No discharge is not a zero measurement.

A blank field can carry useful information. Replacing it with zero changes what the source actually says.

In the EPA BOD record for Cooper Farms Cooked Meats in Van Wert, Ohio, permit OH0132772, the January 2026 monthly-average entry at outfall 002 has no numeric value. Its source reason is “Below Detection Limit/No Detection.” February also has no numeric value, but its reason is “No Discharge.” These are different observations.

Keep the reason with the value

For an account review, preserve a no-data code as a reason, not a number. A chart should break across non-numeric observations. Otherwise a line falling to zero can suggest a reduction that the source never measured. Nor should an absent numeric value automatically become a missed-report alert: this record supplies a reporting reason.

The workspace carries the qualifier, no-data reason, monitoring period and receipt date into the evidence export. The displayed chart is a convenience; the source table is the place to inspect what was actually reported.

Dates answer different questions

The monitoring period tells you when the observation applies. Receipt tells you when the report reached the source system. Retrieval tells you when Effluent Watch read the public data. A newly retrieved record can describe a much older period. A source correction can also arrive later; that is why a change queue must retain both dates and the earlier version.

What an account reviewer can do

Record the question raised by the evidence, save a follow-up date and inspect the original EPA record before drawing a conclusion. This case does not establish a violation, treatment failure or need for new equipment. It demonstrates why an accurate watchlist must handle missing and qualified values carefully.

Inspect the official Cooper Farms source response. Case checked 6 October 2026; public records may later be revised. See the EPA effluent chart documentation for source context.