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Macbride Sanitary Sewer District

Sewage treatment plant, Solon, Iowa. NPDES permit IA0073580, in force until Apr 30, 2027. Last 12 months: over a limit 13 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (31 values)
Renewal application due
Nov 1, 2026 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
22 values over a limit, 0 required values missing, 1 of 12 reports late

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

All 13 values over a limit
Period endingParameterReportedLimitOver by
October 2025Nitrogen, ammonia total [as N], 30-day average13.6≤ 6.9 mg/L97%
October 2025Nitrogen, ammonia total [as N], daily maximum15≤ 6.9 mg/L117%
November 2025Nitrogen, ammonia total [as N], 30-day average13.25≤ 6.9 mg/L92%
November 2025Nitrogen, ammonia total [as N], daily maximum14≤ 6.9 mg/L103%
December 2025Chloride [as Cl], 30-day average392.5≤ 389 mg/L1%
December 2025Nitrogen, ammonia total [as N], 30-day average10.375≤ 10.1 mg/L3%
December 2025Nitrogen, ammonia total [as N], daily maximum11≤ 10.1 mg/L9%
March 2026Nitrogen, ammonia total [as N], 30-day average13.25≤ 10.1 mg/L31%
March 2026Nitrogen, ammonia total [as N], daily maximum17≤ 10.1 mg/L68%
July 2026Nitrogen, ammonia total [as N], 30-day average8.58≤ 8.3 mg/L3%
July 2026Nitrogen, ammonia total [as N], daily maximum10≤ 8.3 mg/L20%
August 2026Nitrogen, ammonia total [as N], 30-day average11.7≤ 6.9 mg/L70%
August 2026Nitrogen, ammonia total [as N], daily maximum13≤ 6.9 mg/L88%

Limits in force (75)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]daily minimum≥ 1 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 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≤ 80 mg/Lall year
Solids, total suspended7-day average≤ 120 mg/Lall year
Solids, total suspended30-day average≤ 34 lb/dall year
Solids, total suspended7-day average≤ 51 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≤ 10.1 mg/LMar
Nitrogen, ammonia total [as N]30-day average≤ 12.2 mg/LApr
Nitrogen, ammonia total [as N]30-day average≤ 6.9 mg/LAug
Nitrogen, ammonia total [as N]30-day average≤ 21.8 mg/LFeb
Nitrogen, ammonia total [as N]30-day average≤ 51.5 mg/LJan
Nitrogen, ammonia total [as N]30-day average≤ 6.9 mg/LNov
Nitrogen, ammonia total [as N]30-day average≤ 8.3 mg/LMay
Nitrogen, ammonia total [as N]30-day average≤ 6.9 mg/LSep
Nitrogen, ammonia total [as N]30-day average≤ 6.9 mg/LOct
Nitrogen, ammonia total [as N]30-day average≤ 8.3 mg/LJul
Nitrogen, ammonia total [as N]30-day average≤ 8.3 mg/LJun
Nitrogen, ammonia total [as N]30-day average≤ 10.1 mg/LDec
Nitrogen, ammonia total [as N]daily maximum≤ 10.1 mg/LMar
Nitrogen, ammonia total [as N]daily maximum≤ 12.2 mg/LApr
Nitrogen, ammonia total [as N]daily maximum≤ 6.9 mg/LAug
Nitrogen, ammonia total [as N]daily maximum≤ 21.8 mg/LFeb
Nitrogen, ammonia total [as N]daily maximum≤ 51.5 mg/LJan
Nitrogen, ammonia total [as N]daily maximum≤ 6.9 mg/LNov
Nitrogen, ammonia total [as N]daily maximum≤ 8.3 mg/LMay
Nitrogen, ammonia total [as N]daily maximum≤ 6.9 mg/LSep
Nitrogen, ammonia total [as N]daily maximum≤ 6.9 mg/LOct
Nitrogen, ammonia total [as N]daily maximum≤ 8.3 mg/LJul
Nitrogen, ammonia total [as N]daily maximum≤ 8.3 mg/LJun
Nitrogen, ammonia total [as N]daily maximum≤ 10.1 mg/LDec
Nitrogen, ammonia total [as N]30-day average≤ 4.3 lb/dMar
Nitrogen, ammonia total [as N]30-day average≤ 5.2 lb/dApr
Nitrogen, ammonia total [as N]30-day average≤ 2.9 lb/dAug
Nitrogen, ammonia total [as N]30-day average≤ 9.3 lb/dFeb
Nitrogen, ammonia total [as N]30-day average≤ 21.9 lb/dJan
Nitrogen, ammonia total [as N]30-day average≤ 2.9 lb/dNov
Nitrogen, ammonia total [as N]30-day average≤ 3.5 lb/dMay
Nitrogen, ammonia total [as N]30-day average≤ 2.9 lb/dSep
Nitrogen, ammonia total [as N]30-day average≤ 2.9 lb/dOct
Nitrogen, ammonia total [as N]30-day average≤ 3.5 lb/dJul
Nitrogen, ammonia total [as N]30-day average≤ 3.5 lb/dJun
Nitrogen, ammonia total [as N]30-day average≤ 4.3 lb/dDec
Nitrogen, ammonia total [as N]daily maximum≤ 4.3 lb/dMar
Nitrogen, ammonia total [as N]daily maximum≤ 5.2 lb/dApr
Nitrogen, ammonia total [as N]daily maximum≤ 2.9 lb/dAug
Nitrogen, ammonia total [as N]daily maximum≤ 9.3 lb/dFeb
Nitrogen, ammonia total [as N]daily maximum≤ 21.9 lb/dJan
Nitrogen, ammonia total [as N]daily maximum≤ 2.9 lb/dNov
Nitrogen, ammonia total [as N]daily maximum≤ 3.5 lb/dMay
Nitrogen, ammonia total [as N]daily maximum≤ 2.9 lb/dSep
Nitrogen, ammonia total [as N]daily maximum≤ 2.9 lb/dOct
Nitrogen, ammonia total [as N]daily maximum≤ 3.5 lb/dJul
Nitrogen, ammonia total [as N]daily maximum≤ 3.5 lb/dJun
Nitrogen, ammonia total [as N]daily maximum≤ 4.3 lb/dDec
Phosphorus, total [as P]30-day average≤ 1 lb/dall year
Phosphorus, total [as P]daily maximum≤ 1.63 lb/dall year
Chloride [as Cl]30-day average≤ 389 mg/Lall year
Chloride [as Cl]daily maximum≤ 629 mg/Lall year
Chloride [as Cl]30-day average≤ 165 lb/dall year
Chloride [as Cl]daily maximum≤ 267 lb/dall year
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≤ 11 lb/dall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 17 lb/dall year

How strict are these limits?

Cited limits by parameter: Iowa'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/IA0073580 · MCP: https://passage-data.com/mcp