CYTEC Industries Inc. — NPDES permit TN0067415: limits, due date and EPA's record

Industrial Organic Chemicals, major discharger, Mount Pleasant, Tennessee. NPDES permit TN0067415, in force until Aug 31, 2028. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Limits in force (82)

Parameter	Statistic	Limit	Months	Outfall
pH	minimum	≥ 6 SU	all year	001
pH	maximum	≤ 9 SU	all year	001
Solids, total suspended	daily maximum	≤ 40 mg/L	all year	001
Nitrogen, total [as N]	daily maximum	report only (mg/L)	all year	001
Nitrogen, total [as N]	monthly average	report only (lb/d)	all year	001
Phosphorus, total [as P]	daily maximum	report only (mg/L)	all year	001
Phosphorus, total [as P]	monthly average	report only (lb/d)	all year	001
Flow, in conduit or thru treatment plant	monthly average	report only (MGD)	all year	001
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	001
IC25 Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia	minimum	≥ 10.2 %	all year	001
IC25 Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas	minimum	≥ 10.2 %	all year	001
pH	minimum	≥ 6 SU	all year	002
pH	maximum	≤ 9 SU	all year	002
Solids, total suspended	daily maximum	≤ 40 mg/L	all year	002
Nitrogen, total [as N]	daily maximum	report only (mg/L)	all year	002
Nitrogen, total [as N]	monthly average	report only (lb/d)	all year	002
Phosphorus, total [as P]	daily maximum	report only (mg/L)	all year	002
Phosphorus, total [as P]	monthly average	report only (lb/d)	all year	002
Flow, in conduit or thru treatment plant	monthly average	report only (MGD)	all year	002
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	002
IC25 Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia	minimum	≥ 2.4 %	all year	002
IC25 Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas	minimum	≥ 2.4 %	all year	002
BOD, 5-day, 20 deg. C	monthly average	≤ 30.53 lb/d	all year	003
BOD, 5-day, 20 deg. C	daily maximum	≤ 77.31 lb/d	all year	003
pH	minimum	≥ 6 SU	all year	003
pH	maximum	≤ 9 SU	all year	003
Solids, total suspended	daily maximum	report only (mg/L)	all year	003
Solids, total suspended	monthly average	≤ 37.73 lb/d	all year	003
Solids, total suspended	daily maximum	≤ 115.142 lb/d	all year	003
Nitrogen, total [as N]	daily maximum	report only (mg/L)	all year	003
Nitrogen, total [as N]	monthly average	report only (lb/d)	all year	003
Phosphorus, total [as P]	daily maximum	report only (mg/L)	all year	003
Phosphorus, total [as P]	monthly average	report only (lb/d)	all year	003
Cyanide, total [as CN]	monthly average	≤ .08 mg/L	all year	003
Cyanide, total [as CN]	daily maximum	≤ .584 mg/L	all year	003
Cyanide, total [as CN]	monthly average	≤ .048 lb/d	all year	003
Cyanide, total [as CN]	daily maximum	≤ .351 lb/d	all year	003
Chromium, total [as Cr]	monthly average	≤ 1.173 mg/L	all year	003
Chromium, total [as Cr]	daily maximum	≤ 2.807 mg/L	all year	003
Chromium, total [as Cr]	monthly average	≤ .704 lb/d	all year	003
Chromium, total [as Cr]	daily maximum	≤ 2.014 lb/d	all year	003
Copper, total [as Cu]	monthly average	≤ .814 mg/L	all year	003
Copper, total [as Cu]	daily maximum	≤ 1.303 mg/L	all year	003
Copper, total [as Cu]	monthly average	≤ .489 lb/d	all year	003
Copper, total [as Cu]	daily maximum	≤ .782 lb/d	all year	003
Lead, total [as Pb]	monthly average	≤ .249 mg/L	all year	003
Lead, total [as Pb]	daily maximum	≤ .594 mg/L	all year	003
Lead, total [as Pb]	monthly average	≤ .15 lb/d	all year	003
Lead, total [as Pb]	daily maximum	≤ .426 lb/d	all year	003
Thallium, total [as Tl]	monthly average	≤ .068 lb/d	all year	003
Thallium, total [as Tl]	daily maximum	≤ .148 lb/d	all year	003
Nickel, total [as Ni]	monthly average	report only (mg/L)	all year	003
Nickel, total [as Ni]	daily maximum	report only (mg/L)	all year	003
Nickel, total [as Ni]	monthly average	≤ 1.19 lb/d	all year	003
Nickel, total [as Ni]	daily maximum	≤ 2.74 lb/d	all year	003
Zinc, total [as Zn]	monthly average	report only (mg/L)	all year	003
Zinc, total [as Zn]	daily maximum	report only (mg/L)	all year	003
Zinc, total [as Zn]	monthly average	≤ .618 lb/d	all year	003
Zinc, total [as Zn]	daily maximum	≤ 1.801 lb/d	all year	003
Selenium, total [as Se]	monthly average	≤ .077 mg/L	all year	003
Selenium, total [as Se]	daily maximum	≤ .527 mg/L	all year	003
Selenium, total [as Se]	monthly average	≤ .046 lb/d	all year	003
Selenium, total [as Se]	daily maximum	≤ .316 lb/d	all year	003
Toluene	daily maximum	report only (mg/L)	all year	003
Toluene	monthly average	≤ .016 lb/d	all year	003
Toluene	daily maximum	≤ .048 lb/d	all year	003
Nitrobenzene	monthly average	≤ .016 lb/d	all year	003
Nitrobenzene	daily maximum	≤ .041 lb/d	all year	003
1,2,4-Trichlorobenzene	daily maximum	≤ .084 mg/L	all year	003
1,2,4-Trichlorobenzene	monthly average	≤ .041 lb/d	all year	003
Phenol	daily maximum	report only (mg/L)	all year	003
Phenol	monthly average	≤ .009 lb/d	all year	003
Phenol	daily maximum	≤ .016 lb/d	all year	003
Trichloroethylene	monthly average	≤ .013 lb/d	all year	003
Trichloroethylene	daily maximum	≤ .032 lb/d	all year	003
Trichloroethylene	daily maximum	report only (mg/L)	all year	003
Flow, in conduit or thru treatment plant	monthly average	report only (MGD)	all year	003
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	003
IC25 Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia	minimum	> 2.1 %	all year	003
IC25 Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas	minimum	> 2.1 %	all year	003
Nitrogen, total [as N]	rolling average	≤ 41612 lb/yr	all year	004A
Phosphorus, total [as P]	rolling average	≤ 2060 lb/yr	all year	004A

How strict are these limits?

Your permit document is the final word. As JSON: /api/v1/permits/TN0067415 · MCP: https://passage-data.com/mcp