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

Magnolia Water Utility Operating Co., LLC

Sewerage Systems, major discharger, Slidell, Louisiana. NPDES permit LA0045446, in force until Sep 30, 2029. Last 12 months: over a limit 72 times (last August 2026), 4 of 20 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: form A monthly (18 values), form ME quarterly (11 values), form MY quarterly (11 values), form Q quarterly (6 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
27 values over a limit, 0 required values missing, 3 of 24 reports late

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

All 72 values over a limit
Period endingParameterReportedLimitOver by
October 2025Coliform, fecal general, daily maximum2260 #/100mL≤ 400 #/100mL465%
October 2025Enterococci, daily maximum271 #/100mL≤ 135 #/100mL101%
October 2025Nitrogen, ammonia total [as N], daily maximum11 mg/L≤ 10 mg/L10%
November 2025BOD, carbonaceous [5 day, 20 C], daily maximum20 mg/L≤ 15 mg/L33%
November 2025Coliform, fecal general, daily maximum1840 #/100mL≤ 400 #/100mL360%
November 2025Coliform, fecal general, monthly geometric mean< 202 #/100mL≤ 200 #/100mL1%
November 2025Nitrogen, ammonia total [as N], daily maximum16 mg/L≤ 10 mg/L60%
November 2025Nitrogen, ammonia total [as N], monthly average8.6 mg/L≤ 5 mg/L72%
December 2025BOD, carbonaceous [5 day, 20 C], daily maximum87 mg/L≤ 15 mg/L480%
December 2025BOD, carbonaceous [5 day, 20 C], monthly average22 mg/L≤ 10 mg/L120%
December 2025Coliform, fecal general, daily maximum4416 #/100mL≤ 400 #/100mL1004%
December 2025Nitrogen, ammonia total [as N], daily maximum21 mg/L≤ 10 mg/L110%
December 2025Nitrogen, ammonia total [as N], monthly average< 5.1 mg/L≤ 5 mg/L2%
December 2025Solids, total suspended, daily maximum50 mg/L≤ 23 mg/L117%
January 2026BOD, carbonaceous [5 day, 20 C], daily maximum36 mg/L≤ 15 mg/L140%
January 2026BOD, carbonaceous [5 day, 20 C], monthly average13 mg/L≤ 10 mg/L30%
January 2026Coliform, fecal general, daily maximum5520 #/100mL≤ 400 #/100mL1280%
February 2026BOD, carbonaceous [5 day, 20 C], daily maximum27 mg/L≤ 15 mg/L80%
February 2026BOD, carbonaceous [5 day, 20 C], monthly average18 mg/L≤ 10 mg/L80%
February 2026Coliform, fecal general, daily maximum2760 #/100mL≤ 400 #/100mL590%
February 2026Nitrogen, ammonia total [as N], daily maximum12 mg/L≤ 10 mg/L20%
February 2026Nitrogen, ammonia total [as N], monthly average6.7 mg/L≤ 5 mg/L34%
February 2026Solids, total suspended, daily maximum27 mg/L≤ 23 mg/L17%
March 2026BOD, carbonaceous [5 day, 20 C], daily maximum68 mg/L≤ 15 mg/L353%
March 2026BOD, carbonaceous [5 day, 20 C], monthly average35 mg/L≤ 10 mg/L250%
March 2026Nitrogen, ammonia total [as N], daily maximum26 mg/L≤ 10 mg/L160%
March 2026Nitrogen, ammonia total [as N], monthly average11.5 mg/L≤ 5 mg/L130%
March 2026Solids, total suspended, daily maximum28 mg/L≤ 23 mg/L22%
March 2026Solids, total suspended, monthly average19 mg/L≤ 15 mg/L27%
April 2026BOD, carbonaceous [5 day, 20 C], daily maximum102 mg/L≤ 15 mg/L580%
April 2026BOD, carbonaceous [5 day, 20 C], monthly average67 mg/L≤ 10 mg/L570%
