1.3 Certification Renewal, Continuing Education & Compliance

Key Takeaways

  • Missouri operator certificates are renewed at least every three years, and the department mails a renewal notice at least 60 days before expiration, but non-receipt does not excuse a late renewal.
  • Drinking water renewal training is set by level in 10 CSR 60-14 Table 4: 30 hours for A, B, C and DS-III; 20 hours for D and DS-II; 10 hours for DS-I. Wastewater requires 30 hours at every level.
  • No more than one-half of the required renewal hours may come from safety, supervisory, management, administration, financial or general computer courses.
  • A certificate not renewed within two months after expiration is lapsed, and a lapsed certificate requires a new application and re-examination rather than a late payment.
  • Late renewal costs $37.50 per month up to $75 for drinking water certificates and $10 per month up to $20 for wastewater certificates.
Last updated: September 2026

Operator certification in Missouri is not a lifetime credential; it is a professional license that requires continuous renewal and ongoing education. To protect public health and the environment, 10 CSR 60-14 and 10 CSR 20-9 mandate that operators stay current with advancing technology, emerging contaminants, process optimizations, and evolving state and federal environmental regulations.

The Three-Year Renewal Cycle

All Missouri drinking water treatment (Levels A–D), distribution (DS-I to DS-III) and wastewater treatment (Levels A–D) certificates are renewed at least every three (3) years, unless the department prorates a cycle to align multiple certificates.

  • The department sends a renewal notice to the operator's last known address at least sixty (60) days before expiration. Critically, failure of the department to send that notice does not relieve the operator of the responsibility for renewing.
  • An individual is not certified while holding an expired certificate. There is no informal "still working on it" status.
  • The operator must apply for renewal on the department's form, before the certificate lapses, and submit the associated fee for each certificate held.
  • Operators must notify the department in writing of any change of address, name, telephone number or employer; email and fax are acceptable written communication for this purpose.
  • Renewals, training histories and contact updates are handled through MoDNR's Operator Certification Information System at apps5.mo.gov/operator, which also hosts the public operator search.

Renewal Training Hours Are Not the Same for Every Certificate

This is the single most misquoted fact in Missouri operator certification. Drinking water renewal training requirements are set by certificate level in 10 CSR 60-14.020, Table 4 — they are not a flat 30 hours:

Certification levelMinimum training required per renewal cycle
A30 hours
B30 hours
C30 hours
D20 hours
DS-III30 hours
DS-II20 hours
DS-I10 hours

Wastewater is different again: under 10 CSR 20-9, the applicant must obtain thirty (30) hours of approved renewal training, without the level-by-level reduction the drinking water table applies.

So a DS-I operator needs 10 hours, a Drinking Water D or DS-II operator needs 20, and everyone else needs 30. An operator holding both a Wastewater C and a DS-I certificate must satisfy both requirements separately.

What counts, and the one-half rule

  • Only training related to water system operations and maintenance, treatment facilities or distribution systems, and approved by the department, receives credit. Training requirements are based on the level of certification held, and training should include an update on new regulation requirements.
  • Not more than one-half (1/2) of the total renewal training hours required in a renewal period may be credited from safety, supervisory, management, administration, financial and general computer courses. A DS-III operator needing 30 hours can therefore count at most 15 hours from that category.
  • Credit is based on actual contact time. Breaks and meal times must be shown on the agenda and are not counted.
  • For multi-day courses, 80% attendance of the course hours is required for credit.
  • Training providers must submit course details to the department for approval at least thirty (30) days before the training, and must submit the attendance roster afterwards; no credit is issued until the department issues a course identification number.

Acceptable subjects include regulations, operations, maintenance, construction, testing, record keeping and repair of pumps, control valves, altitude valves, fire hydrants, chlorinators, chemical feeders, elevated tanks, standpipes, reservoirs, pressure tanks, filters, backflow devices, meters, control systems and standby generators; process control of aeration, rapid mix, flocculation, sedimentation, filtration, disinfection, chemical oxidation, chemical precipitation, pH adjustment, stabilization, fluoridation, adsorption, ion exchange, reverse osmosis, sludge handling, sequestration and corrosion control; mathematics, chemistry, geology, hydrology, limnology, meteorology, microbiology, hydraulics, cartography and epidemiology; sampling and laboratory technique; safety practices including CPR, first aid, confined space entry, shoring and trenching, hazardous materials handling, electrical safety, traffic control, SCBA, chlorine repair kits and tower climbing; flushing programs, system disinfection, main repair, pressure testing, fire flow measurement, leak detection, tower inspection, draw-down testing and loss/leakage calculations; and computer classes intended for water utilities such as SCADA.

Unacceptable subjects are listed explicitly: introduction to English, history, welding, small motor repair, lawnmower safety and commercial driver's licence training.


Expiration, the Two-Month Window, and Lapse

Missouri's grace window is short and specific. Under 10 CSR 60-14.020(8)(F):

Any certificate not renewed within the two (2) months following the expiration date will be considered lapsed.

An operator with a lapsed certificate cannot simply pay a late fee — they must submit a new application and re-examine.

StageStatus
Before expiration, complete application filedCertificate renewed; if the department cannot issue the replacement in time through no fault of the operator, the current certificate stays valid until the department acts
Expiration date passesNot certified. Cannot legally serve as chief operator or make process control decisions
Within 2 months after expirationRenewable on payment of the renewal fee plus a late fee
More than 2 months after expirationLapsed — new application and re-examination required

Late fees: drinking water certificates are charged $37.50 per month up to a total of $75; wastewater certificates are charged $10 per month up to a total of $20.

Suspension adds a wrinkle: if a suspended certificate falls due for renewal during the suspension, the operator must still submit the renewal application and fee before the expiration date, and the department holds the renewed certificate until the suspension ends.


Compliance, Enforcement and Falsification

The department may suspend or revoke a certificate for fraud or deceit in obtaining certification, or for wilful violation of any provision of 10 CSR 60, with the severity of action based on the frequency and severity of the conduct. Grounds specifically named include misleading or lying to a government official, sample tampering or selective sampling, and falsification. Notice of suspension or revocation is delivered by hand or certified mail and must state the reasons; appeals go to the Administrative Hearing Commission under section 621.250, RSMo.

Falsifying chlorine residual data, laboratory bench sheets, Monthly Operating Reports or Discharge Monitoring Reports is not merely an administrative matter — knowing falsification of records required under the Safe Drinking Water Act or Clean Water Act carries federal criminal exposure in addition to state revocation and civil penalties.

Test Your Knowledge

A Missouri operator holds a Distribution System I (DS-I) certificate. Under Table 4 of 10 CSR 60-14.020, how many hours of department-approved training must be completed in the three-year renewal cycle?

A
B
C
D
Test Your Knowledge

A Missouri drinking water operator's certificate expired seven months ago and was never renewed. What is the operator's position under 10 CSR 60-14.020?

A
B
C
D
Test Your Knowledge

Which action can expose a certified operator and utility to license discipline, civil enforcement, and—when the required criminal elements are proved—personal criminal prosecution?

A
B
C
D