Guyoungtech USA, Inc. — NPDES permit AL0083135: limits, due date and EPA's record

Automotive Stampings, Castleberry, Alabama. NPDES permit AL0083135, in force until Dec 31, 2026. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Limits in force (70)

Parameter	Statistic	Limit	Months	Outfall
Oxygen, dissolved [DO]	daily minimum	≥ 6 mg/L	all year	001
pH	daily minimum	≥ 6 SU	all year	001
pH	daily maximum	≤ 8.5 SU	all year	001
Solids, total suspended	monthly average	≤ 31 mg/L	all year	001
Solids, total suspended	daily maximum	≤ 60 mg/L	all year	001
Oil & Grease	monthly average	≤ 26 mg/L	all year	001
Oil & Grease	daily maximum	≤ 52 mg/L	all year	001
Nitrogen, ammonia total [as N]	monthly average	≤ 15 mg/L	all year	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 22.5 mg/L	all year	001
Nickel, total recoverable	monthly average	≤ .916 mg/L	all year	001
Nickel, total recoverable	daily maximum	≤ 3.98 mg/L	all year	001
Silver total recoverable	monthly average	report only (mg/L)	all year	001
Silver total recoverable	daily maximum	≤ .0156 mg/L	all year	001
Zinc, total [as Zn]	monthly average	≤ 1.48 mg/L	all year	001
Zinc, total [as Zn]	daily maximum	≤ 2.61 mg/L	all year	001
Cadmium, total recoverable	monthly average	≤ .0103 mg/L	all year	001
Cadmium, total recoverable	daily maximum	≤ .0696 mg/L	all year	001
Lead, total recoverable	monthly average	≤ .0912 mg/L	all year	001
Lead, total recoverable	daily maximum	≤ .69 mg/L	all year	001
Chromium, total recoverable	monthly average	≤ 1.71 mg/L	all year	001
Chromium, total recoverable	daily maximum	≤ 2.77 mg/L	all year	001
Copper, total recoverable	monthly average	≤ .204 mg/L	all year	001
Copper, total recoverable	daily maximum	≤ .288 mg/L	all year	001
Cyanide [A]	monthly average	≤ .083 mg/L	all year	001
Cyanide [A]	daily maximum	≤ .352 mg/L	all year	001
Flow, in conduit or thru treatment plant	monthly average	≤ .0144 MGD	all year	001
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	001
Total Toxic Organics [TTO] Non-Use Certification	daily maximum	≤ 0 Y=0;N=1	all year	001
Toxicity [chronic], Ceriodaphnia dubia	single sample	≤ 0 pass=0;fail=1	all year	001
Toxicity [chronic], Pimephales promelas [Fathead Minnow]	single sample	≤ 0 pass=0;fail=1	all year	001
Mercury, total recoverable	daily maximum	report only (ug/L)	all year	001
Organics, total toxic [TTO]	daily maximum	≤ 2.13 mg/L	all year	001
BOD, carbonaceous [5 day, 20 C]	monthly average	≤ 90 mg/L	all year	001
BOD, carbonaceous [5 day, 20 C]	daily maximum	≤ 135 mg/L	all year	001
Flow, in conduit or thru treatment plant	daily minimum	≥ 150 gal/min	all year	002
Oxygen, dissolved [DO]	daily minimum	≥ 6 mg/L	all year	004
pH	daily minimum	≥ 6 SU	all year	004
pH	daily maximum	≤ 8.5 SU	all year	004
Solids, total suspended	monthly average	≤ 30 mg/L	all year	004
Solids, total suspended	daily maximum	≤ 45 mg/L	all year	004
Solids, total suspended	monthly average	≤ 2.2 lb/d	all year	004
Solids, total suspended	daily maximum	≤ 3.3 lb/d	all year	004
Nitrogen, ammonia total [as N]	monthly average	≤ 6 mg/L	all year	004
Nitrogen, ammonia total [as N]	daily maximum	≤ 9 mg/L	all year	004
Nitrogen, ammonia total [as N]	monthly average	≤ .45 lb/d	all year	004
Nitrogen, ammonia total [as N]	daily maximum	≤ .68 lb/d	all year	004
Nitrogen, Kjeldahl, total [as N]	monthly average	report only (mg/L)	all year	004
Nitrogen, Kjeldahl, total [as N]	daily maximum	report only (mg/L)	all year	004
Nitrogen, Kjeldahl, total [as N]	monthly average	report only (lb/d)	all year	004
Nitrogen, Kjeldahl, total [as N]	daily maximum	report only (lb/d)	all year	004
Nitrite + Nitrate total [as N]	monthly average	report only (mg/L)	all year	004
Nitrite + Nitrate total [as N]	daily maximum	report only (mg/L)	all year	004
Nitrite + Nitrate total [as N]	monthly average	report only (lb/d)	all year	004
Nitrite + Nitrate total [as N]	daily maximum	report only (lb/d)	all year	004
Phosphorus, total [as P]	monthly average	report only (mg/L)	all year	004
Phosphorus, total [as P]	daily maximum	report only (mg/L)	all year	004
Phosphorus, total [as P]	monthly average	report only (lb/d)	all year	004
Phosphorus, total [as P]	daily maximum	report only (lb/d)	all year	004
Flow, in conduit or thru treatment plant	monthly average	report only (MGD)	all year	004
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	004
Chlorine, total residual	monthly average	≤ .011 mg/L	all year	004
Chlorine, total residual	daily maximum	≤ .019 mg/L	all year	004
E. coli	monthly average	≤ 548 #/100mL	Jan, Feb, Mar, Apr, Nov, Dec	004
E. coli	monthly average	≤ 126 #/100mL	May–Oct	004
E. coli	daily maximum	≤ 2507 #/100mL	Jan, Feb, Mar, Apr, Nov, Dec	004
E. coli	daily maximum	≤ 298 #/100mL	May–Oct	004
BOD, carbonaceous [5 day, 20 C]	monthly average	≤ 15 mg/L	all year	004
BOD, carbonaceous [5 day, 20 C]	daily maximum	≤ 22.5 mg/L	all year	004
BOD, carbonaceous [5 day, 20 C]	monthly average	≤ 1.13 lb/d	all year	004
BOD, carbonaceous [5 day, 20 C]	weekly average	≤ 1.69 lb/d	all year	004

How strict are these limits?

Your permit document is the final word. As JSON: /api/v1/permits/AL0083135 · MCP: https://passage-data.com/mcp