers Compensation Related Other
Anil Shrestha (President) $0 $0 $0
William Patzoldt (Vice Preside) $0 $0 $0
C Scott Stoddard (Secretary) $0 $0 $0
Philip Munger (Past Preside) $0 $0 $0
Dave Blodget (Director) $0 $0 $0
James Hruskoci (Director) $0 $0 $0
Whitney Brim Deforest (Director) $0 $0 $0
Eli Kersh (Director) $0 $0 $0
Thomas Getts (Director) $0 $0 $0
Katherine Walker (Director) $0 $0 $0
+ View more people

Document Links

990
Filed on Jan. 18, 2023

Primary tax return for a nonprofit’s activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending June
2021

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$129,121
Expenses
$163,662
Net Income
-$34,541
Net Assets
$465,280
Notable Sources of Revenue Percent of Total Revenue
Contributions $0
Program Services $109,624
84.9%
Investment Income $7,221
5.6%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $12,276
9.5%
Net Inventory Sales $0
Other Revenue $0
Notable Expenses Percent of Total Expenses
Executive Compensation $0
Professional Fundraising Fees $0
Other Salaries and Wages $0
Assets/Debt
Total Assets $465,280
Total Liabilities $0
Net Assets $465,280
Compensation
Key Employees and Officers Compensation Related Other
Phillip Munger (President) $0 $0 $0
Anil Shrestha (Vice Preside) $0 $0 $0
William Patzoldt (Secretary) $0 $0 $0
Brad Hanson (Past Preside) $0 $0 $0
Dave Blodget (Director) $0 $0 $0
James Hruskoci (Director) $0 $0 $0
Maggie Reiter (Director) $0 $0 $0
Eli Kersh (Director) $0 $0 $0
Thomas Getts (Director) $0 $0 $0
Katherine Walker (Director) $0 $0 $0
+ View more people

Document Links

990
Filed on Dec. 13, 2021

Primary tax return for a nonprofit’s activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending June
2020

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$180,670
Expenses
$146,813
Net Income
$33,857
Net Assets
$439,859
Notable Sources of Revenue Percent of Total Revenue
Contributions $0
Program Services $170,415
94.3%
Investment Income $7,910
4.4%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $1,745
1.0%
Net Inventory Sales $0
Other Revenue $600
0.3%
Notable Expenses Percent of Total Expenses
Executive Compensation $0
Professional Fundraising Fees $0
Other Salaries and Wages $0
Assets/Debt
Total Assets $439,859
Total Liabilities $0
Net Assets $439,859
Compensation
Key Employees and Officers Compensation Related Other
Dave Blodget (Director) $0 $0 $0
Thomas Getts (Director) $0 $0 $0
Brad Hanson (Past Preside) $0 $0 $0
James Hruskoci (Director) $0 $0 $0
Eli Kersh (Director) $0 $0 $0
Phillip Munger (President) $0 $0 $0
William Patzoldt (Secretary) $0 $0 $0
Maggie Reiter (Director) $0 $0 $0
Anil Shrestha (Vice Preside) $0 $0 $0
Katherine Walker (Director) $0 $0 $0
+ View more people

Document Links

990
Filed on Oct. 28, 2020

Primary tax return for a nonprofit’s activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending June
2019

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$157,598
Expenses
$152,308
Net Income
$5,290
Net Assets
$406,627
Notable Sources of Revenue Percent of Total Revenue
Contributions $0
Program Services $146,153
92.7%
Investment Income $8,421
5.3%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $3,024
1.9%
Net Inventory Sales $0
Other Revenue $0
Notable Expenses Percent of Total Expenses
Executive Compensation $0
Professional Fundraising Fees $0
Other Salaries and Wages $0
Assets/Debt
Total Assets $406,627
Total Liabilities $0
Net Assets $406,627
Compensation
Key Employees and Officers Compensation Related Other
Brad Hanson (President) $0 $0 $0
Phillip Munger (Vice Preside) $0 $0 $0
Anil Shrestha (Secretary) $0 $0 $0
Joseph Vassios (Past Preside) $0 $0 $0
Dave Blodget (Director) $0 $0 $0
Lynn Sosnoskie (Director) $0 $0 $0
Whitney Brim Deforest (Director) $0 $0 $0
Eli Kersh (Director) $0 $0 $0
Thomas Getts (Director) $0 $0 $0
Gil Del Rosario (Director) $0 $0 $0
+ View more people

