Passage Data · Check a report · Use it from your AI

City of Steamboat Rock

Sewage treatment plant, Steamboat Rock, Iowa. NPDES permit IA0033324, in force until Oct 31, 2030. Last 12 months: over a limit 85 times (last August 2026), 6 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (25 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
47 values over a limit, 14 required values missing, 2 of 12 reports late

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

All 85 values over a limit
Period endingParameterReportedLimitOver by
October 2025E. coli, geometric mean7399.91≤ 126 #/100mL5773%
October 2025Solids, total suspended, 7-day average58≤ 45 mg/L29%
November 2025Nitrogen, ammonia total [as N], 30-day average18.13≤ 2.3 mg/L688%
November 2025Nitrogen, ammonia total [as N], 30-day average2.167107≤ .9 lb/d141%
November 2025Nitrogen, ammonia total [as N], daily maximum48.2≤ 14.7 mg/L228%
November 2025Solids, total suspended, 7-day average48≤ 45 mg/L7%
December 2025BOD, carbonaceous [5 day, 20 C], 30-day average279.4≤ 25 mg/L1018%
December 2025BOD, carbonaceous [5 day, 20 C], 30-day average31.13322≤ 10 lb/d211%
December 2025BOD, carbonaceous [5 day, 20 C], 7-day average723≤ 40 mg/L1708%
December 2025BOD, carbonaceous [5 day, 20 C], 7-day average78.38766≤ 16 lb/d390%
December 2025Nitrogen, ammonia total [as N], 30-day average12.1764≤ 1 lb/d1118%
December 2025Nitrogen, ammonia total [as N], 30-day average95.48≤ 2.5 mg/L3719%
December 2025Nitrogen, ammonia total [as N], daily maximum135≤ 16 mg/L744%
December 2025Nitrogen, ammonia total [as N], daily maximum18.8484≤ 6.5 lb/d190%
December 2025Solids, total suspended, 30-day average114.4≤ 30 mg/L281%
December 2025Solids, total suspended, 30-day average15.52908≤ 12 lb/d29%
December 2025Solids, total suspended, 7-day average228≤ 45 mg/L407%
December 2025Solids, total suspended, 7-day average38.0304≤ 18 lb/d111%
January 2026BOD, carbonaceous [5 day, 20 C], 30-day average88.5≤ 25 mg/L254%
January 2026BOD, carbonaceous [5 day, 20 C], 7-day average70≤ 40 mg/L75%
January 2026Nitrogen, ammonia total [as N], 30-day average63.275≤ 3.4 mg/L1761%
January 2026Nitrogen, ammonia total [as N], 30-day average8.133585≤ 1.4 lb/d481%
January 2026Nitrogen, ammonia total [as N], daily maximum14.74512≤ 6.2 lb/d138%
January 2026Nitrogen, ammonia total [as N], daily maximum79.3≤ 15.2 mg/L422%
January 2026Solids, total suspended, 30-day average51.25≤ 30 mg/L71%
January 2026Solids, total suspended, 7-day average83≤ 45 mg/L84%
February 2026BOD, carbonaceous [5 day, 20 C], 30-day average204.75≤ 25 mg/L719%
February 2026BOD, carbonaceous [5 day, 20 C], 30-day average27.07581≤ 10 lb/d171%
February 2026BOD, carbonaceous [5 day, 20 C], 7-day average425≤ 40 mg/L963%
February 2026BOD, carbonaceous [5 day, 20 C], 7-day average49.623≤ 16 lb/d210%
February 2026Nitrogen, ammonia total [as N], 30-day average11.2911≤ 1.6 lb/d606%
February 2026Nitrogen, ammonia total [as N], 30-day average76.35≤ 4 mg/L1809%
February 2026Nitrogen, ammonia total [as N], daily maximum102≤ 14.2 mg/L618%
February 2026Nitrogen, ammonia total [as N], daily maximum13.61088≤ 5.8 lb/d135%
February 2026Solids, total suspended, 30-day average436≤ 30 mg/L1353%
February 2026Solids, total suspended, 30-day average55.31088≤ 12 lb/d361%
February 2026Solids, total suspended, 7-day average1340≤ 45 mg/L2878%
February 2026Solids, total suspended, 7-day average156.4584≤ 18 lb/d769%
