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The Island Water Association, Inc.

Water Supply, Sanibel Island Division, Florida. NPDES permit FL0025593, in force until Aug 2, 2027. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 90 days after each period: form 1 monthly (16 values), form Q quarterly (5 values)
Renewal application due
Feb 3, 2027 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 16 reports late

Limits in force (21)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]minimum weekly averagereport only (mg/L)all year
Oxygen, dissolved percent saturationminimum weekly averagereport only (%)all year
Oxygen, dissolved percent saturationmonthly averagereport only (%)all year
Oxygen, dissolved percent saturationquarterly total≤ 1 # exceedall year
Oxygen, dissolved percent saturationannual total≤ 1 # exceedall year
pHminimum≥ 6.5 SUall year
pHmaximum≤ 8.5 SUall year
Nitrogen, total [as N]maximumreport only (mg/L)all year
Phosphorus, total [as P]maximumreport only (mg/L)all year
Fluoride, total [as F]maximum≤ 8.6 mg/Lall year
Arsenic, total recoverablemaximum≤ 50 ug/Lall year
Radium 226 + radium 228, totalmaximum≤ 148.2 pCi/Lall year
Flow, in conduit or thru treatment plantdaily maximum≤ 1.33 MGDall year
Hydrogen sulfidemaximum≤ .01 mg/Lall year
Alpha, gross particle activitymaximum≤ 15 pCi/Lall year
LC50 Static Renewal 96Hr Acute Americamysis bahia (formerly Mysidopsis bahia)minimum≥ 30 %all year
LC50 Static Renewal 96Hr Acute Americamysis bahia (formerly Mysidopsis bahia)minimum≥ 30 %all year
LC50 Static Renewal 96Hr Acute Americamysis bahia (formerly Mysidopsis bahia)minimum≥ 30 %all year
LC50 Static Renewal 96Hr Acute Menidiaminimum≥ 30 %all year
LC50 Static Renewal 96Hr Acute Menidiaminimum≥ 30 %all year
LC50 Static Renewal 96Hr Acute Menidiaminimum≥ 30 %all year

How strict are these limits?

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

Same industry: the 26 Water Supply permits in Florida.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/FL0025593 · MCP: https://passage-data.com/mcp