Navajo Engine and Construction Authority (Neca) — NPDES permit NN0030345: limits, due date and EPA's record

Water, Sewer, And Utility Lines, Shiprock, NN. NPDES permit NN0030345, in force until Aug 31, 2031. Last 12 months: no values over a limit, 18 required values missing. Source: EPA ECHO, Oct 22, 2026.

Limits in force (60)

Parameter	Statistic	Limit	Months	Outfall
Flow rate, instantaneous	daily maximum	≤ 3525 gal/min	all year	001
Flow rate, instantaneous	daily maximum	≤ 3525 gal/min	all year	001
Turbidity	daily maximum	≤ 50 NTU	all year	001
Turbidity	daily maximum	≤ 50 NTU	all year	001
pH	minimum	≥ 6.5 SU	all year	001
pH	minimum	≥ 6.5 SU	all year	001
pH	maximum	≤ 9 SU	all year	001
pH	maximum	≤ 9 SU	all year	001
Solids, total suspended	monthly average	≤ 10 mg/L	all year	001
Solids, total suspended	monthly average	≤ 10 mg/L	all year	001
Solids, total suspended	daily maximum	≤ 30 mg/L	all year	001
Solids, total suspended	daily maximum	≤ 30 mg/L	all year	001
Solids, total suspended	monthly average	≤ 2.61 kg/d	all year	001
Solids, total suspended	monthly average	≤ 2.61 kg/d	all year	001
Solids, total suspended	weekly average	≤ 3.91 kg/d	all year	001
Solids, total suspended	weekly average	≤ 3.91 kg/d	all year	001
Nitrogen, total [as N]	daily maximum	report only (mg/L)	all year	001
Nitrogen, total [as N]	daily maximum	report only (mg/L)	all year	001
Phosphorus, total [as P]	daily maximum	report only (mg/L)	all year	001
Phosphorus, total [as P]	daily maximum	report only (mg/L)	all year	001
Oil and grease	monthly average	≤ 5 mg/L	all year	001
Oil and grease	monthly average	≤ 5 mg/L	all year	001
Oil and grease	daily maximum	≤ 10 mg/L	all year	001
Oil and grease	daily maximum	≤ 10 mg/L	all year	001
Floating solids, waste or visible foam-visual	value	report only (abst=0;prst=1)	all year	001
Floating solids, waste or visible foam-visual	value	report only (abst=0;prst=1)	all year	001
Chlorine, total residual	daily maximum	≤ 11 ug/L	all year	001
Chlorine, total residual	daily maximum	≤ 11 ug/L	all year	001
Duration of discharge	maximum	≤ 14 d	all year	001
Duration of discharge	maximum	≤ 14 d	all year	001
Flow rate, instantaneous	daily maximum	≤ 500 gal/min	all year	002
Flow rate, instantaneous	daily maximum	≤ 500 gal/min	all year	002
Turbidity	daily maximum	≤ 50 NTU	all year	002
Turbidity	daily maximum	≤ 50 NTU	all year	002
pH	minimum	≥ 6.5 SU	all year	002
pH	minimum	≥ 6.5 SU	all year	002
pH	maximum	≤ 9 SU	all year	002
pH	maximum	≤ 9 SU	all year	002
Solids, total suspended	monthly average	≤ 10 mg/L	all year	002
Solids, total suspended	monthly average	≤ 10 mg/L	all year	002
Solids, total suspended	daily maximum	≤ 30 mg/L	all year	002
Solids, total suspended	daily maximum	≤ 30 mg/L	all year	002
Solids, total suspended	monthly average	≤ 2.61 kg/d	all year	002
Solids, total suspended	monthly average	≤ 2.61 kg/d	all year	002
Solids, total suspended	weekly average	≤ 3.91 kg/d	all year	002
Solids, total suspended	weekly average	≤ 3.91 kg/d	all year	002
Nitrogen, total [as N]	daily maximum	report only (mg/L)	all year	002
Nitrogen, total [as N]	daily maximum	report only (mg/L)	all year	002
Phosphorus, total [as P]	daily maximum	report only (mg/L)	all year	002
Phosphorus, total [as P]	daily maximum	report only (mg/L)	all year	002
Oil and grease	monthly average	≤ 5 mg/L	all year	002
Oil and grease	monthly average	≤ 5 mg/L	all year	002
Oil and grease	daily maximum	≤ 10 mg/L	all year	002
Oil and grease	daily maximum	≤ 10 mg/L	all year	002
Floating solids, waste or visible foam-visual	value	report only (abst=0;prst=1)	all year	002
Floating solids, waste or visible foam-visual	value	report only (abst=0;prst=1)	all year	002
Chlorine, total residual	daily maximum	≤ 11 ug/L	all year	002
Chlorine, total residual	daily maximum	≤ 11 ug/L	all year	002
Duration of discharge	maximum	≤ 14 d	all year	002
Duration of discharge	maximum	≤ 14 d	all year	002

How strict are these limits?

Your permit document is the final word. As JSON: /api/v1/permits/NN0030345 · MCP: https://passage-data.com/mcp