City of Tuscaloosa — NPDES permit AL0022713: limits, due date and EPA's record

Sewage treatment plant, major discharger, Tuscaloosa, Alabama. NPDES permit AL0022713, in force until Feb 29, 2028. Last 12 months: over a limit 27 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Limits in force (152)

Period ending	Outfall	Parameter	Reported	Limit	Over by
October 2025	001	E. coli, daily maximum	707.8	≤ 298 #/100mL	138%
November 2025	001	Nitrogen, ammonia total [as N], weekly average	4.17	≤ 3 mg/L	39%
November 2025	001	Nitrogen, ammonia total [as N], weekly average	630.46	≤ 600 lb/d	5%
May 2026	001	E. coli, daily maximum	678.7	≤ 298 #/100mL	128%
May 2026	001	E. coli, monthly average	170.4	≤ 126 #/100mL	35%
May 2026	001	pH, daily minimum	5.5	≥ 6 SU	—
June 2026	001	BOD, carbonaceous [5 day, 20 C], monthly average	19.1	≤ 8 mg/L	139%
June 2026	001	BOD, carbonaceous [5 day, 20 C], monthly average	3217.5	≤ 1601 lb/d	101%
June 2026	001	BOD, carbonaceous [5 day, 20 C], weekly average	31.2	≤ 12 mg/L	160%
June 2026	001	BOD, carbonaceous [5 day, 20 C], weekly average	5253	≤ 2401 lb/d	119%
June 2026	001	E. coli, daily maximum	2466.5	≤ 298 #/100mL	728%
June 2026	001	E. coli, monthly average	308.9	≤ 126 #/100mL	145%
June 2026	002	Chlorine, total residual, daily maximum	.05	≤ .024 mg/L	108%
June 2026	002	Chlorine, total residual, monthly average	.04	≤ .014 mg/L	186%
June 2026	002	E. coli, daily maximum	2083.2	≤ 298 #/100mL	599%
June 2026	002	E. coli, monthly average	1304.4	≤ 126 #/100mL	935%
July 2026	001	BOD, carbonaceous [5 day, 20 C], monthly average	12285.7	≤ 1601 lb/d	667%
July 2026	001	BOD, carbonaceous [5 day, 20 C], monthly average	87.1	≤ 8 mg/L	989%
July 2026	001	BOD, carbonaceous [5 day, 20 C], weekly average	134.4	≤ 12 mg/L	1020%
July 2026	001	BOD, carbonaceous [5 day, 20 C], weekly average	18964.1	≤ 2401 lb/d	690%
July 2026	001	E. coli, daily maximum	663.2	≤ 298 #/100mL	123%
August 2026	001	BOD, carbonaceous [5 day, 20 C], monthly average	15.6	≤ 8 mg/L	95%
August 2026	001	BOD, carbonaceous [5 day, 20 C], monthly average	2448.9	≤ 1601 lb/d	53%
August 2026	001	BOD, carbonaceous [5 day, 20 C], weekly average	47.8	≤ 12 mg/L	298%
August 2026	001	BOD, carbonaceous [5 day, 20 C], weekly average	7513.3	≤ 2401 lb/d	213%
August 2026	001	E. coli, daily maximum	2504	≤ 298 #/100mL	740%
August 2026	001	E. coli, monthly average	130	≤ 126 #/100mL	3%

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	≤ 9 SU	all year	001
Solids, total suspended	monthly average	≤ 30 mg/L	all year	001
Solids, total suspended	weekly average	≤ 45 mg/L	all year	001
Solids, total suspended	monthly average	≤ 6004 lb/d	all year	001
Solids, total suspended	weekly average	≤ 9007 lb/d	all year	001
Solids, total suspended	monthly average	report only (mg/L)	all year	001
Solids, total suspended	weekly average	report only (mg/L)	all year	001
Solids, total suspended	monthly average	report only (lb/d)	all year	001
Solids, total suspended	weekly average	report only (lb/d)	all year	001
Nitrogen, ammonia total [as N]	monthly average	≤ 2 mg/L	May–Nov	001
Nitrogen, ammonia total [as N]	monthly average	≤ 15 mg/L	Jan, Feb, Mar, Apr, Dec	001
Nitrogen, ammonia total [as N]	weekly average	≤ 3 mg/L	May–Nov	001
Nitrogen, ammonia total [as N]	weekly average	≤ 22.5 mg/L	Jan, Feb, Mar, Apr, Dec	001