Document Links

990
Filed on Nov. 8, 2019

Primary tax return for a nonprofit’s activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending June
2018

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$151,903
Expenses
$154,923
Net Income
-$3,020
Net Assets
$391,292
Notable Sources of Revenue Percent of Total Revenue
Contributions $0
Program Services $142,706
93.9%
Investment Income $6,597
4.3%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $712
0.5%
Sales of Assets $1,888
1.2%
Net Inventory Sales $0
Other Revenue $0
Notable Expenses Percent of Total Expenses
Executive Compensation $0
Professional Fundraising Fees $0
Other Salaries and Wages $0
Assets/Debt
Total Assets $391,292
Total Liabilities $0
Net Assets $391,292
Compensation
Key Employees and Officers Compensation Related Other
Joseph Vassios (President) $0 $0 $0
Travis Bean (Vice President/Program Chair) $0 $0 $0
Ben Duesterhaus (Director) $0 $0 $0
Phillip Munger (Secretary) $0 $0 $0
Maryam Khosravifard (Past President) $0 $0 $0
Dave Blodget (Director) $0 $0 $0
Whitney Brim Deforest (Director) $0 $0 $0
Eli Kersh (Director) $0 $0 $0
Mariano Galla (Director) $0 $0 $0
Gil Del Rosario (Director) $0 $0 $0
+ View more people

Document Links

990
Filed on Sept. 4, 2018

Primary tax return for a nonprofit’s activities, finances, and governance

View Filing
XML

Fiscal Year Ending June
2017

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$159,740
Expenses
$141,079
Net Income
$18,661
Net Assets
$387,733
Notable Sources of Revenue Percent of Total Revenue
Contributions $9,401
5.9%
Program Services $151,083
94.6%
Investment Income $1,592
1.0%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $330
0.2%
Sales of Assets -$2,676
Net Inventory Sales $0
Other Revenue $10
0.0%
Notable Expenses Percent of Total Expenses
Executive Compensation $0
Professional Fundraising Fees $0
Other Salaries and Wages $0
Assets/Debt
Total Assets $387,733
Total Liabilities $0
Net Assets $387,733
Compensation
Key Employees and Officers Compensation Related Other
Maryam Khosravifard (President) $0 $0 $0
Joseph Vassios (Vice President/Program Chair) $0 $0 $0
Ben Duesterhaus (Director) $0 $0 $0
Travis Bean (Secretary) $0 $0 $0
Katherine Walker (Past President) $0 $0 $0
Dave Blodget (Director) $0 $0 $0
Whitney Brim (Director) $0 $0 $0
Josie Hugie (Director) $0 $0 $0
Scott Oneto (Director) $0 $0 $0
Gil Del Rosario (Director) $0 $0 $0
+ View more people

Document Links

990
Filed on Oct. 6, 2017

Primary tax return for a nonprofit’s activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending June
2016

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$155,414
Expenses
$135,254
Net Income
$20,160
Net Assets
$341,652
Notable Sources of Revenue Percent of Total Revenue
Contributions $11,350
7.3%
Program Services $138,428
89.1%
Investment Income $5,181
3.3%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $864
0.6%
Sales of Assets -$409
Net Inventory Sales $0
Other Revenue $0
Notable Expenses Percent of Total Expenses
Executive Compensation $0
Professional Fundraising Fees $0
Other Salaries and Wages $0
Assets/Debt
Total Assets $341,652
Total Liabilities $0
Net Assets $341,652
Compensation
Key Employees and Officers Compensation Related Other
John Roncoroni (Past President) $0 $0 $0
Maryam Khosravifard (Vice President) $0 $0 $0
Ben Duesterhaus (Director) $0 $0 $0
Dave Blodget (Director) $0 $0 $0
Scott Oneto (Director) $0 $0 $0
Gil Del Rosario (Director) $0 $0 $0
Josie Hugie (Director) $0 $0 $0
Katherine Walker (President) $0 $0 $0
Joe Vassios (Secretary) $0 $0 $0
Judy Letterman (Executive Dir.) $0 $0 $0
+ View more people

