TNC Operator Certification Requirements
All transient non-community (TNC) water systems must have a certified operator of the appropriate class. Each system is classified based on type of treatment (Table 1). The certification requirements vary by class and are summarized in Table 2. (Operator Certification Application PDF Word ).
Table 1. TNC Water System Class Types |
Class |
Treatment Technology |
Class 1A |
No treatment; ion exchange for water softening; cartridge filters that were not required to be installed by the WSD; or limestone contactors. |
Class 1B |
Disinfection with chlorine or UV, including standby capability. |
Class 2 |
Not applicable for TNCs.
|
Class 3 |
Disinfection by means other than chlorine or UV; sequestering or filtration of manganese or iron; fluoridation; corrosion control; pH control; air stripping; granular activated adsorption; ion exchange (except for softening only, see class 1A); or aeration. |
Class 4A1 |
Systems using one of the following to treat surface water or ground water under the direct influence of surface water (GWUDI):
bag filtration; cartridge filtration; membrane filtration; slow sand filtration; or other similar technologies, as approved by the Secretary, which do not use coagulants. |
Class 4A, 4B, and 4C |
Systems using rapid sand filtration to treat surface water or ground water under the direct influence of surface water (GWUDI). Class depends on the population served by the system:
Class 4A – serving from 25 to 500 people;
Class 4B – serving from 501 to 3,300 people; and
Class 4C – serving more than 3,300 people. |
Table 2. TNC Water System Operator Certification Requirements |
Class |
Duration of Certificate and Fee |
Formal Education |
Operating Experience |
Certification Exam Required? |
Recertification Requirements |
Class 1A |
3 years
Fee $40 |
High School Diploma or GED* |
None |
No |
Re-register |
Class 1B |
3 years
Fee $40 |
High School Diploma or GED* |
None |
No |
3 hours of continuing education |
Class 2 |
Not Applicable to TNCs |
Class 3 |
3 years
Fee $70 |
High School Diploma or GED* |
1.5 years |
Yes |
20 hours of continuing education or retake exam |
Class 4A1 |
3 years
Fee $70 |
High School Diploma or GED* |
2 years |
Yes |
20 hours of continuing education or retake exam |
Class 4A |
3 years
Fee $70 |
High School Diploma or GED* |
2 years |
Yes |
20 hours of continuing education or retake exam |
Class 4B |
3 years
Fee $70 |
High School Diploma or GED* |
2.5 years |
Yes |
20 hours of continuing education or retake exam |
Class 4C |
3 years
Fee $70 |
High School Diploma or GED* |
3 years |
Yes |
20 hours of continuing education or retake exam |
*The WSD may allow experience and relevant training to be substituted for a high school diploma or GED.
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Water Supply Division