Nitrogen, ammonia total [as N]	monthly average	≤ 400 lb/d	May–Nov	001
Nitrogen, ammonia total [as N]	monthly average	≤ 3002 lb/d	Jan, Feb, Mar, Apr, Dec	001
Nitrogen, ammonia total [as N]	weekly average	≤ 600 lb/d	May–Nov	001
Nitrogen, ammonia total [as N]	weekly average	≤ 4503 lb/d	Jan, Feb, Mar, Apr, Dec	001
Nitrogen, Kjeldahl, total [as N]	monthly average	≤ 6 mg/L	May–Nov	001
Nitrogen, Kjeldahl, total [as N]	monthly average	≤ 30 mg/L	Jan, Feb, Mar, Apr, Dec	001
Nitrogen, Kjeldahl, total [as N]	weekly average	≤ 9 mg/L	May–Nov	001
Nitrogen, Kjeldahl, total [as N]	weekly average	≤ 45 mg/L	Jan, Feb, Mar, Apr, Dec	001
Nitrogen, Kjeldahl, total [as N]	monthly average	≤ 1200 lb/d	May–Nov	001
Nitrogen, Kjeldahl, total [as N]	monthly average	≤ 6004 lb/d	Jan, Feb, Mar, Apr, Dec	001
Nitrogen, Kjeldahl, total [as N]	weekly average	≤ 1801 lb/d	May–Nov	001
Nitrogen, Kjeldahl, total [as N]	weekly average	≤ 9007 lb/d	Jan, Feb, Mar, Apr, Dec	001
Nitrite + Nitrate total [as N]	monthly average	report only (mg/L)	all year	001
Nitrite + Nitrate total [as N]	weekly average	report only (mg/L)	all year	001
Nitrite + Nitrate total [as N]	monthly average	report only (lb/d)	all year	001
Nitrite + Nitrate total [as N]	weekly average	report only (lb/d)	all year	001
Phosphorus, total [as P]	monthly average	report only (mg/L)	all year	001
Phosphorus, total [as P]	weekly average	report only (mg/L)	all year	001
Phosphorus, total [as P]	monthly average	report only (lb/d)	all year	001
Phosphorus, total [as P]	weekly 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
Chlorine, total residual	monthly average	≤ .064 mg/L	all year	001
Chlorine, total residual	daily maximum	≤ .111 mg/L	all year	001
E. coli	monthly average	≤ 548 #/100mL	Jan, Feb, Mar, Apr, Nov, Dec	001
E. coli	monthly average	≤ 126 #/100mL	May–Oct	001
E. coli	daily maximum	≤ 2507 #/100mL	Jan, Feb, Mar, Apr, Nov, Dec	001
E. coli	daily maximum	≤ 298 #/100mL	May–Oct	001
Toxicity [chronic], Ceriodaphnia dubia	single sample	≤ 0 pass=0;fail=1	Oct	001
Toxicity [chronic], Pimephales promelas [Fathead Minnow]	single sample	≤ 0 pass=0;fail=1	Oct	001
BOD, carbonaceous [5 day, 20 C]	monthly average	≤ 20 mg/L	Jan, Feb, Mar, Apr, Dec	001
BOD, carbonaceous [5 day, 20 C]	monthly average	≤ 8 mg/L	May–Nov	001
BOD, carbonaceous [5 day, 20 C]	weekly average	≤ 30 mg/L	Jan, Feb, Mar, Apr, Dec	001
BOD, carbonaceous [5 day, 20 C]	weekly average	≤ 12 mg/L	May–Nov	001
BOD, carbonaceous [5 day, 20 C]	monthly average	≤ 4003 lb/d	Jan, Feb, Mar, Apr, Dec	001
BOD, carbonaceous [5 day, 20 C]	monthly average	≤ 1601 lb/d	May–Nov	001
BOD, carbonaceous [5 day, 20 C]	weekly average	≤ 6004 lb/d	Jan, Feb, Mar, Apr, Dec	001
BOD, carbonaceous [5 day, 20 C]	weekly average	≤ 2401 lb/d	May–Nov	001
BOD, carbonaceous [5 day, 20 C]	monthly average	report only (mg/L)	all year	001
BOD, carbonaceous [5 day, 20 C]	weekly average	report only (mg/L)	all year	001
BOD, carbonaceous [5 day, 20 C]	monthly average	report only (lb/d)	all year	001
BOD, carbonaceous [5 day, 20 C]	weekly average	report only (lb/d)	all year	001
BOD, carb-5 day, 20 deg C, percent removal	monthly average minimum	≥ 85 %	all year	001
Solids, suspended percent removal	monthly average minimum	≥ 85 %	all year	001