Document Links

990
Filed on Sept. 12, 2016

Primary tax return for a nonprofit’s activities, finances, and governance

View Filing
PDF XML
PDF (2 of 2)

Fiscal Year Ending June
2015

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$156,137
Expenses
$145,944
Net Income
$10,193
Net Assets
$331,366
Notable Sources of Revenue Percent of Total Revenue
Contributions $10,426
6.7%
Program Services $135,142
86.6%
Investment Income $11,863
7.6%
Net Fundraising $318
0.2%
Sales of Assets -$1,745
Net Inventory Sales $0
Other Revenue $133
0.1%
Assets/Debt
Total Assets $331,366
Total Liabilities $0
Net Assets $331,366
Compensation
Key Employees and Officers Compensation Other
Rick Miller (Past President) $0 $0
John Roncoroni (President) $0 $0
Maryam Khosravifard (Secretary) $0 $0
Ben Duesterhaus (Director) $0 $0
Dave Blodget (Director) $0 $0
Lynn Sosnoskie (Director) $0 $0
Scott Oneto (Director) $0 $0
Gil Del Rosario (Director) $0 $0
Josie Hugie (Director) $0 $0
Katherine Walker (Vice President) $0 $0
+ View more people

Document Links

990

Primary tax return for a nonprofit’s activities, finances, and governance

PDF
990-EZ
Filed on Nov. 13, 2015

Short form tax return for a nonprofit’s activities, finances, and governance

View Filing
XML

Fiscal Year Ending June
2014

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$165,733
Expenses
$143,650
Net Income
$22,083
Net Assets
$323,092
Notable Sources of Revenue Percent of Total Revenue
Contributions $10,700
6.5%
Program Services $137,181
82.8%
Investment Income $7,848
4.7%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $544
0.3%
Sales of Assets $8,477
5.1%
Net Inventory Sales $0
Other Revenue $983
0.6%
Notable Expenses Percent of Total Expenses
Executive Compensation $0
Professional Fundraising Fees $0
Other Salaries and Wages $0
Assets/Debt
Total Assets $323,092
Total Liabilities $0
Net Assets $323,092
Compensation
Key Employees and Officers Compensation Related Other
Rick Miller (President) $0 $0 $0
John Roncoroni (Vice President) $0 $0 $0
Curtis Rainbolt (Secretary) $0 $0 $0
Steve Fennimore (Director) $0 $0 $0
Dave Blodget (Director) $0 $0 $0
Jesse Richardson (Director) $0 $0 $0
Steve Orloff (Director) $0 $0 $0
Josie Hugie (Director) $0 $0 $0
Oleg Daugovish (Director) $0 $0 $0
Kate Walker (Director) $0 $0 $0
+ View more people

Document Links

990
Filed on Jan. 12, 2015

Primary tax return for a nonprofit’s activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending June
2013

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$158,065
Expenses
$148,771
Net Income
$9,294
Net Assets
$295,822
Notable Sources of Revenue Percent of Total Revenue
Contributions $10,500
6.6%
Program Services $136,407
86.3%
Investment Income $10,268
6.5%
Net Fundraising $400
0.3%
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Assets/Debt
Total Assets $295,822
Total Liabilities $0
Net Assets $295,822

Document Links

990-EZ
Filed on July 1, 2014

Short form tax return for a nonprofit’s activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending June
2012

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$122,257
Expenses
$131,380
Net Income
-$9,123
Net Assets
$286,528
Notable Sources of Revenue Percent of Total Revenue
Contributions $10,750
8.8%
Program Services $104,541
85.5%
Investment Income $5,497
4.5%
Net Fundraising $1,049
0.9%
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Assets/Debt
Total Assets $286,626
Total Liabilities $98
Net Assets $286,528

Document Links

990-EZ

Short form tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending June
2011

No Extracted Financial Data

Extracted financial data is not available for the forms filed in this tax period, but Form 990 documents are available for download.