March 2026BOD, carbonaceous [5 day, 20 C], 30-day average35.25≤ 25 mg/L41%
March 2026BOD, carbonaceous [5 day, 20 C], 7-day average58≤ 40 mg/L45%
March 2026Nitrogen, ammonia total [as N], 30-day average55.7≤ 2.1 mg/L2552%
March 2026Nitrogen, ammonia total [as N], 30-day average9.407937≤ .9 lb/d945%
March 2026Nitrogen, ammonia total [as N], daily maximum10.89537≤ 6 lb/d82%
March 2026Nitrogen, ammonia total [as N], daily maximum76.6≤ 14.7 mg/L421%
April 2026BOD, carbonaceous [5 day, 20 C], 30-day average224.8≤ 25 mg/L799%
April 2026BOD, carbonaceous [5 day, 20 C], 30-day average78.406≤ 10 lb/d684%
April 2026BOD, carbonaceous [5 day, 20 C], 7-day average169.5021≤ 16 lb/d959%
April 2026BOD, carbonaceous [5 day, 20 C], 7-day average464≤ 40 mg/L1060%
April 2026E. coli, geometric mean119644≤ 126 #/100mL94856%
April 2026Nitrogen, ammonia total [as N], 30-day average16.55673≤ .6 lb/d2659%
April 2026Nitrogen, ammonia total [as N], 30-day average52.76≤ 1.5 mg/L3417%
April 2026Nitrogen, ammonia total [as N], daily maximum25.7806≤ 6.4 lb/d303%
April 2026Nitrogen, ammonia total [as N], daily maximum67.6≤ 15.7 mg/L331%
April 2026Solids, total suspended, 30-day average32.01392≤ 12 lb/d167%
April 2026Solids, total suspended, 30-day average94≤ 30 mg/L213%
April 2026Solids, total suspended, 7-day average166≤ 45 mg/L269%
April 2026Solids, total suspended, 7-day average61.68264≤ 18 lb/d243%
May 2026BOD, carbonaceous [5 day, 20 C], 30-day average23.19979≤ 10 lb/d132%
May 2026BOD, carbonaceous [5 day, 20 C], 30-day average74.25≤ 25 mg/L197%
May 2026BOD, carbonaceous [5 day, 20 C], 7-day average125≤ 40 mg/L213%
May 2026BOD, carbonaceous [5 day, 20 C], 7-day average42.73416≤ 16 lb/d167%
May 2026Nitrogen, ammonia total [as N], 30-day average16.54885≤ .7 lb/d2264%
May 2026Nitrogen, ammonia total [as N], 30-day average53.225≤ 1.7 mg/L3031%
May 2026Nitrogen, ammonia total [as N], daily maximum21.43713≤ 6.2 lb/d246%
May 2026Nitrogen, ammonia total [as N], daily maximum71.4≤ 15.2 mg/L370%
May 2026Solids, total suspended, 30-day average30.61822≤ 12 lb/d155%
May 2026Solids, total suspended, 30-day average96.75≤ 30 mg/L223%
May 2026Solids, total suspended, 7-day average158≤ 45 mg/L251%
May 2026Solids, total suspended, 7-day average49.73976≤ 18 lb/d176%
June 2026Nitrogen, ammonia total [as N], 30-day average1.740758≤ .5 lb/d248%
June 2026Nitrogen, ammonia total [as N], 30-day average9.39≤ 1.3 mg/L622%
June 2026Nitrogen, ammonia total [as N], daily maximum42.4≤ 14.4 mg/L194%
June 2026Nitrogen, ammonia total [as N], daily maximum7.779552≤ 5.9 lb/d32%
June 2026Solids, total suspended, 30-day average169.4≤ 30 mg/L465%
June 2026Solids, total suspended, 30-day average37.36653≤ 12 lb/d211%
June 2026Solids, total suspended, 7-day average116.343≤ 18 lb/d546%
June 2026Solids, total suspended, 7-day average310≤ 45 mg/L589%
July 2026E. coli, geometric mean10789.63≤ 126 #/100mL8463%
July 2026Solids, total suspended, 7-day average51≤ 45 mg/L13%
August 2026BOD, carbonaceous [5 day, 20 C], 7-day average66≤ 40 mg/L65%
August 2026Nitrogen, ammonia total [as N], 30-day average3.204019≤ .4 lb/d701%
August 2026Nitrogen, ammonia total [as N], 30-day average47.92≤ 1 mg/L4692%
August 2026Nitrogen, ammonia total [as N], daily maximum118≤ 16.2 mg/L628%
August 2026Nitrogen, ammonia total [as N], daily maximum7.87296≤ 6.6 lb/d19%
August 2026Solids, total suspended, 7-day average56≤ 45 mg/L24%

