NAVAJO ENGINE AND CONSTRUCTION AUTHORITY (NECA)

NPDES permit NN0030345 · Minor NON-POTW · effective, expires 2031-08-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file
Watch this permit — $79 a month. Every Monday, from EPA's newest files: the next report due and when, whether EPA's file holds your last one, any change to this permit's limits or status, and the renewal date.

EPA's record, 2025-09-01 to 2026-08-31

0values over a limit
18required values missing, on 2 form(s)
0of 2 forms filed late

Last period with anything received: none.

Reporting

Reports are due about 28 days after each monitoring period ends (the most common figure among NN permits in EPA's filings — check your permit).

Limits in force (60)

OutfallParameterStatisticLimitMonths
001Flow rate, instantaneousDAILY MX <= 3525 gal/min all year
001Flow rate, instantaneousDAILY MX <= 3525 gal/min all year
001TurbidityDAILY MX <= 50 NTU all year
001TurbidityDAILY MX <= 50 NTU all year
001pHMINIMUM >= 6.5 SU all year
001pHMINIMUM >= 6.5 SU all year
001pHMAXIMUM <= 9 SU all year
001pHMAXIMUM <= 9 SU all year
001Solids, total suspendedMO AVG <= 10 mg/L all year
001Solids, total suspendedMO AVG <= 10 mg/L all year
001Solids, total suspendedDAILY MX <= 30 mg/L all year
001Solids, total suspendedDAILY MX <= 30 mg/L all year
001Solids, total suspendedMO AVG <= 2.61 kg/d all year
001Solids, total suspendedMO AVG <= 2.61 kg/d all year
001Solids, total suspendedWKLY AVG <= 3.91 kg/d all year
001Solids, total suspendedWKLY AVG <= 3.91 kg/d all year
001Nitrogen, total [as N]DAILY MX report only all year
001Nitrogen, total [as N]DAILY MX report only all year
001Phosphorus, total [as P]DAILY MX report only all year
001Phosphorus, total [as P]DAILY MX report only all year
001Oil and greaseMO AVG <= 5 mg/L all year
001Oil and greaseMO AVG <= 5 mg/L all year
001Oil and greaseDAILY MX <= 10 mg/L all year
001Oil and greaseDAILY MX <= 10 mg/L all year
001Floating solids, waste or visible foam-visualVALUE report only all year
001Floating solids, waste or visible foam-visualVALUE report only all year
001Chlorine, total residualDAILY MX <= 11 ug/L all year
001Chlorine, total residualDAILY MX <= 11 ug/L all year
001Duration of dischargeMAXIMUM <= 14 d all year
001Duration of dischargeMAXIMUM <= 14 d all year
002Flow rate, instantaneousDAILY MX <= 500 gal/min all year
002Flow rate, instantaneousDAILY MX <= 500 gal/min all year
002TurbidityDAILY MX <= 50 NTU all year
002TurbidityDAILY MX <= 50 NTU all year
002pHMINIMUM >= 6.5 SU all year
002pHMINIMUM >= 6.5 SU all year
002pHMAXIMUM <= 9 SU all year
002pHMAXIMUM <= 9 SU all year
002Solids, total suspendedMO AVG <= 10 mg/L all year
002Solids, total suspendedMO AVG <= 10 mg/L all year
002Solids, total suspendedDAILY MX <= 30 mg/L all year
002Solids, total suspendedDAILY MX <= 30 mg/L all year
002Solids, total suspendedMO AVG <= 2.61 kg/d all year
002Solids, total suspendedMO AVG <= 2.61 kg/d all year
002Solids, total suspendedWKLY AVG <= 3.91 kg/d all year
002Solids, total suspendedWKLY AVG <= 3.91 kg/d all year
002Nitrogen, total [as N]DAILY MX report only all year
002Nitrogen, total [as N]DAILY MX report only all year
002Phosphorus, total [as P]DAILY MX report only all year
002Phosphorus, total [as P]DAILY MX report only all year
002Oil and greaseMO AVG <= 5 mg/L all year
002Oil and greaseMO AVG <= 5 mg/L all year
002Oil and greaseDAILY MX <= 10 mg/L all year
002Oil and greaseDAILY MX <= 10 mg/L all year
002Floating solids, waste or visible foam-visualVALUE report only all year
002Floating solids, waste or visible foam-visualVALUE report only all year
002Chlorine, total residualDAILY MX <= 11 ug/L all year
002Chlorine, total residualDAILY MX <= 11 ug/L all year
002Duration of dischargeMAXIMUM <= 14 d all year
002Duration of dischargeMAXIMUM <= 14 d all year

Built from EPA's ECHO bulk files. EPA's file, not the permit document, is the source: read your permit. Check a report before you file it · All states