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Diamondhead Water and Sewer District

Sewage treatment plant, major discharger, Diamondhead, Mississippi. NPDES permit MS0046078, in force until Feb 29, 2028. Last 12 months: no values over a limit, 1 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (55 values)
Renewal application due
Sep 2, 2027 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 1 of 12 reports late

Limits in force (59)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]minimum≥ 6 mg/Lall year
Oxygen, dissolved [DO]minimumreport only (mg/L)all year
Oxygen, dissolved [DO]maximumreport only (mg/L)all year
BOD, 5-day, 20 deg. Cmonthly average≤ 25 mg/Lall year
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 37.5 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 522 lb/dall year
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 782 lb/dall year
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cmaximum weekly averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cmonthly averagereport only (lb/d)all year
BOD, 5-day, 20 deg. Cmaximum weekly averagereport only (lb/d)all year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendedmaximum weekly average≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ 626 lb/dall year
Solids, total suspendedmaximum weekly average≤ 939 lb/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspendedmaximum weekly averagereport only (mg/L)all year
Solids, total suspendedmonthly averagereport only (lb/d)all year
Solids, total suspendedmaximum weekly averagereport only (lb/d)all year
Nitrogen, total [as N]monthly averagereport only (mg/L)all year
Nitrogen, total [as N]maximum weekly averagereport only (mg/L)all year
Nitrogen, total [as N]monthly average≤ 239.78 lb/dall year
Nitrogen, total [as N]maximum weekly average≤ 359.67 lb/dall year
Nitrogen, total [as N]monthly averagereport only (mg/L)all year
Nitrogen, total [as N]maximum weekly averagereport only (mg/L)all year
Nitrogen, total [as N]monthly averagereport only (lb/d)all year
Nitrogen, total [as N]maximum weekly averagereport only (lb/d)all year
Nitrogen, ammonia total [as N]monthly average≤ 9 mg/Lall year
Nitrogen, ammonia total [as N]monthly average≤ 6 mg/Lall year
Nitrogen, ammonia total [as N]maximum weekly average≤ 13.5 mg/Lall year
Nitrogen, ammonia total [as N]maximum weekly average≤ 9 mg/Lall year
Nitrogen, ammonia total [as N]monthly average≤ 188 lb/dall year
Nitrogen, ammonia total [as N]monthly average≤ 125 lb/dall year
Nitrogen, ammonia total [as N]maximum weekly average≤ 282 lb/dall year
Nitrogen, ammonia total [as N]maximum weekly average≤ 187 lb/dall year
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]maximum weekly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d)all year
Nitrogen, ammonia total [as N]maximum weekly averagereport only (lb/d)all year
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]maximum weekly averagereport only (mg/L)all year
Phosphorus, total [as P]monthly average≤ 114.4 lb/dall year
Phosphorus, total [as P]maximum weekly average≤ 172.05 lb/dall year
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]maximum weekly averagereport only (mg/L)all year
Phosphorus, total [as P]monthly averagereport only (lb/d)all year
Phosphorus, total [as P]maximum weekly averagereport only (lb/d)all year
Flow, in conduit or thru treatment plantmonthly average≤ 2.5 MGDall year
Flow, in conduit or thru treatment plantmaximum weekly averagereport only (MGD)all year
Chlorine, total residualmonthly average≤ .053 mg/Lall year
Chlorine, total residualmaximum weekly average≤ .092 mg/Lall year
Enterococcimonthly average≤ 35 #/100mLall year
Enterococcimaximum weekly average≤ 70 #/100mLall year
BOD, 5-day, percent removalminimum≥ 85 %all year
Solids, suspended percent removalminimum≥ 85 %all year
Sludge settleability 30 minuteminimumreport only (mL/L)all year
Sludge settleability 30 minutemaximumreport only (mL/L)all year

New limits from Dec 4, 2026

ParameterNew limitNew or tighterMedian, last 12 months× new limit
Nitrogen, ammonia total [as N], maximum monthly average125 lb/dtighter——

How strict are these limits?

Cited limits by parameter: Mississippi'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/MS0046078 · MCP: https://passage-data.com/mcp