1.3 Certification, Commercial Licensing, Recordkeeping, and Posting Standards

Certification, Commercial Licensing, Recordkeeping, and Posting Standards

To ensure that chemical pesticides are handled with technical competence, environmental awareness, and rigorous safety protocols, the State of Wisconsin maintains a comprehensive certification, licensing, recordkeeping, and public notification system. Governed by Wisconsin Statutes Chapter 94 and Wisconsin Administrative Code ATCP 29, these requirements establish distinct legal obligations based on whether an individual applies pesticides as a private agricultural producer, a commercial for-hire contractor, or an in-house institutional groundskeeper.

Applicators must understand the operational boundaries of each license type, maintain legally defensible application logs, and execute mandatory posting and advance notification protocols to protect sensitive individuals and the general public.

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1. Private vs. Commercial Applicator Classifications

Wisconsin law divides pesticide applicators into two primary legal categories: Private Applicators and Commercial Applicators (which are further divided into For-Hire and Not-For-Hire).

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|                     WISCONSIN APPLICATOR CLASSIFICATIONS                    |
|                                                                             |
|   [PRIVATE APPLICATOR]      ---> Produces an AGRICULTURAL COMMODITY on      |
|                                  land owned or rented by self or employer.  |
|                                  (Certification required for RUPs).         |
|                                                                             |
|   [COMMERCIAL FOR-HIRE]     ---> Applies pesticides for COMPENSATION on     |
|                                  someone else's property (lawn care, custom |
|                                  ag, structural pest control).              |
|                                  (Certification & ANNUAL LICENSE required   |
|                                  for ALL applications, General Use & RUP).  |
|                                                                             |
|   [COMMERCIAL NOT-FOR-HIRE] ---> Applies pesticides on EMPLOYER'S property  |
|                                  without separate billing (golf courses,    |
|                                  municipal parks, rights-of-way).           |
|                                  (Certification required for RUPs or        |
|                                  powered equipment on public/school sites). |
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1. Private Applicators

A Private Applicator is defined as an individual who applies or directs the use of pesticides for the purpose of producing an agricultural commodity (e.g., corn, soybeans, cranberries, dairy forage, fruit, nursery stock, timber, livestock) on property owned or rented by the applicator or their employer.

• Certification Requirement: Required if purchasing, mixing, loading, or applying Restricted Use Pesticides (RUPs). If a private grower uses only General Use Pesticides, state certification is not legally mandated (though highly recommended).
• Credential Validity: Certification is valid for 5 years upon passing the written exam.

2. Commercial Applicators For-Hire

A Commercial Applicator For-Hire applies pesticides directly to the property of another person for financial compensation, contract billing, or trade value (e.g., custom agricultural applicators, commercial lawn care services, tree care specialists, structural exterminators).

• Mandatory Credentialing: Must be both certified and individually licensed, regardless of whether they apply General Use Pesticides or Restricted Use Pesticides.
• Individual Annual License: Commercial applicators must renew the Individual Commercial Applicator License (ICAL) every year. The license runs January 1 to December 31 and costs a $40 base fee plus the Agricultural Chemical Cleanup Program (ACCP) surcharge. DATCP resets the ACCP surcharge each May 1 based on the balance of the cleanup fund: it was $5 for the 2026 license year (total $45) and rises to $10 for the 2027 license year (total $50). Government and educational-institution applicators are exempt from the fee.
• Commercial Business License: The employing business entity must also hold an annual Pesticide Business License for each location: $70 base plus the ACCP surcharge ($10 for 2026, so $80 total; $20 for 2027, so $90 total). A location that manufactures or distributes bulk pesticide pays an additional bulk-storage surcharge.
• Reciprocal License: An applicator certified in another state may apply for a Wisconsin reciprocal license instead: $75 certification plus $40 license plus the ACCP surcharge ($120 for the 2026 license year).

3. Commercial Applicators Not-For-Hire

A Commercial Applicator Not-For-Hire applies pesticides to property owned or controlled by their employer as part of their job duties, without charging a separate fee to a third party (e.g., golf course superintendents, municipal park workers, state highway right-of-way crews, school district maintenance staff).

• Licensing Threshold: Must be certified and licensed if applying Restricted Use Pesticides, or if applying any pesticide with powered equipment on public school grounds, government lands, or recreational facilities.

