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

Makah Tribal Council

Sewerage Systems, Neah Bay, Washington. NPDES permit WA0023213 expired Jun 30, 2021; its limits still apply. Last 12 months: over a limit 10 times (last March 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: form A monthly (24 values), form Q quarterly (4 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
4 values over a limit, 0 required values missing, 1 of 16 reports late

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

Period endingParameterReportedLimitOver by
October 2025pH, instantaneous minimum5.5 SU≥ 6 SU—
November 2025BOD, 5-day, percent removal, monthly average minimum80 %≥ 85 %33%
December 2025BOD, 5-day, percent removal, monthly average minimum66 %≥ 85 %127%
December 2025Fecal coliform, MPN, EC med, 44.5 C, monthly geometric mean331 CFU/100mL≤ 200 CFU/100mL66%
December 2025Solids, suspended percent removal, monthly average minimum84 %≥ 85 %7%
January 2026BOD, 5-day, percent removal, monthly average minimum83 %≥ 85 %13%
February 2026BOD, 5-day, percent removal, monthly average minimum80 %≥ 85 %33%
February 2026Chlorine, total residual, monthly average24 lb/d≤ 1.71 lb/d1304%
February 2026Chlorine, total residual, weekly average6 lb/d≤ 2.56 lb/d134%
March 2026BOD, 5-day, percent removal, monthly average minimum75 %≥ 85 %67%

Limits in force (28)

ParameterStatisticLimitMonths
Temperature, water deg. centigradedaily maximumreport only (deg C)all year
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 102.6 lb/dall year
BOD, 5-day, 20 deg. Cweekly average≤ 153.9 lb/dall year
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year
pHinstantaneous minimum≥ 6 SUall year
pHinstantaneous maximum≤ 9 SUall year
Alkalinity, total [as CaCO3]monthly averagereport only (mg/L)all year
Alkalinity, total [as CaCO3]daily maximumreport only (mg/L)all year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendedweekly average≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ 102.6 lb/dall year
Solids, total suspendedweekly average≤ 153.9 lb/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year
Fecal coliform, MPN, EC med, 44.5 Cmonthly geometric mean≤ 200 CFU/100mLall year
Fecal coliform, MPN, EC med, 44.5 Cweekly geometric mean≤ 400 CFU/100mLall year
Floating solids, waste or visible foam-visualmonthly maximum≤ 0 N=0;Y=1all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualmonthly average≤ .5 mg/Lall year
Chlorine, total residualweekly average≤ .75 mg/Lall year
Chlorine, total residualmonthly average≤ 1.71 lb/dall year
Chlorine, total residualweekly average≤ 2.56 lb/dall year
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year
Solids, suspended percent removalmonthly average minimum≥ 85 %all year

How strict are these limits?

Cited limits by parameter: Washington'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/WA0023213 · MCP: https://passage-data.com/mcp