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

Grand Strand Water and Sewer Authority

Sewage treatment plant, major discharger, Longs, South Carolina. NPDES permit SC0041696, in force until Nov 30, 2027. Last 12 months: over a limit once (last May 2026), 30 required values missing, 8 of 54 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 29 days after each period: outfall 001 form 1 monthly (33 values), outfall 004 form A monthly (6 values), outfall 004 form B quarterly (4 values), outfall 006 form A monthly (6 values), outfall 006 form B quarterly (4 values), outfall 007 form A monthly (6 values), and 2 more forms
Renewal application due
Jun 3, 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, 0 of 61 reports late

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

Period endingParameterReportedLimitOver by
May 2026E. coli, daily maximum1553≤ 349 MPN/100mL345%

Limits in force (72)

ParameterStatisticLimitMonthsOutfall
Oxygen demand, ultimatemonthly average≤ 796 lb/dall year001
Oxygen demand, ultimateweekly averagereport only (lb/d)all year001
Oxygen, dissolved [DO]minimum≥ 6 mg/Lall year001
pHminimum≥ 6 SUall year001
pHmaximum≤ 8.5 SUall year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year001
Solids, total suspendedweekly average≤ 45 mg/Lall year001
Solids, total suspendedmonthly average≤ 1751 lb/dall year001
Solids, total suspendedweekly average≤ 2627 lb/dall year001
Nitrogen, total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, total [as N]weekly averagereport only (mg/L)all year001
Nitrogen, total [as N]monthly averagereport only (lb/d)all year001
Nitrogen, total [as N]weekly averagereport only (lb/d)all year001
Nitrogen, ammonia total [as N]monthly average≤ 2 mg/LJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 1.83 mg/LMar–Oct001
Nitrogen, ammonia total [as N]weekly average≤ 3 mg/LJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]weekly average≤ 2.75 mg/LMar–Oct001
Nitrogen, ammonia total [as N]monthly average≤ 117 lb/dJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 107 lb/dMar–Oct001
Nitrogen, ammonia total [as N]weekly average≤ 176 lb/dJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]weekly average≤ 161 lb/dMar–Oct001
Phosphorus, total [as P]monthly averagereport only (mg/L)all year001
Phosphorus, total [as P]weekly averagereport only (mg/L)all year001
Phosphorus, total [as P]monthly averagereport only (lb/d)all year001
Phosphorus, total [as P]weekly averagereport only (lb/d)all year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantweekly averagereport only (MGD)all year001
E. coli30-day geometric mean≤ 126 MPN/100mLall year001
E. colidaily maximum≤ 349 MPN/100mLall year001
E. colimonthly average≤ 126 MPN/100mLall year001
E. colidaily maximum≤ 800 MPN/100mLall year001
Mercury, total [as Hg]monthly averagereport only (ng/L)all year001
Mercury, total [as Hg]daily maximumreport only (ng/L)all year001
Mercury, total [as Hg]monthly averagereport only (lb/d)all year001
Mercury, total [as Hg]daily maximumreport only (lb/d)all year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 15 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 584 lb/dall year001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 876 lb/dall year001
Solids, suspended percent removalmonthly average minimum≥ 85 %all year001
Carbonaceous oxygen demand, % removalmonthly average minimum≥ 85 %all year001
Flow, in conduit or thru treatment plantmonthly average≤ 2.5 MGDall year004
Flow, in conduit or thru treatment plantweekly average≤ 2.5 MGDall year004
Chlorine, total residualmonthly average≤ .011 mg/Lall year004
Chlorine, total residualdaily maximum≤ .019 mg/Lall year004
Chlorine, total residualmonthly average≤ .23 lb/dall year004
Chlorine, total residualdaily maximum≤ .4 lb/dall year004
LC50 Static 48Hr Acute Ceriodaphnia dubiadaily minimumreport only (%)all year004
%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiamonthly average≤ 25 %all year004
%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiadaily maximum≤ 40 %all year004
IC25 Static Renewal 7 Day Chronic Ceriodaphnia dubiadaily minimumreport only (%)all year004
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year006
Flow, in conduit or thru treatment plantweekly averagereport only (MGD)all year006
Chlorine, total residualmonthly average≤ .011 mg/Lall year006
Chlorine, total residualdaily maximum≤ .019 mg/Lall year006
Chlorine, total residualmonthly average≤ .6 lb/dall year006
Chlorine, total residualdaily maximum≤ 1.1 lb/dall year006
LC50 Static 48Hr Acute Ceriodaphnia dubiadaily minimumreport only (%)all year006
%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiamonthly average≤ 25 %all year006
%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiadaily maximum≤ 40 %all year006
IC25 Static Renewal 7 Day Chronic Ceriodaphnia dubiadaily minimumreport only (%)all year006
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year007
Flow, in conduit or thru treatment plantweekly averagereport only (MGD)all year007
Chlorine, total residualmonthly average≤ .33 mg/Lall year007
Chlorine, total residualdaily maximum≤ .56 mg/Lall year007
Chlorine, total residualmonthly average≤ 19.3 lb/dall year007
Chlorine, total residualdaily maximum≤ 32.7 lb/dall year007
LC50 Static 48Hr Acute Ceriodaphnia dubiadaily minimumreport only (%)all year007
%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiamonthly average≤ 25 %all year007
%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiadaily maximum≤ 40 %all year007
Pass/Fail Static 48Hr Acute Ceriodaphnia dubiadaily maximum≤ 0 pass=0;fail=1all year007
IC25 Static Renewal 7 Day Chronic Ceriodaphnia dubiadaily minimumreport only (%)all year007

How strict are these limits?

Cited limits by parameter: South Carolina'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/SC0041696 · MCP: https://passage-data.com/mcp