NODI Codes Explained

Code Z Available for Noncompliance Due to COVID-19

Effective retroactively from March 13, 2020, and until further notice, AZPDES individual permittees who are unable to complete required monitoring and reporting because of the COVID-19 pandemic can cite NODI Code Z when submitting their discharge monitoring report (DMR). Permittees should also enter the phrase “COVID-19” as a comment when submitting.

NODI Code Z must be used in myDEQ's noncompliance reporting feature.

What are NODI Codes?

A permittee may not always have a result to report on their discharge monitoring report (DMR). ADEQ’s permitting portal, myDEQ, does not allow partial submissions of DMRs. Either numeric results must be reported or a reason must be provided describing why no data exists—for either the entire DMR or certain parameters. NODI codes allow the permittee to easily provide a reason that is understood by ADEQ and EPA compliance databases.

Will I get a violation if I use a NODI code?

It depends. If a permittee has no discharge to report and has no required monitoring, reporting NODI C will not indicate a violation on the DMR. However, if a sample is lost, or not all required monitoring was completed, permittees may receive a notification of potential deficiency, alerting them of the missed monitoring.

How does ADEQ verify proper usage?

ADEQ uses the laboratory reports and any additional comments submitted via the myDEQ portal to verify that NODI codes are used appropriately. If ADEQ has questions, they may contact you and ask for more information.

Commonly Used NODI Codes

To ensure you are entering the proper NODI code, refer to the following list:

NODI Code What does it mean? When is it used? Examples
8 Other (see comments) No other applicable NODI code exists. Must describe in the comments. Use this code as a last resort if no other code exists.
9 Conditional monitoring  - not required this period Parameter must only be monitored in certain conditions. This can also be used for parameters with no approved laboratory method.

• Total residual chlorine was not required because UV was used for disinfection

• No approved laboratory method exists (Tribulin).

B Below detection limit/no detection When the result is less than the laboratory’s LOD/MDL Chlorine result is less than the method detection limit.
C No discharge (entire facility or entire monitoring point) No discharge occurred during the reporting period.
NOTE: You can enter NODI C only as part of the No Data reporting for the entire facility or an entire monitoring point. 
All discharge was sent to reuse.
D Lost sample/data not available No sample was available to submit to the laboratory. Sampling problems resulting in a lost sample.
E Analysis not conducted/no sample Laboratory did not complete all of the required analysis. Omission of a parameter from the laboratory analysis. Sample or laboratory analysis was not conducted.
M Laboratory error Problems at the laboratory resulted in no data to report. • Quality assurance failures.
• Exceeding holding times, etc.
Q Not quantifiable The result is greater than the LOD but less than the LOQ. Laboratory reports cyanide result above the MDL but below the RL and uses an E4 data laboratory data qualifier indicated the results is estimated.


Other NODI codes include:

1 — Wrong flow

3 — Special report attached

4 — Discharge to lagoon/groundwater

5 — Frozen conditions

7 — No influent

A — General permit exemption

F — Insufficient flow for sampling

G — Sampling equipment failure

H — Invalid test

I — Land applied

J — Recycled - water - closed system

K — Natural disaster

L — DMR received but not entered

R — Administratively resolved

S — Fire conditions

V — Weather related

W — Dry lysimeter/well

X — Parameter/value not reported

Z — COVID-19 related (applies retroactively beginning March 13, 2020, until further notice)

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