Ohio is one of the few states that actually names contract operators in rule, and it backs that up with a 3-day notice and a published approved-operator list.
Being a contract operator means carrying responsible charge for systems you don't own, on rules that change at every state line. This page holds what this state actually requires, cited to the current rule text and dated. If you're earlier in the journey, start with the guides below.
Ohio writes the contract-operator business model right into its rules. It defines two roles: a "contract operations company," a firm the director approves to employ or hire out certified operators, and a "contracted professional operator," the person who does the actual work, either for that company or on their own contract (OAC 3745-7-01). Both terms cover public water systems and wastewater treatment works, all under one chapter, OAC 3745-7.
The bar for the job: whoever the owner names as operator of record must hold a certificate class equal to or higher than the system's own classification (OAC 3745-7-02; OAC 3745-7-03, -04). Water systems are classed A/I/II/III/IV for treatment and I/II for distribution. Treatment works are classed A/I/II/III/IV, sewerage systems I/II. Ohio also recently added a narrower "Facility Specific" certificate (Water Supply and Water Reclamation Classes I-III). That one is backup-only. It cannot serve as the operator of record.
Source: OAC 3745-7-02, verified 2026-07-16.
Ohio calls the role "professional operator of record." The owner of a public water system, sewerage system, or treatment works must name one in writing to the state, not just on an internal document (OAC 3745-7-02). Someone who visits once a month to grab a sample is not filling this role. The operator of record must match the system's certificate class and meet the visit schedule covered below.
Ohio does recognize a backup operator by name, even without its own filing form: the holiday and offsite-meeting rules both require "the operator of record, or appropriately certified backup operator" to be able to respond to an emergency in person within one hour (OAC 3745-7-03). So a backup role exists and must be certified, it just isn't its own separate category on paper.
Source: OAC 3745-7-02, verified 2026-07-16.
Ohio's 2026-07 (effective 2026-11-07 rule package) rewrite added a restricted 'Facility Specific' certificate (Water Supply / Water Reclamation Classes I-III) that is backup-only and cannot itself serve as ORC, a narrower credential tier than most states' single-ladder system. Also notable: Ohio runs TWO separate visit-frequency regimes in parallel, a certified-operator minimum-days schedule (3-5 days/week by class) AND a separate 7-day/week 'owner, supplier, or representative/agent' visit requirement that does not require certification, layering a non-certified presence requirement on top of the certified ORC schedule.
When a system hires or lets go a contract operator, the owner has 3 days to tell Ohio EPA, on a form the director accepts, counted from the day service starts or ends (OAC 3745-7-02). Most related filings, changing who's designated, third-party certification, reciprocity, renewal, go through the Ohio EPA eBusiness Center, which needs an OHID login. We couldn't confirm the exact current form name or link for the DDAGW contract-operator filing; the page we checked returned an error. Confirm the live form with Ohio EPA's Operator Certification Unit (1-866-411-OPCT) before you file.
Source: OAC 3745-7-02, verified 2026-07-16.
Ohio sets no number limit on how many public water systems, sewerage systems, or treatment works one contract operator or one contract operations company can serve. We checked OAC 3745-7-02 and the rest of the chapter and found nothing.
Instead of a headcount cap, Ohio controls this through the visit-frequency schedule below, plus director approval of the company itself. A contract operations company must be approved by the director before it can take on any clients, which works more like a quality check than a limit on systems per operator.
Ohio runs two visit schedules side by side, which is unusual. The certified operator of record must physically visit a Class I distribution or sewerage system at least 3 days a week, and a Class II system at least 5 days a week (OAC 3745-7-03; OAC 3745-7-04). Treatment plants follow their own presence table based on classification. On top of that, every public water system also needs a general visit 7 days a week from the owner, supplier, or a representative, and that person doesn't have to be certified (OAC 3745-7-03). That's your backstop on days the certified operator isn't physically there.
Two narrow exceptions allow time off-site: a federal-holiday exception covering up to 20% of weekly minimum staffing, and an offsite-meeting exception for Class III/IV operators covering up to 10% of weekly staffing hours, logged in the logbook. Both require the operator of record or a certified backup to be able to respond in person to an emergency within one hour, and neither applies if the system is under formal enforcement.
Remote monitoring doesn't substitute for the visit schedule. Ohio's own certification rule excludes "off-site monitoring of SCADA" from counting as operating experience at all, while on-site SCADA monitoring counts, capped at 25% (OAC 3745-7-01). If you're planning remote-heavy coverage, Ohio's written rules don't support it as a stand-in for these in-person visit minimums.
Source: OAC 3745-7-03, verified 2026-07-16.
Ohio EPA publishes the "List of Director Approved Contract Operators and Contract Operation Companies," a PDF directory kept separate from the general certified-operator roster. The agency's own language calls it a convenience, not an endorsement. To get added, a company or individual contacts the Operator Certification Unit directly at 1-866-411-OPCT (6728) or 614-644-2752. Getting listed on this directory is a separate, lighter step from the director's approval of your company as a "contract operations company" under OAC 3745-7-01, which is the real regulatory approval you need before you can operate at all.
Source: List of Director Approved Contract Operators and Contract Operation Companies, verified 2026-07-17.
The real business-side requirement in Ohio is bigger than paperwork: your company must be approved by the director to operate as a contract operations company in the first place (OAC 3745-7-01). That's a substantive approval, not a simple registration filing. We didn't find a separate insurance or bonding rule for contract operators anywhere in OAC Chapter 3745-7. Standard Ohio Secretary of State business registration applies the way it does to any Ohio business, but that's general law, not a water-sector rule, so confirm separately with Ohio EPA what the director's approval actually requires.
Source: OAC 3745-7-01, verified 2026-07-16.
Most states don't make liability insurance a condition of holding a license. Carry it anyway. EPA's operator hiring guide puts it on the short list of questions every board should ask a contract operator: do you have liability insurance, and does it name the utility?
The reason is simple. You are making calls that affect public drinking water on systems you don't own. If something goes wrong, an uninsured operator puts the board's whole trust in you on the line, and boards that have been burned know to ask. Showing up to the first conversation with coverage in hand, and the certificate to prove it, closes the question before it opens. Talk to an insurance agent who handles utility contractors; policies that name each system you serve are the norm in this business.
Every system you operate on one map, with the records, work orders, and compliance schedule your crew actually uses. We run our own contract operation on it, so the demo is the real thing, not a sandbox.
Confirm current text with Ohio EPA's Operator Certification Unit (1-866-411-OPCT / 614-644-2752) before you commit to anything.
Rules change. Check the current text before you commit.
Ohio EPA: Division of Drinking & Ground Waters
Rules change at the state line. These neighbors have their own pages.