NACHURS ALPINE SOLUTIONS LLC - ST GABRIEL SITE
NPDES ID: LA0127490
E — SNC: Effluent violation (monthly average limit)
The facility discharged more of a pollutant than its permit allows, based on a monthly average.
Violations
March 31, 2026
Solids, total suspended
65% over limit
Discharged 81 mg/L against a permitted limit of 49 mg/L (MO AVG)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 9.07 SU against a permitted limit of 9 SU (INST MAX)
DMR, Limited - Numeric Violation
Carbon, tot organic [TOC]
250% over limit
Discharged 175 mg/L against a permitted limit of 50 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
96% over limit
Discharged 66.7 mg/L against a permitted limit of 34 mg/L (MO AVG)
DMR, Limited - Numeric Violation
February 28, 2026
Carbon, tot organic [TOC]
3% over limit
Discharged 51.3 mg/L against a permitted limit of 50 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
135% over limit
Discharged 79.9 mg/L against a permitted limit of 34 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
52% over limit
Discharged 74.7 mg/L against a permitted limit of 49 mg/L (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2026
BOD, 5-day, 20 deg. C
1% over limit
Discharged 34.3 mg/L against a permitted limit of 34 mg/L (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2025
BOD, 5-day, 20 deg. C
5% over limit
Discharged 35.8 mg/L against a permitted limit of 34 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Coliform, fecal general
400% over limit
Discharged 1000 MPN/100mL against a permitted limit of 200 MPN/100mL (MO AVG)
DMR, Limited - Numeric Violation
Coliform, fecal general
150% over limit
Discharged 1000 MPN/100mL against a permitted limit of 400 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
November 30, 2025
Solids, total suspended
58% over limit
Discharged 77.5 mg/L against a permitted limit of 49 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Carbon, tot organic [TOC]
13% over limit
Discharged 56.4 mg/L against a permitted limit of 50 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
209% over limit
Discharged 105 mg/L against a permitted limit of 34 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
14% over limit
Discharged 105 mg/L against a permitted limit of 92 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
September 30, 2025
Carbon, tot organic [TOC]
450% over limit
Discharged 275 mg/L against a permitted limit of 50 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
218% over limit
Discharged 156 mg/L against a permitted limit of 49 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
221% over limit
Discharged 109 mg/L against a permitted limit of 34 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
18% over limit
Discharged 109 mg/L against a permitted limit of 92 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
June 30, 2025
Coliform, fecal general
607% over limit
Discharged 1414 MPN/100mL against a permitted limit of 200 MPN/100mL (MO AVG)
DMR, Limited - Numeric Violation
Coliform, fecal general
400% over limit
Discharged 2000 MPN/100mL against a permitted limit of 400 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
February 28, 2025
Carbon, tot organic [TOC]
168% over limit
Discharged 134 mg/L against a permitted limit of 50 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
491% over limit
Discharged 201 mg/L against a permitted limit of 34 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
18% over limit
Discharged 58 mg/L against a permitted limit of 49 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
118% over limit
Discharged 201 mg/L against a permitted limit of 92 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
December 31, 2024
Coliform, fecal general
203% over limit
Discharged 1210 MPN/100mL against a permitted limit of 400 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
Coliform, fecal general
505% over limit
Discharged 1210 MPN/100mL against a permitted limit of 200 MPN/100mL (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
5% over limit
Discharged 51.5 mg/L against a permitted limit of 49 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Zinc, total [as Zn]
10% over limit
Discharged 1.15000005 mg/L against a permitted limit of 1.05000005 mg/L (MO AVG)
DMR, Limited - Numeric Violation
October 31, 2024
Carbon, tot organic [TOC]
10% over limit
Discharged 55.2 mg/L against a permitted limit of 50 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
September 30, 2024
BOD, 5-day, 20 deg. C
34% over limit
Discharged 45.4 mg/L against a permitted limit of 34 mg/L (MO AVG)
DMR, Limited - Numeric Violation
August 31, 2024
BOD, 5-day, 20 deg. C
303% over limit
Discharged 137 mg/L against a permitted limit of 34 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
49% over limit
Discharged 137 mg/L against a permitted limit of 92 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
88% over limit
Discharged 92 mg/L against a permitted limit of 49 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Carbon, tot organic [TOC]
32% over limit
Discharged 66 mg/L against a permitted limit of 50 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)