April 2026Coliform, fecal general, daily maximum5720 #/100mL≤ 400 #/100mL1330%
April 2026Nitrogen, ammonia total [as N], daily maximum33 mg/L≤ 10 mg/L230%
April 2026Nitrogen, ammonia total [as N], monthly average< 22 mg/L≤ 5 mg/L340%
April 2026Solids, total suspended, daily maximum47 mg/L≤ 23 mg/L104%
April 2026Solids, total suspended, monthly average25 mg/L≤ 15 mg/L67%
May 2026BOD, carbonaceous [5 day, 20 C], daily maximum70 mg/L≤ 15 mg/L367%
May 2026BOD, carbonaceous [5 day, 20 C], monthly average51 mg/L≤ 10 mg/L410%
May 2026Coliform, fecal general, daily maximum5520 #/100mL≤ 400 #/100mL1280%
May 2026Enterococci, daily maximum4839 #/100mL≤ 135 #/100mL3484%
May 2026Enterococci, monthly geometric mean> 423 #/100mL≤ 35 #/100mL—
May 2026Nitrogen, ammonia total [as N], daily maximum31 mg/L≤ 10 mg/L210%
May 2026Nitrogen, ammonia total [as N], monthly average19.3 mg/L≤ 5 mg/L286%
May 2026Solids, total suspended, daily maximum30 mg/L≤ 23 mg/L30%
May 2026Solids, total suspended, monthly average21 mg/L≤ 15 mg/L40%
June 2026BOD, carbonaceous [5 day, 20 C], daily maximum73 mg/L≤ 15 mg/L387%
June 2026BOD, carbonaceous [5 day, 20 C], monthly average53 mg/L≤ 10 mg/L430%
June 2026Coliform, fecal general, daily maximum13800 #/100mL≤ 400 #/100mL3350%
June 2026Coliform, fecal general, monthly geometric mean6112 #/100mL≤ 200 #/100mL2956%
June 2026Enterococci, daily maximum> 2420 #/100mL≤ 135 #/100mL—
June 2026Enterococci, monthly geometric mean> 2420 #/100mL≤ 35 #/100mL—
June 2026Nitrogen, ammonia total [as N], daily maximum40 mg/L≤ 10 mg/L300%
June 2026Nitrogen, ammonia total [as N], monthly average21.6 mg/L≤ 5 mg/L332%
June 2026Solids, total suspended, daily maximum27 mg/L≤ 23 mg/L17%
June 2026Solids, total suspended, monthly average22 mg/L≤ 15 mg/L47%
July 2026BOD, carbonaceous [5 day, 20 C], daily maximum60 mg/L≤ 15 mg/L300%
July 2026BOD, carbonaceous [5 day, 20 C], monthly average37 mg/L≤ 10 mg/L270%
July 2026Coliform, fecal general, daily maximum13800 #/100mL≤ 400 #/100mL3350%
July 2026Coliform, fecal general, monthly geometric mean< 360 #/100mL≤ 200 #/100mL80%
July 2026Enterococci, daily maximum2420 #/100mL≤ 135 #/100mL1693%
July 2026Enterococci, monthly geometric mean> 329 #/100mL≤ 35 #/100mL—
July 2026Nitrogen, ammonia total [as N], daily maximum26 mg/L≤ 10 mg/L160%
July 2026Nitrogen, ammonia total [as N], monthly average15.6 mg/L≤ 5 mg/L212%
July 2026Solids, total suspended, daily maximum25 mg/L≤ 23 mg/L9%
July 2026Solids, total suspended, monthly average17 mg/L≤ 15 mg/L13%
August 2026BOD, carbonaceous [5 day, 20 C], daily maximum64 mg/L≤ 15 mg/L327%
August 2026BOD, carbonaceous [5 day, 20 C], monthly average25 mg/L≤ 10 mg/L150%
August 2026Coliform, fecal general, daily maximum5520 #/100mL≤ 400 #/100mL1280%
August 2026Enterococci, daily maximum2420 #/100mL≤ 135 #/100mL1693%
August 2026Enterococci, monthly geometric mean> 49 #/100mL≤ 35 #/100mL—
August 2026Nitrogen, ammonia total [as N], daily maximum17 mg/L≤ 10 mg/L70%
August 2026Nitrogen, ammonia total [as N], monthly average12 mg/L≤ 5 mg/L140%

