Hermitage, City of — NPDES permit AR0051055: limits, due date and EPA's record

Hermitage, City of

Sewage treatment plant, Hermitage, Arkansas. NPDES permit AR0051055, in force until Jan 31, 2031. Last 12 months: over a limit 21 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due

About 25 days after each period: form A monthly (18 values)

Last report on file

August 2026

Oct 2024 – Sep 2025

6 values over a limit, 0 required values missing, 3 of 12 reports late

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

All 21 values over a limit

Period ending	Parameter	Reported	Limit	Over by
October 2025	BOD, carbonaceous [5 day, 20 C], monthly average	24.2 mg/L	≤ 20 mg/L	21%
October 2025	Oxygen, dissolved [DO], instantaneous minimum	1.81 mg/L	≥ 2 mg/L	10%
October 2025	Solids, total suspended, 7-day average	47.2 mg/L	≤ 30 mg/L	57%
October 2025	Solids, total suspended, monthly average	12.59 lb/d	≤ 11.7 lb/d	8%
October 2025	Solids, total suspended, monthly average	47.2 mg/L	≤ 20 mg/L	136%
May 2026	Nitrogen, ammonia total [as N], monthly average	6.2 mg/L	≤ 5.2 mg/L	19%
May 2026	Oxygen, dissolved [DO], instantaneous minimum	1.02 mg/L	≥ 2 mg/L	49%
June 2026	Nitrogen, ammonia total [as N], monthly average	5.4 mg/L	≤ 5.2 mg/L	4%
June 2026	Oxygen, dissolved [DO], instantaneous minimum	1.76 mg/L	≥ 2 mg/L	12%
June 2026	Solids, total suspended, monthly average	30 mg/L	≤ 20 mg/L	50%
July 2026	Nitrogen, ammonia total [as N], 7-day average	8.2 mg/L	≤ 7.8 mg/L	5%
July 2026	Nitrogen, ammonia total [as N], monthly average	8.2 mg/L	≤ 5.2 mg/L	58%
July 2026	Solids, total suspended, monthly average	25 mg/L	≤ 20 mg/L	25%
August 2026	Coliform, fecal general, 30-day geometric mean	1500 #/100mL	≤ 1000 #/100mL	50%
August 2026	Nitrogen, ammonia total [as N], 7-day average	12 mg/L	≤ 7.8 mg/L	54%
August 2026	Nitrogen, ammonia total [as N], monthly average	12 mg/L	≤ 5.2 mg/L	131%
August 2026	Nitrogen, ammonia total [as N], monthly average	5.05 lb/d	≤ 3 lb/d	68%
August 2026	Oxygen, dissolved [DO], instantaneous minimum	1.2 mg/L	≥ 2 mg/L	40%
August 2026	Solids, total suspended, 7-day average	45 mg/L	≤ 30 mg/L	50%
August 2026	Solids, total suspended, monthly average	18.9 lb/d	≤ 11.7 lb/d	62%
August 2026	Solids, total suspended, monthly average	45 mg/L	≤ 20 mg/L	125%

Limits in force (24)

Parameter	Statistic	Limit	Months
Oxygen, dissolved [DO]	instantaneous minimum	≥ 2 mg/L	all year
pH	minimum	≥ 6 SU	all year
pH	maximum	≤ 9 SU	all year
Solids, total suspended	monthly average	≤ 20 mg/L	all year
Solids, total suspended	7-day average	≤ 30 mg/L	all year
Solids, total suspended	monthly average	≤ 11.7 lb/d	all year
Nitrogen, ammonia total [as N]	monthly average	≤ 5.2 mg/L	May–Oct
Nitrogen, ammonia total [as N]	monthly average	≤ 14.7 mg/L	Jan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]	monthly average	≤ 6.1 mg/L	Apr
Nitrogen, ammonia total [as N]	7-day average	≤ 7.8 mg/L	May–Oct
Nitrogen, ammonia total [as N]	7-day average	≤ 17 mg/L	Jan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]	7-day average	≤ 6.1 mg/L	Apr
Nitrogen, ammonia total [as N]	monthly average	≤ 3.6 lb/d	Apr
Nitrogen, ammonia total [as N]	monthly average	≤ 3 lb/d	May–Oct
Nitrogen, ammonia total [as N]	monthly average	≤ 8.6 lb/d	Jan, Feb, Mar, Nov, Dec
Flow, in conduit or thru treatment plant	monthly average	report only (MGD)	all year
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year
Coliform, fecal general	30-day geometric mean	≤ 1000 #/100mL	all year
Coliform, fecal general	7-day geometric mean	≤ 2000 #/100mL	all year
Overflows	monthly total	report only (occur/mo)	all year
Overflow volume [SS0 volume, CSO volume]	monthly total	report only (gal)	all year
BOD, carbonaceous [5 day, 20 C]	monthly average	≤ 20 mg/L	all year
BOD, carbonaceous [5 day, 20 C]	7-day average	≤ 30 mg/L	all year
BOD, carbonaceous [5 day, 20 C]	monthly average	≤ 11.7 lb/d	all year

How strict are these limits?

Solids, total suspended, 7-day average 30 mg/L — stricter than 35% of 304 other minor POTWs in Arkansas; 23% have the same limit

Solids, total suspended, monthly average 20 mg/L — stricter than 34% of 307 other minor POTWs in Arkansas; 23% have the same limit

Nitrogen, ammonia total [as N], monthly average 5.2 mg/L — stricter than 14% of 223 other minor POTWs in Arkansas; 6% have the same limit

Your permit document is the final word. As JSON: /api/v1/permits/AR0051055 · MCP: https://passage-data.com/mcp