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City of Sanborn

Sewage treatment plant, Sanborn, Iowa. NPDES permit IA0032522, in force until May 31, 2030. Last 12 months: over a limit 38 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (34 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
36 values over a limit, 20 required values missing, 1 of 12 reports late

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

All 38 values over a limit
Period endingParameterReportedLimitOver by
October 2025Nitrogen, ammonia total [as N], 30-day average18.89082≤ 12.8 lb/d48%
October 2025Nitrogen, ammonia total [as N], 30-day average2.2125≤ 1.6 mg/L38%
November 2025Nitrogen, ammonia total [as N], 30-day average21.35127≤ 19 lb/d12%
November 2025Nitrogen, ammonia total [as N], 30-day average3.01125≤ 2.3 mg/L31%
November 2025Nitrogen, ammonia total [as N], daily maximum4.81≤ 3.9 mg/L23%
December 2025Nitrogen, ammonia total [as N], 30-day average57.55848≤ 20.3 lb/d184%
December 2025Nitrogen, ammonia total [as N], 30-day average7.507≤ 2.5 mg/L200%
December 2025Nitrogen, ammonia total [as N], daily maximum73.11669≤ 31.8 lb/d130%
December 2025Nitrogen, ammonia total [as N], daily maximum9.19≤ 3.9 mg/L136%
February 2026Nitrogen, ammonia total [as N], 30-day average6.813333≤ 3.2 mg/L113%
February 2026Nitrogen, ammonia total [as N], 30-day average76.74623≤ 26.3 lb/d192%
February 2026Nitrogen, ammonia total [as N], daily maximum7.7≤ 3.2 mg/L141%
February 2026Nitrogen, ammonia total [as N], daily maximum86.95117≤ 26.3 lb/d231%
February 2026Solids, total suspended, 30-day average332.3639≤ 246 lb/d35%
February 2026Solids, total suspended, 7-day average370.4224≤ 369 lb/d0%
March 2026Nitrogen, ammonia total [as N], 30-day average3.776666≤ 3.4 mg/L11%
March 2026Nitrogen, ammonia total [as N], 30-day average37.79363≤ 27.9 lb/d35%
March 2026Nitrogen, ammonia total [as N], daily maximum6.79≤ 3.9 mg/L74%
March 2026Nitrogen, ammonia total [as N], daily maximum76.13148≤ 31.9 lb/d139%
March 2026Solids, total suspended, 30-day average294.3688≤ 246 lb/d20%
March 2026Solids, total suspended, 30-day average31.52272≤ 30 mg/L5%
April 2026Solids, total suspended, 30-day average396.287≤ 246 lb/d61%
April 2026Solids, total suspended, 30-day average44.28571≤ 30 mg/L48%
April 2026Solids, total suspended, 7-day average575.9846≤ 369 lb/d56%
April 2026Solids, total suspended, 7-day average64.8≤ 45 mg/L44%
May 2026Nitrogen, ammonia total [as N], 30-day average5.6425≤ 1.7 mg/L232%
May 2026Nitrogen, ammonia total [as N], 30-day average56.63438≤ 14.3 lb/d296%
May 2026Nitrogen, ammonia total [as N], daily maximum7.8≤ 3.2 mg/L144%
May 2026Nitrogen, ammonia total [as N], daily maximum80.13105≤ 26.4 lb/d204%
May 2026Oxygen, dissolved [DO], daily minimum4.8≥ 5 mg/L4%
June 2026Nitrogen, ammonia total [as N], 30-day average36.25292≤ 10.7 lb/d239%
June 2026Nitrogen, ammonia total [as N], 30-day average4.544≤ 1.3 mg/L250%
June 2026Nitrogen, ammonia total [as N], daily maximum63.19044≤ 21.7 lb/d191%
June 2026Nitrogen, ammonia total [as N], daily maximum7.06≤ 2.7 mg/L161%
July 2026Nitrogen, ammonia total [as N], 30-day average1.772222≤ 1 mg/L77%
July 2026Nitrogen, ammonia total [as N], 30-day average14.59389≤ 8.2 lb/d78%
July 2026Nitrogen, ammonia total [as N], daily maximum26.80486≤ 26.3 lb/d2%
August 2026Nitrogen, ammonia total [as N], 30-day average1.15125≤ 1 mg/L15%

