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University of Hawaii

Botanical And Zoological Gardens, Honolulu, Hawaii. NPDES permit HI0020630 expired Dec 19, 2018; its limits still apply. No reports in EPA's file for the last 12 months. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (32 values)
Last report on file
None in EPA's file for the last 12 months; that may be EPA's gap, not the facility's

Limits in force (32)

ParameterStatisticLimitMonths
Turbidityannual geometric mean≤ .2 NTUall year
Turbiditymaximum≤ .5 NTUall year
BOD, 5-day, 20 deg. Cquarterly average≤ 5 mg/Lall year
BOD, 5-day, 20 deg. Cdaily maximum≤ 7.5 mg/Lall year
BOD, 5-day, 20 deg. Cquarterly average≤ 26.7 lb/dall year
BOD, 5-day, 20 deg. Cdaily maximum≤ 40 lb/dall year
pHminimum≥ 7.6 SUall year
pHmaximum≤ 8.6 SUall year
Solids, total suspendedquarterly average≤ 60 mg/Lall year
Solids, total suspendeddaily maximum≤ 90 mg/Lall year
Solids, total suspendedquarterly average≤ 320 lb/dall year
Solids, total suspendeddaily maximum≤ 480 lb/dall year
Nitrogen, total [as N]annual geometric mean≤ 430 ug/Lall year
Nitrogen, total [as N]daily maximum≤ 653 ug/Lall year
Nitrogen, total [as N]annual geometric mean≤ 2.29 lb/dall year
Nitrogen, total [as N]daily maximum≤ 3.48 lb/dall year
Nitrite + Nitrate total [as N]annual geometric mean≤ 111 ug/Lall year
Nitrite + Nitrate total [as N]maximum≤ 288 ug/Lall year
Nitrite + Nitrate total [as N]annual geometric mean≤ .592 lb/dall year
Nitrite + Nitrate total [as N]maximum≤ 1.537 lb/dall year
Chlorophyll Aannual geometric mean≤ .15 ug/Lall year
Chlorophyll Amaximum≤ .5 ug/Lall year
Chlorophyll Aannual geometric mean≤ .0008 lb/dall year
Chlorophyll Amaximum≤ .0026 lb/dall year
Flow, in conduit or thru treatment plantmaximumreport only (MGD)all year
Chlorine, total residualdaily maximumreport only (ug/L)all year
Enterococcigeometric meanreport only (#/100mL)all year
Enterococcimaximumreport only (#/100mL)all year
Nitrogen, ammonia total [as NH4]annual geometric mean≤ 33.5 ug/Lall year
Nitrogen, ammonia total [as NH4]maximum≤ 137 ug/Lall year
Nitrogen, ammonia total [as NH4]annual geometric mean≤ .178 lb/dall year
Nitrogen, ammonia total [as NH4]maximum≤ .731 lb/dall year

How strict are these limits?

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

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Your permit document is the final word. As JSON: /api/v1/permits/HI0020630 · MCP: https://passage-data.com/mcp