Document Links

990-EZ

Short form tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending June
2010

No Extracted Financial Data

Extracted financial data is not available for the forms filed in this tax period, but Form 990 documents are available for download.

Document Links

990-EZ

Short form tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending June
2009

No Extracted Financial Data

Extracted financial data is not available for the forms filed in this tax period, but Form 990 documents are available for download.

Document Links

990-EZ

Short form tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending June
2008

No Extracted Financial Data

Extracted financial data is not available for the forms filed in this tax period, but Form 990 documents are available for download.

Document Links

990

Primary tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending June
2007

No Extracted Financial Data

Extracted financial data is not available for the forms filed in this tax period, but Form 990 documents are available for download.

Document Links

990

Primary tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending June
2006

No Extracted Financial Data

Extracted financial data is not available for the forms filed in this tax period, but Form 990 documents are available for download.

Document Links

990

Primary tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending June
2005

No Extracted Financial Data

Extracted financial data is not available for the forms filed in this tax period, but Form 990 documents are available for download.

Document Links

990

Primary tax return for a nonprofit’s activities, finances, and governance

PDF

About This Data

What Is This Data?

Nonprofit Explorer includes summary data for nonprofit tax returns and full Form 990 documents, in both PDF and digital formats.

The summary data contains information processed by the IRS during the 2012-2019 calendar years; this generally consists of filings for the 2011-2018 fiscal years, but may include older records. This data release includes only a subset of what can be found in the full Form 990s.

In addition to the raw summary data, we link to PDFs and digital copies of full Form 990 documents wherever possible. This consists of separate releases by the IRS of Form 990 documents processed by the agency, which we update regularly.

We also link to copies of audits nonprofit organizations that spent $750,000 or more in Federal grant money in a single fiscal year since 2016. These audits are copied from the Federal Audit Clearinghouse.

Which Organizations Are Here?

Every organization that has been recognized as tax exempt by the IRS has to file Form 990 every year, unless they make less than $200,000 in revenue and have less than $500,000 in assets, in which case they have to file form 990-EZ. Organizations making less than $50,000 don’t have to file either form but do have to let the IRS they’re still in business via a Form 990N "e-Postcard."

Nonprofit Explorer has organizations claiming tax exemption in each of the 27 subsections of the 501(c) section of the tax code, and which have filed a Form 990, Form 990EZ or Form 990PF. Taxable trusts and private foundations that are required to file a form 990PF are also included. Small organizations filing a Form 990N "e-Postcard" are not included in this data.

Types of Nonprofits

There are 27 nonprofit designations based on the numbered subsections of section 501(c) of the tax code. See the list »

Get the Data

For those interested in acquiring the original data from the source, here’s where our data comes from:

  • Raw filing data. Includes EINs and summary financials as structured data.
  • Exempt Organization profiles. Includes organization names, addresses, etc. You can merge this with the raw filing data using EIN numbers.
  • Form 990 documents. Prior to 2017, these documents were obtained and processed by Public.Resource.org and ProPublica. Bulk PDF downloads since 2017 are available from the IRS.
  • Form 990 documents as XML files. Includes complete filing data (financial details, names of officers, tax schedules, etc.) in machine-readable format. Only available for electronically filed documents. Electronic data released prior to October 2021 is also available through Amazon Web Services.
  • Audits. PDFs of single or program-specific audits for nonprofit organizations that spent $750,000 or more in Federal grant money in a single fiscal year. Available for fiscal year 2015 and later.

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About Nonprofit Explorer

Nonprofit Explorer

Browse millions of annual returns filed by tax-exempt organizations with ProPublica’s Nonprofit Explorer. See details like executive compensation, revenue, expenses and more. Search for an organization or a person, or search the full text of filings.

By Andrea Suozzo, Alec Glassford, Ash Ngu and Brandon Roberts.

Design by Jeff Frankl. Additional development by Ken Schwencke, Mike Tigas, and Sisi Wei.

E-file viewer adapted from IRS e-File Viewer by Ben Getson. Code for scraping audit documents adapated from Govwiki.

Updated