Limits in force (78)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]daily minimum≥ 5 mg/Lall year
BOD, 5-day, 20 deg. C30-day averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year
BOD, 5-day, 20 deg. C30-day averagereport only (lb/d)all year
BOD, 5-day, 20 deg. Cdaily maximumreport only (lb/d)all year
pHdaily minimum≥ 6.5 SUall year
pHdaily maximum≤ 9 SUall year
pH30-day averagereport only (SU)all year
pHdaily maximumreport only (SU)all year
Solids, total suspended30-day average≤ 30 mg/Lall year
Solids, total suspended7-day average≤ 45 mg/Lall year
Solids, total suspended30-day average≤ 246 lb/dall year
Solids, total suspended7-day average≤ 369 lb/dall year
Solids, total suspended30-day averagereport only (mg/L)all year
Solids, total suspendeddaily maximumreport only (mg/L)all year
Solids, total suspended30-day averagereport only (lb/d)all year
Solids, total suspendeddaily maximumreport only (lb/d)all year
Nitrogen, ammonia total [as N]30-day average≤ 3.4 mg/LMar
Nitrogen, ammonia total [as N]30-day average≤ 1 mg/LJul
Nitrogen, ammonia total [as N]30-day average≤ 1.6 mg/LOct
Nitrogen, ammonia total [as N]30-day average≤ 1 mg/LAug
Nitrogen, ammonia total [as N]30-day average≤ 1.7 mg/LMay
Nitrogen, ammonia total [as N]30-day average≤ 2.5 mg/LDec
Nitrogen, ammonia total [as N]30-day average≤ 3.4 mg/LJan
Nitrogen, ammonia total [as N]30-day average≤ 1.1 mg/LSep
Nitrogen, ammonia total [as N]30-day average≤ 1.3 mg/LJun
Nitrogen, ammonia total [as N]30-day average≤ 1.5 mg/LApr
Nitrogen, ammonia total [as N]30-day average≤ 2.3 mg/LNov
Nitrogen, ammonia total [as N]30-day average≤ 3.2 mg/LFeb
Nitrogen, ammonia total [as N]daily maximum≤ 3.9 mg/LMar
Nitrogen, ammonia total [as N]daily maximum≤ 3.2 mg/LJul
Nitrogen, ammonia total [as N]daily maximum≤ 4.7 mg/LOct
Nitrogen, ammonia total [as N]daily maximum≤ 3.2 mg/LAug
Nitrogen, ammonia total [as N]daily maximum≤ 3.2 mg/LMay
Nitrogen, ammonia total [as N]daily maximum≤ 3.9 mg/LDec
Nitrogen, ammonia total [as N]daily maximum≤ 8.4 mg/LJan
Nitrogen, ammonia total [as N]daily maximum≤ 3.9 mg/LSep
Nitrogen, ammonia total [as N]daily maximum≤ 2.7 mg/LJun
Nitrogen, ammonia total [as N]daily maximum≤ 3.2 mg/LApr
Nitrogen, ammonia total [as N]daily maximum≤ 3.9 mg/LNov
Nitrogen, ammonia total [as N]daily maximum≤ 3.2 mg/LFeb
Nitrogen, ammonia total [as N]30-day average≤ 27.9 lb/dMar
Nitrogen, ammonia total [as N]30-day average≤ 8.2 lb/dJul
Nitrogen, ammonia total [as N]30-day average≤ 12.8 lb/dOct
Nitrogen, ammonia total [as N]30-day average≤ 7.8 lb/dAug
Nitrogen, ammonia total [as N]30-day average≤ 14.3 lb/dMay
Nitrogen, ammonia total [as N]30-day average≤ 20.3 lb/dDec
Nitrogen, ammonia total [as N]30-day average≤ 27.9 lb/dJan
Nitrogen, ammonia total [as N]30-day average≤ 8.7 lb/dSep
Nitrogen, ammonia total [as N]30-day average≤ 10.7 lb/dJun
Nitrogen, ammonia total [as N]30-day average≤ 12.5 lb/dApr
Nitrogen, ammonia total [as N]30-day average≤ 19 lb/dNov
Nitrogen, ammonia total [as N]30-day average≤ 26.3 lb/dFeb
Nitrogen, ammonia total [as N]daily maximum≤ 31.9 lb/dMar
Nitrogen, ammonia total [as N]daily maximum≤ 26.3 lb/dJul
Nitrogen, ammonia total [as N]daily maximum≤ 38.7 lb/dOct
Nitrogen, ammonia total [as N]daily maximum≤ 26.3 lb/dAug
Nitrogen, ammonia total [as N]daily maximum≤ 26.4 lb/dMay
Nitrogen, ammonia total [as N]daily maximum≤ 31.8 lb/dDec
Nitrogen, ammonia total [as N]daily maximum≤ 69.1 lb/dJan
Nitrogen, ammonia total [as N]daily maximum≤ 31.8 lb/dSep
Nitrogen, ammonia total [as N]daily maximum≤ 21.7 lb/dJun
Nitrogen, ammonia total [as N]daily maximum≤ 26.3 lb/dApr
Nitrogen, ammonia total [as N]daily maximum≤ 31.8 lb/dNov
Nitrogen, ammonia total [as N]daily maximum≤ 26.3 lb/dFeb
Nitrogen, Kjeldahl, total [as N]30-day averagereport only (mg/L)all year
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/L)all year
Nitrogen, Kjeldahl, total [as N]30-day averagereport only (lb/d)all year
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (lb/d)all year
Sulfate, total [as SO4]30-day average≤ 1864 mg/Lall year
Sulfate, total [as SO4]daily maximum≤ 1864 mg/Lall year
Sulfate, total [as SO4]30-day average≤ 15280 lb/dall year
Sulfate, total [as SO4]daily maximum≤ 15280 lb/dall year
E. coligeometric mean≤ 800 #/100mLMar–Nov
BOD, carbonaceous [5 day, 20 C]30-day average≤ 25 mg/Lall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 40 mg/Lall year
BOD, carbonaceous [5 day, 20 C]30-day average≤ 205 lb/dall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 328 lb/dall year

How strict are these limits?

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

Check this month's numbers Email me before each report is due

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Your permit document is the final word. As JSON: /api/v1/permits/IA0032522 · MCP: https://passage-data.com/mcp