Certification Examination Logistics

• Training Materials First: Every candidate must buy the UW PAT manual (or the self-paced online course) for the category they intend to test in. The manual carries a six-digit PAT number, and DATCP and Pearson VUE both require that number to register for the exam.
• Exam Administration: DATCP administers the certification exam. Commercial candidates schedule either a free paper exam at a DATCP proctored site or a computer-based Pearson VUE exam for a $45 convenience fee, available at more than 50 Wisconsin test centers or online with a webcam. Private applicators schedule the paper exam through a participating county Extension office at no cost. UW PAT also runs seasonal training sessions that end with the exam.
• Format: Approximately 70 multiple-choice questions in 90 minutes. The commercial exam is closed book; the private applicator exam is open book, but online private candidates read an on-screen PDF of the manual instead of the printed copy. A basic calculator is allowed; cell-phone, programmable, alphabet-keypad, and AC-powered calculators are not.
• No Separate Core Exam: Wisconsin does not administer a stand-alone core exam. One exam per category covers the ATCP 29.30 general standards and the category material, which is why the same general safety, label, environment, and calculation content appears on every Wisconsin exam.
• Passing Standard: A minimum of 70% correct, for both commercial and private candidates.
• Retake Rules: A failed first attempt may be retaken after a 24-hour wait. Failing a second or third retake triggers a 30-day wait. Four failures within a 6-month period trigger a 6-month wait from the last failed attempt.
• Results: Exams graded at DATCP in Madison are scored immediately; exams taken elsewhere are graded within about two weeks, and DATCP mails results within 30 days. Pearson VUE candidates see results at the end of the session.
• Certification Cycle: Certification is valid for 5 years. Wisconsin does not accept continuing education credits toward pesticide applicator recertification: at the end of the cycle you buy a current manual and take the exam again, exactly as you did the first time.
• Minimum Age: Under the ATCP 29 amendments effective July 1, 2026, DATCP may not issue a private certification, a commercial certification, or an individual commercial applicator license to anyone under 18 years old. Applicators certified or licensed before that date while under 18 are grandfathered.

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2. Wisconsin Commercial Certification Categories

To ensure specialized technical competence, commercial certification is broken into distinct subject-matter categories under ATCP 29.31, and DATCP currently lists 20 categories and subcategories. Applicators must hold certification in the specific category matching their work:

DATCP also certifies 1.3 Livestock & Poultry, 3.1 Greenhouse & Nursery, 4.0 Seed Treatment, 5.1 Antifouling Paints, 7.4 Wood Preservation, 7.5 Sewer Line Root Control, 11.0 Companion Animals, and 24.0 Mixer & Loader, plus three subcategories that require a base certification first: 9.9 Aerial Applicator, 25.0 Soil Fumigation, and 26.0 Chemigation. Soil fumigation and aerial/chemigation subcategories carry their own supplementary competency standards under ATCP 29.29.

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3. Mandatory Recordkeeping Elements under ATCP 29.33

Accurate recordkeeping is a mandatory legal requirement that protects public health, verifies regulatory compliance, and provides essential data in the event of suspected drift, spill, or exposure investigations.

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|              ATCP 29.33(3) MANDATORY RECORD CONTENTS (9 ITEMS)              |
|                                                                             |
|   (a)  First and last name of the individual making the application         |
|   (am) Certification number of that individual  [NEW, eff. 7-1-2026]        |
|   (b)  Name and address of the customer, if any                             |
|   (c)  Crop, commodity, or site treated                                     |
|   (d)  Specific description of the application site location                |
|   (e)  Month, day, year + approximate START and ENDING time                 |
|   (f)  Brand/product/common chemical name AND EPA registration number       |
|   (g)  EITHER concentration + total quantity applied,                       |
|        OR product per unit area + total area treated                        |
|   (h)  Each mixing/loading location (unless a licensed business location)    |
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The Nine Required Record Contents (ATCP 29.33(3))

Wisconsin's record rule is deliberately short, and exam questions reward knowing exactly what is on the list — and what is not. A licensed individual commercial applicator must make the record on the day of the application (ATCP 29.33(1)); a private applicator must record every restricted-use pesticide application (ATCP 29.33(2)). The record must contain all of the following:

1. (a) Applicator name. The first and last name of the individual who made the application.
2. (am) Certification number. The certification number of that individual. This element was added to ATCP 29.33 effective July 1, 2026 — older manuals and older sample record forms do not show it.
3. (b) Customer. The name and address of the customer, if any. A private applicator treating their own crop has no customer and leaves this blank.
4. (c) Crop, commodity, or site. What was treated — for example "field corn," "golf green," or "warehouse."
5. (d) Location description. A specific description of where the application site is, detailed enough that an inspector can readily find it. A field map satisfies this, but the rule requires a sufficient description, not a map.
6. (e) Date and time. The month, day, year, and the approximate starting and ending time of the application. The rule says approximate, not exact.
7. (f) Product identity. The brand name, product name, or common chemical name of each pesticide applied, and the federal EPA registration number of each.
8. (g) Amount applied — either form. At least one of: (1) the concentration and total quantity of each pesticide applied, or (2) the amount of product per unit area and the total area treated. You choose one method; you do not have to record both.
9. (h) Mixing and loading sites. Each location, other than a licensed business location, at which the pesticide was mixed or loaded. This element is waived when the pesticide is applied straight from a prepackaged retail container or with equipment holding no more than 5 gallons of liquid or 50 pounds of dry pesticide.