Flow rate	daily minimum	report only (cfs)	all year	002
Oxygen, dissolved [DO]	daily minimum	≥ 6 mg/L	all year	002
pH	daily minimum	≥ 6 SU	all year	002
pH	daily maximum	≤ 8.5 SU	all year	002
Solids, total suspended	monthly average	≤ 30 mg/L	all year	002
Solids, total suspended	weekly average	≤ 45 mg/L	all year	002
Solids, total suspended	monthly average	report only (lb/d)	all year	002
Solids, total suspended	weekly average	report only (lb/d)	all year	002
Solids, total suspended	monthly average	report only (mg/L)	all year	002
Solids, total suspended	weekly average	report only (mg/L)	all year	002
Solids, total suspended	monthly average	report only (lb/d)	all year	002
Solids, total suspended	weekly average	report only (lb/d)	all year	002
Nitrogen, ammonia total [as N]	monthly average	≤ 2 mg/L	May–Nov	002
Nitrogen, ammonia total [as N]	monthly average	≤ 7.5 mg/L	Jan, Feb, Mar, Apr, Dec	002
Nitrogen, ammonia total [as N]	weekly average	≤ 3 mg/L	May–Nov	002
Nitrogen, ammonia total [as N]	weekly average	≤ 11.2 mg/L	Jan, Feb, Mar, Apr, Dec	002
Nitrogen, ammonia total [as N]	monthly average	report only (lb/d)	May–Nov	002
Nitrogen, ammonia total [as N]	monthly average	report only (lb/d)	Jan, Feb, Mar, Apr, Dec	002
Nitrogen, ammonia total [as N]	weekly average	report only (lb/d)	May–Nov	002
Nitrogen, ammonia total [as N]	weekly average	report only (lb/d)	Jan, Feb, Mar, Apr, Dec	002
Nitrogen, Kjeldahl, total [as N]	monthly average	report only (mg/L)	all year	002
Nitrogen, Kjeldahl, total [as N]	weekly average	report only (mg/L)	all year	002
Nitrogen, Kjeldahl, total [as N]	monthly average	report only (lb/d)	all year	002
Nitrogen, Kjeldahl, total [as N]	weekly average	report only (lb/d)	all year	002
Nitrite + Nitrate total [as N]	monthly average	report only (mg/L)	all year	002
Nitrite + Nitrate total [as N]	weekly average	report only (mg/L)	all year	002
Nitrite + Nitrate total [as N]	monthly average	report only (lb/d)	all year	002
Nitrite + Nitrate total [as N]	weekly average	report only (lb/d)	all year	002
Phosphorus, total [as P]	monthly average	report only (mg/L)	all year	002
Phosphorus, total [as P]	weekly average	report only (mg/L)	all year	002
Phosphorus, total [as P]	monthly average	report only (lb/d)	all year	002
Phosphorus, total [as P]	weekly average	report only (lb/d)	all year	002
Zinc, total recoverable	monthly average	= 214 ug/L	all year	002
Zinc, total recoverable	daily maximum	= 214 ug/L	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
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
Chlorine, total residual	monthly average	≤ .014 mg/L	all year	002
Chlorine, total residual	daily maximum	≤ .024 mg/L	all year	002
E. coli	monthly average	≤ 126 #/100mL	May–Oct	002
E. coli	monthly average	≤ 548 #/100mL	Jan, Feb, Mar, Apr, Nov, Dec	002
E. coli	daily maximum	≤ 298 #/100mL	May–Oct	002
E. coli	daily maximum	≤ 2507 #/100mL	Jan, Feb, Mar, Apr, Nov, Dec	002
Toxicity [chronic], Ceriodaphnia dubia	single sample	≤ 0 pass=0;fail=1	Oct	002
Toxicity [chronic], Pimephales promelas [Fathead Minnow]	single sample	≤ 0 pass=0;fail=1	Oct	002
BOD, carbonaceous [5 day, 20 C]	monthly average	≤ 8 mg/L	May–Nov	002
BOD, carbonaceous [5 day, 20 C]	monthly average	≤ 20 mg/L	Jan, Feb, Mar, Apr, Dec	002