Limits in force (46)

ParameterStatisticLimitMonths
pHinstantaneous minimum≥ 6 SUall year
pHinstantaneous maximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 15 mg/Lall year
Solids, total suspendeddaily maximum≤ 23 mg/Lall year
Solids, total suspendedmonthly average≤ 133 lb/dall year
Nitrogen, total [as N]monthly averagereport only (mg/L)all year
Nitrogen, total [as N]daily maximumreport only (mg/L)all year
Nitrogen, total [as N]monthly averagereport only (lb/d)all year
Nitrogen, ammonia total [as N]monthly average≤ 5 mg/Lall year
Nitrogen, ammonia total [as N]daily maximum≤ 10 mg/Lall year
Nitrogen, ammonia total [as N]monthly average≤ 44 lb/dall year
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]daily maximumreport only (mg/L)all year
Phosphorus, total [as P]monthly averagereport only (lb/d)all year
Whole effluent toxicity - retest #148-hour minimumreport only (pass=0;fail=1)all year
Whole effluent toxicity - retest #148-hour minimumreport only (pass=0;fail=1)all year
Whole effluent toxicity - retest #1monthly average minimumreport only (pass=0;fail=1)all year
Whole effluent toxicity - retest #1monthly average minimumreport only (pass=0;fail=1)all year
Whole effluent toxicity - retest #248-hour minimumreport only (pass=0;fail=1)all year
Whole effluent toxicity - retest #248-hour minimumreport only (pass=0;fail=1)all year
Whole effluent toxicity - retest #2monthly average minimumreport only (pass=0;fail=1)all year
Whole effluent toxicity - retest #2monthly average minimumreport only (pass=0;fail=1)all 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 residualinstantaneous maximum≤ .13 mg/Lall year
Whole Effluent Toxicity - Retest #348-hour minimumreport only (pass=0;fail=1)all year
Whole Effluent Toxicity - Retest #348-hour minimumreport only (pass=0;fail=1)all year
Whole Effluent Toxicity - Retest #3monthly average minimumreport only (pass=0;fail=1)all year
Whole Effluent Toxicity - Retest #3monthly average minimumreport only (pass=0;fail=1)all year
Enterococcimonthly geometric mean≤ 35 #/100mLall year
Enterococcidaily maximum≤ 135 #/100mLall year
Coliform, fecal generalmonthly geometric mean≤ 200 #/100mLall year
Coliform, fecal generaldaily maximum≤ 400 #/100mLall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/Lall year
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 15 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 88 lb/dall year
LF Pass/Fail Static Renewal 48Hr Acute Americamysis bahia (formerly Mysidopis bahia)48-hour minimumreport only (pass=0;fail=1)all year
LF Pass/Fail Static Renewal 48Hr Acute Americamysis bahia (formerly Mysidopis bahia)monthly average minimumreport only (pass=0;fail=1)all year
Low Flow Pass/Fail Static Renewal 48Hr Acute Menidia beryllina48-hour minimumreport only (pass=0;fail=1)all year
Low Flow Pass/Fail Static Renewal 48Hr Acute Menidia beryllinamonthly average minimumreport only (pass=0;fail=1)all year
NOAEC Lethal Static Renewal 48HR Acute Americamysis bahia (formerly Mysidopsis bahia)48-hour minimumreport only (%)all year
NOAEC Lethal Static Renewal 48HR Acute Americamysis bahia (formerly Mysidopsis bahia)monthly average minimumreport only (%)all year
NOAEC Lethal Static Renewal 48HR Acute Menidia beryllina48-hour minimumreport only (%)all year
NOAEC Lethal Static Renewal 48HR Acute Menidia beryllinamonthly average minimumreport only (%)all year
Coef Of Var Static Renewal 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia)maximumreport only (%)all year
Coef Of Var Static Renewal 48Hr Acute Menidia beryllinamaximumreport only (%)all year

How strict are these limits?

Cited limits by parameter: Louisiana'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/LA0045446 · MCP: https://passage-data.com/mcp