Compass Minerals America Inc — NPDES permit LA0103233: limits, due date and EPA's record

Chemical And Fertilizer Mining, Lydia, Louisiana. NPDES permit LA0103233, in force until Feb 28, 2029. Last 12 months: over a limit 8 times (last March 2026). Source: EPA ECHO, Oct 22, 2026.

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

Period ending	Outfall	Parameter	Reported	Limit	Over by
October 2025	002	pH, instantaneous minimum	5.85 SU	≥ 6 SU	—
November 2025	002	pH, instantaneous minimum	5.75 SU	≥ 6 SU	—
December 2025	002	pH, instantaneous minimum	5.52 SU	≥ 6 SU	—
January 2026	002	pH, instantaneous minimum	5.34 SU	≥ 6 SU	—
February 2026	002	pH, instantaneous minimum	5.46 SU	≥ 6 SU	—
March 2026	002	pH, instantaneous minimum	5.95 SU	≥ 6 SU	—
March 2026	101	Solids, total suspended, daily maximum	86 mg/L	≤ 45 mg/L	91%
March 2026	101	Solids, total suspended, monthly average	57 mg/L	≤ 30 mg/L	90%

Limits in force (74)

Parameter	Statistic	Limit	Months	Outfall
pH	instantaneous minimum	≥ 6 SU	all year	001
pH	instantaneous minimum	≥ 6 SU	all year	001
pH	instantaneous maximum	≤ 9 SU	all year	001
pH	instantaneous maximum	≤ 9 SU	all year	001
Oil & Grease	daily maximum	≤ 15 mg/L	all year	001
Oil & Grease	daily maximum	≤ 15 mg/L	all year	001
Carbon, tot organic [TOC]	daily maximum	≤ 50 mg/L	all year	001
Carbon, tot organic [TOC]	daily maximum	≤ 50 mg/L	all year	001
Flow, in conduit or thru treatment plant	monthly average	report only (gal/d)	all year	001
Flow, in conduit or thru treatment plant	monthly average	report only (gal/d)	all year	001
Flow, in conduit or thru treatment plant	daily maximum	report only (gal/d)	all year	001
Flow, in conduit or thru treatment plant	daily maximum	report only (gal/d)	all year	001
pH	instantaneous minimum	≥ 6 SU	all year	002
pH	instantaneous minimum	≥ 6 SU	all year	002
pH	instantaneous maximum	≤ 9 SU	all year	002
pH	instantaneous maximum	≤ 9 SU	all year	002
Oil & Grease	daily maximum	≤ 15 mg/L	all year	002
Oil & Grease	daily maximum	≤ 15 mg/L	all year	002
Carbon, tot organic [TOC]	daily maximum	≤ 50 mg/L	all year	002
Carbon, tot organic [TOC]	daily maximum	≤ 50 mg/L	all year	002
Flow, in conduit or thru treatment plant	monthly average	report only (gal/d)	all year	002
Flow, in conduit or thru treatment plant	monthly average	report only (gal/d)	all year	002
Flow, in conduit or thru treatment plant	daily maximum	report only (gal/d)	all year	002
Flow, in conduit or thru treatment plant	daily maximum	report only (gal/d)	all year	002
BOD, 5-day, 20 deg. C	monthly average	≤ 30 mg/L	all year	003
BOD, 5-day, 20 deg. C	daily maximum	≤ 45 mg/L	all year	003
pH	instantaneous minimum	≥ 6 SU	all year	003
pH	instantaneous maximum	≤ 9 SU	all year	003
Solids, total suspended	monthly average	≤ 30 mg/L	all year	003
Solids, total suspended	daily maximum	≤ 45 mg/L	all year	003
Flow, in conduit or thru treatment plant	monthly average	report only (gal/d)	all year	003
Flow, in conduit or thru treatment plant	daily maximum	report only (gal/d)	all year	003
Chlorine, total residual	monthly average	report only (mg/L)	all year	003
Chlorine, total residual	daily maximum	report only (mg/L)	all year	003
Enterococci	monthly geometric mean	≤ 35 #/100mL	all year	003
Enterococci	daily maximum	≤ 135 #/100mL	all year	003
Coliform, fecal general	monthly geometric mean	≤ 200 #/100mL	all year	003
Coliform, fecal general	daily maximum	≤ 400 #/100mL	all year	003
BOD, 5-day, 20 deg. C	monthly average	≤ 30 mg/L	all year	004
BOD, 5-day, 20 deg. C	daily maximum	≤ 45 mg/L	all year	004
pH	instantaneous minimum	≥ 6 SU	all year	004
pH	instantaneous maximum	≤ 9 SU	all year	004
Solids, total suspended	monthly average	≤ 30 mg/L	all year	004
Solids, total suspended	daily maximum	≤ 45 mg/L	all year	004
Flow, in conduit or thru treatment plant	monthly average	report only (gal/d)	all year	004
Flow, in conduit or thru treatment plant	daily maximum	report only (gal/d)	all year	004
Chlorine, total residual	monthly average	report only (mg/L)	all year	004
Chlorine, total residual	daily maximum	report only (mg/L)	all year	004
Enterococci	monthly geometric mean	≤ 35 #/100mL	all year	004
Enterococci	daily maximum	≤ 135 #/100mL	all year	004
Coliform, fecal general	monthly geometric mean	≤ 200 #/100mL	all year	004
Coliform, fecal general	daily maximum	≤ 400 #/100mL	all year	004
BOD, 5-day, 20 deg. C	monthly average	≤ 30 mg/L	all year	101
BOD, 5-day, 20 deg. C	monthly average	≤ 30 mg/L	all year	101
BOD, 5-day, 20 deg. C	daily maximum	≤ 45 mg/L	all year	101
BOD, 5-day, 20 deg. C	daily maximum	≤ 45 mg/L	all year	101
Solids, total suspended	monthly average	≤ 30 mg/L	all year	101
Solids, total suspended	monthly average	≤ 30 mg/L	all year	101
Solids, total suspended	daily maximum	≤ 45 mg/L	all year	101
Solids, total suspended	daily maximum	≤ 45 mg/L	all year	101
Flow, in conduit or thru treatment plant	monthly average	report only (MGD)	all year	101
Flow, in conduit or thru treatment plant	monthly average	report only (MGD)	all year	101
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	101
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	101
Chlorine, total residual	monthly average	report only (mg/L)	all year	101
Chlorine, total residual	monthly average	report only (mg/L)	all year	101
Chlorine, total residual	daily maximum	report only (mg/L)	all year	101
Chlorine, total residual	daily maximum	report only (mg/L)	all year	101
Enterococci	monthly geometric mean	≤ 35 #/100mL	all year	101
Enterococci	daily maximum	≤ 135 #/100mL	all year	101
Coliform, fecal general	monthly geometric mean	≤ 200 #/100mL	all year	101
Coliform, fecal general	monthly geometric mean	≤ 200 #/100mL	all year	101
Coliform, fecal general	daily maximum	≤ 400 #/100mL	all year	101
Coliform, fecal general	daily maximum	≤ 400 #/100mL	all year	101

How strict are these limits?

Your permit document is the final word. As JSON: /api/v1/permits/LA0103233 · MCP: https://passage-data.com/mcp