Limits in force (69)

ParameterStatisticLimitMonths
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≤ 30 mg/Lall year
Solids, total suspended7-day average≤ 45 mg/Lall year
Solids, total suspended30-day average≤ 12 lb/dall year
Solids, total suspended7-day average≤ 18 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/LJan
Nitrogen, ammonia total [as N]30-day average≤ 2.5 mg/LDec
Nitrogen, ammonia total [as N]30-day average≤ 1 mg/LJul
Nitrogen, ammonia total [as N]30-day average≤ 1 mg/LAug
Nitrogen, ammonia total [as N]30-day average≤ 2.1 mg/LMar
Nitrogen, ammonia total [as N]30-day average≤ 1.7 mg/LMay
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≤ 1.3 mg/LJun
Nitrogen, ammonia total [as N]30-day average≤ 4 mg/LFeb
Nitrogen, ammonia total [as N]30-day average≤ 1.1 mg/LSep
Nitrogen, ammonia total [as N]30-day average≤ 1.6 mg/LOct
Nitrogen, ammonia total [as N]daily maximum≤ 15.2 mg/LJan
Nitrogen, ammonia total [as N]daily maximum≤ 16 mg/LDec
Nitrogen, ammonia total [as N]daily maximum≤ 17.6 mg/LJul
Nitrogen, ammonia total [as N]daily maximum≤ 16.2 mg/LAug
Nitrogen, ammonia total [as N]daily maximum≤ 14.7 mg/LMar
Nitrogen, ammonia total [as N]daily maximum≤ 15.2 mg/LMay
Nitrogen, ammonia total [as N]daily maximum≤ 15.7 mg/LApr
Nitrogen, ammonia total [as N]daily maximum≤ 14.7 mg/LNov
Nitrogen, ammonia total [as N]daily maximum≤ 14.4 mg/LJun
Nitrogen, ammonia total [as N]daily maximum≤ 14.2 mg/LFeb
Nitrogen, ammonia total [as N]daily maximum≤ 16.5 mg/LSep
Nitrogen, ammonia total [as N]daily maximum≤ 15.7 mg/LOct
Nitrogen, ammonia total [as N]30-day average≤ 1.4 lb/dJan
Nitrogen, ammonia total [as N]30-day average≤ 1 lb/dDec
Nitrogen, ammonia total [as N]30-day average≤ .4 lb/dJul
Nitrogen, ammonia total [as N]30-day average≤ .4 lb/dAug
Nitrogen, ammonia total [as N]30-day average≤ .9 lb/dMar
Nitrogen, ammonia total [as N]30-day average≤ .7 lb/dMay
Nitrogen, ammonia total [as N]30-day average≤ .6 lb/dApr
Nitrogen, ammonia total [as N]30-day average≤ .9 lb/dNov
Nitrogen, ammonia total [as N]30-day average≤ .5 lb/dJun
Nitrogen, ammonia total [as N]30-day average≤ 1.6 lb/dFeb
Nitrogen, ammonia total [as N]30-day average≤ .4 lb/dSep
Nitrogen, ammonia total [as N]30-day average≤ .6 lb/dOct
Nitrogen, ammonia total [as N]daily maximum≤ 6.2 lb/dJan
Nitrogen, ammonia total [as N]daily maximum≤ 6.5 lb/dDec
Nitrogen, ammonia total [as N]daily maximum≤ 7.2 lb/dJul
Nitrogen, ammonia total [as N]daily maximum≤ 6.6 lb/dAug
Nitrogen, ammonia total [as N]daily maximum≤ 6 lb/dMar
Nitrogen, ammonia total [as N]daily maximum≤ 6.2 lb/dMay
Nitrogen, ammonia total [as N]daily maximum≤ 6.4 lb/dApr
Nitrogen, ammonia total [as N]daily maximum≤ 6 lb/dNov
Nitrogen, ammonia total [as N]daily maximum≤ 5.9 lb/dJun
Nitrogen, ammonia total [as N]daily maximum≤ 5.8 lb/dFeb
Nitrogen, ammonia total [as N]daily maximum≤ 6.7 lb/dSep
Nitrogen, ammonia total [as N]daily maximum≤ 6.4 lb/dOct
E. coligeometric mean≤ 126 #/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≤ 10 lb/dall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 16 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

· Save this facility as a site · Superfund sites nearby · Your permits on one board

On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/IA0033324 · MCP: https://passage-data.com/mcp