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Town of Decaturville

Sewage treatment plant, Decaturville, Tennessee. NPDES permit TN0022985, in force until Nov 30, 2028. Last 12 months: over a limit 37 times (last September 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form G monthly (37 values), outfall INF1 form G monthly (6 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
5 values over a limit, 0 required values missing, 3 of 24 reports late

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

All 37 values over a limit
Period endingParameterReportedLimitOver by
October 2025Nitrogen, ammonia total [as N], daily maximum1 mg/L≤ .84 mg/L19%
November 2025Nitrogen, ammonia total [as N], daily maximum2.5 mg/L≤ 1.6 mg/L56%
November 2025Nitrogen, ammonia total [as N], monthly average1.1 mg/L≤ .81 mg/L36%
December 2025Nitrogen, ammonia total [as N], daily maximum10.7 mg/L≤ 1.6 mg/L569%
December 2025Nitrogen, ammonia total [as N], monthly average10.7 mg/L≤ .81 mg/L1221%
December 2025Nitrogen, ammonia total [as N], monthly average7.3 lb/d≤ 1.5 lb/d387%
December 2025Nitrogen, ammonia total [as N], weekly average10.7 mg/L≤ 1.2 mg/L792%
December 2025Nitrogen, ammonia total [as N], weekly average7.3 lb/d≤ 2.3 lb/d217%
December 2025Solids, suspended percent removal, daily minimum3 %≥ 40 %62%
December 2025Solids, suspended percent removal, monthly average minimum6 %≥ 85 %527%
January 2026Chlorine, total residual, monthly average1 mg/L≤ .011 mg/L8991%
January 2026Nitrogen, ammonia total [as N], daily maximum39 mg/L≤ 1.6 mg/L2338%
January 2026Nitrogen, ammonia total [as N], monthly average19.8 mg/L≤ .81 mg/L2344%
January 2026Nitrogen, ammonia total [as N], monthly average8.9 lb/d≤ 1.5 lb/d493%
January 2026Nitrogen, ammonia total [as N], weekly average19.8 mg/L≤ 1.2 mg/L1550%
January 2026Nitrogen, ammonia total [as N], weekly average8.9 lb/d≤ 2.3 lb/d287%
February 2026Nitrogen, ammonia total [as N], daily maximum11.5 mg/L≤ 1.6 mg/L619%
February 2026Nitrogen, ammonia total [as N], monthly average6.9 mg/L≤ .81 mg/L752%
February 2026Nitrogen, ammonia total [as N], monthly average9 lb/d≤ 1.5 lb/d500%
February 2026Nitrogen, ammonia total [as N], weekly average6.9 mg/L≤ 1.2 mg/L475%
February 2026Nitrogen, ammonia total [as N], weekly average9 lb/d≤ 2.3 lb/d291%
March 2026Nitrogen, ammonia total [as N], daily maximum12.2 mg/L≤ 1.6 mg/L663%
March 2026Nitrogen, ammonia total [as N], monthly average8.1 lb/d≤ 1.5 lb/d440%
March 2026Nitrogen, ammonia total [as N], monthly average8.4 mg/L≤ .81 mg/L937%
March 2026Nitrogen, ammonia total [as N], weekly average8.1 lb/d≤ 2.3 lb/d252%
March 2026Nitrogen, ammonia total [as N], weekly average8.4 mg/L≤ 1.2 mg/L600%
April 2026Chlorine, total residual, monthly average.02 mg/L≤ .011 mg/L82%
April 2026Nitrogen, ammonia total [as N], daily maximum12.5 mg/L≤ 1.6 mg/L681%
April 2026Nitrogen, ammonia total [as N], monthly average4 lb/d≤ 1.5 lb/d167%
April 2026Nitrogen, ammonia total [as N], monthly average4.6 mg/L≤ .81 mg/L468%
April 2026Nitrogen, ammonia total [as N], weekly average4 lb/d≤ 2.3 lb/d74%
April 2026Nitrogen, ammonia total [as N], weekly average4.6 mg/L≤ 1.2 mg/L283%
August 2026BOD, carbonaceous [5 day, 20 C], daily maximum36 mg/L≤ 20 mg/L80%
August 2026BOD, carbonaceous [5 day, 20 C], monthly average18.8 mg/L≤ 10 mg/L88%
August 2026BOD, carbonaceous [5 day, 20 C], weekly average18.8 mg/L≤ 15 mg/L25%
September 2026BOD, carbonaceous [5 day, 20 C], daily maximum23 mg/L≤ 20 mg/L15%
September 2026BOD, carbonaceous [5 day, 20 C], monthly average10.4 mg/L≤ 10 mg/L4%

