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Roberts, City of

Sewage treatment plant, Roberts, Idaho. NPDES permit ID0026913 expired Apr 30, 2009; its limits still apply. Last 12 months: over a limit 5 times (last September 2026), 3 of 24 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (18 values), form B monthly (4 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
22 values over a limit, 0 required values missing, 0 of 24 reports late

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

Period endingParameterReportedLimitOver by
April 2026Solids, suspended percent removal, minimum % removal75 %≥ 85 %67%
April 2026Solids, total suspended, monthly average39 mg/L≤ 30 mg/L30%
May 2026Solids, suspended percent removal, minimum % removal75 %≥ 85 %67%
September 2026BOD, 5-day, 20 deg. C, monthly average32 mg/L≤ 30 mg/L7%
September 2026BOD, 5-day, percent removal, minimum % removal84.2 %≥ 85 %5%

Limits in force (22)

ParameterStatisticLimitMonths
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 25 lb/dall year
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year
BOD, 5-day, 20 deg. Cweekly average≤ 38 lb/dall year
pHinstantaneous minimum≥ 6.5 SUall year
pHinstantaneous maximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendedmonthly average≤ 25 lb/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspendedweekly average≤ 45 mg/Lall year
Solids, total suspendedweekly average≤ 38 lb/dall year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantEPA's "DPD MAX"report only (MGD)all year
Chlorine, total residualmonthly average≤ .1 mg/Lall year
Chlorine, total residualdaily maximum≤ .1 mg/Lall year
Chlorine, total residualmonthly average≤ .08 lb/dall year
Chlorine, total residualdaily maximum≤ .08 lb/dall year
E. colimonthly geometric mean≤ 126 #/100mLall year
E. coliinstantaneous maximum≤ 406 #/100mLall year
BOD, 5-day, percent removalminimum % removal≥ 85 %all year
Solids, suspended percent removalminimum % removal≥ 85 %all year

How strict are these limits?

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

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

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/ID0026913 · MCP: https://passage-data.com/mcp