Trap: Formulation type, target pest, weather conditions, and a field map are all good professional practice and appear on most commercial record forms — but ATCP 29.33(3) does not require them. Conversely, applicators routinely forget the mixing/loading site (h) and the new certification number (am). Records must be made available to DATCP for inspection and copying on request (ATCP 29.33(4)).

Mandatory Record Retention Periods

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|                         RECORD RETENTION SCHEDULES                          |
|                                                                             |
|   [GENERAL ATCP 29 APPLICATIONS] ===========> RETAIN FOR AT LEAST 2 YEARS   |
|   (All standard commercial & private RUP applications)                      |
|                                                                             |
|   [ATCP 30 ATRAZINE APPLICATIONS] ==========> RETAIN FOR AT LEAST 3 YEARS   |
|   (Wisconsin Atrazine Rule compliance records)                              |
+-----------------------------------------------------------------------------+

• General Pesticides (ATCP 29): Records must be retained for at least 2 years from the date of application and made available to DATCP inspectors upon request.
• Atrazine Records (ATCP 30): Because atrazine is subject to strict statewide groundwater protection rules and localized prohibition areas, all records of atrazine applications must be retained for at least 3 years.

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4. Posting and Notification Standards: Agricultural WPS vs. ATCP 29 Landscape

Posting treated areas alerts workers, clients, neighbors, and the general public to stay off treated surfaces until residues have dried or the Restricted-Entry Interval has expired.

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|                        POSTING STANDARD COMPARISON                          |
|                                                                             |
|   [WPS AGRICULTURAL FIELD POSTING]          [WISCONSIN TURF / LANDSCAPE]    |
|   - 14" x 16" standard sign                 - Minimum 4" x 5" sign          |
|   - DANGER / PELIGRO + stop-hand face       - Red lettering on white,       |
|   - Posted at all normal points of            per ATCP 29 Appendix B        |
|     worker entry                            - Posted before the application |
|   - Up before application, through the        at every point of significant |
|     entire REI, down within 3 days            potential human access        |
|     after the REI ends                      - Stays up until sunset of the  |
|                                               NEXT day, or REI end, later   |
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1. WPS Agricultural Field & Greenhouse Posting

• Sign Design: Standardized 14x16 inch red, white, and black signs bearing "DANGER / PELIGRO - PESTICIDES / PESTICIDAS - KEEP OUT / NO ENTRE" and the universal stern face / raised hand symbol.
• Placement: Posted at all normal points of worker entry to treated agricultural fields, orchards, or enclosed greenhouses prior to application.
• Removal: Signs must remain posted throughout the application and the entire Restricted-Entry Interval (REI), and must be removed within 3 days after REI expiration.

2. Wisconsin ATCP 29 Landscape Posting (ATCP 29.56)

A landscape pesticide under ATCP 29.56 is a pesticide labeled for use on a landscape — turf, ornamental plantings, and mulched areas at residential, commercial, public, and recreational sites. The definition deliberately excludes utility rights-of-way, greenhouses, nurseries, and agricultural production areas, which are governed by other rules.

Before the first application of the season, a landscape applicator must also offer the customer pre-application information (ATCP 29.51(4)(a) and ATCP 29.56(2)): the brand, product, or common chemical name of the pesticides that may be used, copies of the labels on request, and the application date. After the application, the applicator supplies the customer information required by ATCP 29.22.

3. Wisconsin Landscape Pre-Application Notification Registry (ATCP 29.56(7))

Wisconsin maintains a statewide registry that lets any resident ask for advance notice of commercial landscape applications on their own block or an immediately adjacent block. The registry is ATCP 29.56(7) — note that ATCP 29.55 is a different rule covering commercial applications to residential structures.

• Registration Window: Individuals register with DATCP by February 1 each year, using a department form; DATCP's open enrollment runs November 1 to February 1. Each annual registry runs March 15 through March 14 of the following year, so a registration filed in January takes effect the following March 15.
• The 12-Hour Notice: A commercial landscape applicator must contact each registered person on the applicable parcels at least 12 hours before the landscape application. Mosquito spraying counts as a landscape application for this purpose.
• Notice Content: The advance notice must include the address to be treated, the scheduled application date, the name, address, and telephone number of the business making the application, and the pesticides that may be used (brand name, product name, or common chemical name). An EPA registration number is not required in this notice.
• Related Bee Notice: A separate rule, ATCP 29.51(1), requires at least 24 hours advance notice to any beekeeper who has filed a written request that year, before applying a pesticide labeled "Highly Toxic to Bees" or containing methomyl. The beekeeper must keep a colony within 1.5 miles of the site to be eligible to request notice.