Limits in force (53)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]instantaneous minimum≥ 6 mg/Lall year001
pHdaily minimum≥ 6 SUall year001
pHdaily maximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year001
Solids, total suspendedweekly average≤ 40 mg/Lall year001
Solids, total suspendeddaily maximum≤ 45 mg/Lall year001
Solids, total suspendedmonthly average≤ 58 lb/dall year001
Solids, total suspendedweekly average≤ 77 lb/dall year001
Solids, settleabledaily maximum≤ 1 mL/Lall year001
Nitrogen, total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, total [as N]monthly averagereport only (lb/d)all year001
Nitrogen, ammonia total [as N]monthly average≤ .81 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ .42 mg/LMay–Oct001
Nitrogen, ammonia total [as N]weekly average≤ 1.2 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]weekly average≤ .63 mg/LMay–Oct001
Nitrogen, ammonia total [as N]daily maximum≤ 1.6 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ .84 mg/LMay–Oct001
Nitrogen, ammonia total [as N]monthly average≤ 1.5 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ .8 lb/dMay–Oct001
Nitrogen, ammonia total [as N]weekly average≤ 2.3 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]weekly average≤ 1.2 lb/dMay–Oct001
Phosphorus, total [as P]monthly averagereport only (mg/L)all year001
Phosphorus, total [as P]monthly averagereport only (lb/d)all year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Chlorine, total residualmonthly average≤ .011 mg/Lall year001
Chlorine, total residualdaily maximum≤ .02 mg/Lall year001
E. colimonthly average≤ 126 #/100mLall year001
E. colidaily maximum≤ 941 #/100mLall year001
SSO, Dry Weathermonthly total≤ 0 occur/moall year001
SSO, Wet Weathermonthly total≤ 0 occur/moall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/LJan, Feb, Mar, Apr, Nov, Dec001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/LMay–Oct001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 35 mg/LJan, Feb, Mar, Apr, Nov, Dec001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 15 mg/LMay–Oct001
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 40 mg/LJan, Feb, Mar, Apr, Nov, Dec001
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 20 mg/LMay–Oct001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 48 lb/dJan, Feb, Mar, Apr, Nov, Dec001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 19 lb/dMay–Oct001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 67 lb/dJan, Feb, Mar, Apr, Nov, Dec001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 28 lb/dMay–Oct001
BOD, carbonaceous, percent removaldaily minimum≥ 40 %all year001
BOD, carbonaceous, percent removalmonthly average minimum≥ 85 %all year001
Solids, suspended percent removaldaily minimum≥ 40 %all year001
Solids, suspended percent removalmonthly average minimum≥ 85 %all year001
LC50 Static 48Hr Acute Ceriodaphnia dubiaminimumreport only (% survival)all year001
LC50 Static 48Hr Acute Pimephales promelasminimumreport only (% survival)all year001
Solids, total suspendedmonthly averagereport only (mg/L)all yearINF1
Solids, total suspendeddaily maximumreport only (mg/L)all yearINF1
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearINF1
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all yearINF1
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all yearINF1
BOD, carbonaceous [5 day, 20 C]daily maximumreport only (mg/L)all yearINF1

How strict are these limits?

Cited limits by parameter: Tennessee's rules and the federal ones.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/TN0022985 · MCP: https://passage-data.com/mcp