BOD, carbonaceous [5 day, 20 C]	weekly average	≤ 12 mg/L	May–Nov	002
BOD, carbonaceous [5 day, 20 C]	weekly average	≤ 30 mg/L	Jan, Feb, Mar, Apr, Dec	002
BOD, carbonaceous [5 day, 20 C]	monthly average	report only (lb/d)	May–Nov	002
BOD, carbonaceous [5 day, 20 C]	monthly average	report only (lb/d)	Jan, Feb, Mar, Apr, Dec	002
BOD, carbonaceous [5 day, 20 C]	weekly average	report only (lb/d)	May–Nov	002
BOD, carbonaceous [5 day, 20 C]	weekly average	report only (lb/d)	Jan, Feb, Mar, Apr, Dec	002
BOD, carbonaceous [5 day, 20 C]	monthly average	report only (mg/L)	all year	002
BOD, carbonaceous [5 day, 20 C]	weekly average	report only (mg/L)	all year	002
BOD, carbonaceous [5 day, 20 C]	monthly average	report only (lb/d)	all year	002
BOD, carbonaceous [5 day, 20 C]	weekly average	report only (lb/d)	all year	002
BOD, carb-5 day, 20 deg C, percent removal	monthly average minimum	≥ 85 %	all year	002
Solids, suspended percent removal	monthly average minimum	≥ 85 %	all year	002
pH	daily minimum	report only (SU)	all year	003
pH	daily maximum	report only (SU)	all year	003
Solids, total suspended	daily maximum	report only (mg/L)	all year	003
Oil & Grease	daily maximum	≤ 15 mg/L	all year	003
Nitrogen, ammonia total [as N]	daily maximum	report only (mg/L)	all year	003
Nitrogen, Kjeldahl, total [as N]	daily maximum	report only (mg/L)	all year	003
Nitrite + Nitrate total [as N]	daily maximum	report only (mg/L)	all year	003
Phosphorus, total [as P]	daily maximum	report only (mg/L)	all year	003
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	003
E. coli	daily maximum	report only (#/100mL)	all year	003
BOD, carbonaceous [5 day, 20 C]	daily maximum	report only (mg/L)	all year	003
pH	daily minimum	report only (SU)	all year	004
pH	daily maximum	report only (SU)	all year	004
Solids, total suspended	daily maximum	report only (mg/L)	all year	004
Oil & Grease	daily maximum	≤ 15 mg/L	all year	004
Nitrogen, ammonia total [as N]	daily maximum	report only (mg/L)	all year	004
Nitrogen, Kjeldahl, total [as N]	daily maximum	report only (mg/L)	all year	004
Nitrite + Nitrate total [as N]	daily maximum	report only (mg/L)	all year	004
Phosphorus, total [as P]	daily maximum	report only (mg/L)	all year	004
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	004
E. coli	daily maximum	report only (#/100mL)	all year	004
BOD, carbonaceous [5 day, 20 C]	daily maximum	report only (mg/L)	all year	004
pH	daily minimum	report only (SU)	all year	005
pH	daily maximum	report only (SU)	all year	005
Solids, total suspended	daily maximum	report only (mg/L)	all year	005
Oil & Grease	daily maximum	≤ 15 mg/L	all year	005
Nitrogen, ammonia total [as N]	daily maximum	report only (mg/L)	all year	005
Nitrogen, Kjeldahl, total [as N]	daily maximum	report only (mg/L)	all year	005
Nitrite + Nitrate total [as N]	daily maximum	report only (mg/L)	all year	005
Phosphorus, total [as P]	daily maximum	report only (mg/L)	all year	005
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	005
E. coli	daily maximum	report only (#/100mL)	all year	005
BOD, carbonaceous [5 day, 20 C]	daily maximum	report only (mg/L)	all year	005

How strict are these limits?

Your permit document is the final word. As JSON: /api/v1/permits/AL0022713 · MCP: https://passage-data.com/mcp