AFTON CHEMICAL ADDITIVES CORPORATION+

NPDES permit TX0005835 · Major NON-POTW · administratively continued, expires 2024-11-19 · EPA's file as of 2026-09-19

Check this month's numbers before you file
Watch this permit — $79 a month. Every Monday, from EPA's newest files: the next report due and when, whether EPA's file holds your last one, any change to this permit's limits or status, and the renewal date.

This permit expired on 2024-11-19 and is administratively continued: its last limits keep applying until a new permit is issued, and EPA still expects the reports.

EPA's record, 2025-09-01 to 2026-08-31

0values over a limit
0required values missing, on 0 form(s)
0of 77 forms filed late

Last period with anything received: 2026-08-31.

Reporting

Reports are due about 20 days after each monitoring period ends (the most common figure among TX permits in EPA's filings — check your permit).

Limits in force (111)

OutfallParameterStatisticLimitMonths
001BOD, 5-day, 20 deg. CDAILY AV <= 5525 lb/d all year
001BOD, 5-day, 20 deg. CDAILY MX <= 10427 lb/d all year
001Oxygen demand, chem. [high level] [COD]DAILY AV <= 38276 lb/d all year
001Oxygen demand, chem. [high level] [COD]DAILY MX <= 74640 lb/d all year
001pHMINIMUM >= 5 SU all year
001pHMAXIMUM <= 11 SU all year
001Solids, total suspendedDAILY AV <= 5361 lb/d all year
001Solids, total suspendedDAILY MX <= 10396 lb/d all year
001Oil & GreaseDAILY AV <= 2174 lb/d all year
001Oil & GreaseDAILY MX <= 3779 lb/d all year
001Nitrogen, ammonia total [as N]DAILY AV <= 1797 lb/d all year
001Nitrogen, ammonia total [as N]DAILY MX <= 3924 lb/d all year
001Sulfide, total [as S]DAILY AV <= 29.7 lb/d all year
001Sulfide, total [as S]DAILY MX <= 65.1 lb/d all year
001Chromium, hexavalent [as Cr]DAILY AV <= 3.68 lb/d all year
001Chromium, hexavalent [as Cr]DAILY MX <= 8.15 lb/d all year
001Chromium, total [as Cr]DAILY AV <= 39.08 lb/d all year
001Chromium, total [as Cr]DAILY MX <= 112.4 lb/d all year
001Flow, in conduit or thru treatment plantDAILY AV <= 24 MGD all year
001Flow, in conduit or thru treatment plantDAILY MX <= 32 MGD all year
001Cyanide, free availableDAILY AV <= 1.14 lb/d all year
001Cyanide, free availableDAILY MX <= 2.4 lb/d all year
001Phenolic compounds, totalDAILY AV <= 35.24 lb/d all year
001Phenolic compounds, totalDAILY MX <= 73.6 lb/d all year
001pH range excursions, > 60 minutesMO TOTAL <= 0 occur/mo all year
001pH range excursions, monthly total accumMO TOTAL <= 446 min all year
002BOD, 5-day, 20 deg. CDAILY AV <= 26 mg/L all year
002BOD, 5-day, 20 deg. CDAILY MX <= 48 mg/L all year
002Oxygen demand, chem. [high level] [COD]DAILY AV <= 180 mg/L all year
002Oxygen demand, chem. [high level] [COD]DAILY MX <= 360 mg/L all year
002pHMINIMUM >= 6 SU all year
002pHMAXIMUM <= 9 SU all year
002Solids, total suspendedDAILY AV <= 21 mg/L all year
002Solids, total suspendedDAILY MX <= 33 mg/L all year
002Oil & GreaseDAILY AV <= 8 mg/L all year
002Oil & GreaseDAILY MX <= 15 mg/L all year
002Nitrogen, ammonia total [as N]DAILY AV <= 9.4 mg/L all year
002Nitrogen, ammonia total [as N]DAILY MX <= 20 mg/L all year
002Carbon, tot organic [TOC]DAILY MX <= 75 mg/L all year
002Sulfide, total [as S]DAILY AV <= .14 mg/L all year
002Sulfide, total [as S]DAILY MX <= .31 mg/L all year
002Chromium, hexavalent [as Cr]DAILY AV <= .0075 mg/L all year
002Chromium, hexavalent [as Cr]DAILY MX <= .016 mg/L all year
002Chromium, total [as Cr]DAILY AV <= .43 mg/L all year
002Chromium, total [as Cr]DAILY MX <= .73 mg/L all year
002Flow, in conduit or thru treatment plantDAILY AV report only all year
002Flow, in conduit or thru treatment plantDAILY MX report only all year
002Cyanide, free availableDAILY AV report only all year
002Cyanide, free availableDAILY MX report only all year
002Phenolic compounds, totalDAILY AV <= .17 mg/L all year
002Phenolic compounds, totalDAILY MX <= .35 mg/L all year
003pHMINIMUM >= 6 SU all year
003pHMAXIMUM <= 9 SU all year
003Oil & GreaseDAILY MX <= 15 mg/L all year
003Carbon, tot organic [TOC]DAILY MX <= 75 mg/L all year
003Flow, in conduit or thru treatment plantDAILY AV report only all year
003Flow, in conduit or thru treatment plantDAILY MX report only all year
004pHMINIMUM >= 6 SU all year
004pHMAXIMUM <= 9 SU all year
004Oil & GreaseDAILY MX <= 15 mg/L all year
004Carbon, tot organic [TOC]DAILY MX <= 75 mg/L all year
004Flow, in conduit or thru treatment plantDAILY AV report only all year
004Flow, in conduit or thru treatment plantDAILY MX report only all year
005pHMINIMUM >= 6 SU all year
005pHMAXIMUM <= 9 SU all year
005Oil & GreaseDAILY MX <= 15 mg/L all year
005Carbon, tot organic [TOC]DAILY MX <= 75 mg/L all year
005Flow, in conduit or thru treatment plantDAILY AV report only all year
005Flow, in conduit or thru treatment plantDAILY MX report only all year
011pHMINIMUM >= 6 SU all year
011pHMAXIMUM <= 9 SU all year
011Oil & GreaseDAILY MX <= 15 mg/L all year
011Carbon, tot organic [TOC]DAILY MX report only all year
011Flow, in conduit or thru treatment plantDAILY AV report only all year
011Flow, in conduit or thru treatment plantDAILY MX report only all year
TX1Whole effluent toxicity - retest #17 DA MIN report only all year
TX1Whole effluent toxicity - retest #17 DA MIN report only all year
TX1Whole effluent toxicity - retest #1MO AV MN report only all year
TX1Whole effluent toxicity - retest #1MO AV MN report only all year
TX1Whole effluent toxicity - retest #27 DA MIN report only all year
TX1Whole effluent toxicity - retest #27 DA MIN report only all year
TX1Whole effluent toxicity - retest #2MO AV MN report only all year
TX1Whole effluent toxicity - retest #2MO AV MN report only all year
TX1Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia)7 DA MIN report only all year
TX1Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia)MO AV MN report only all year
TX1Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia menidia7 DA MIN report only all year
TX1Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia menidiaMO AV MN report only all year
TX1NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)7 DA MIN report only all year
TX1NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)MO AV MN report only all year
TX1NOEC Lethal Static Renewal 7 Day Chronic Menidia menidia7 DA MIN report only all year
TX1NOEC Lethal Static Renewal 7 Day Chronic Menidia menidiaMO AV MN report only all year
TX1NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)7 DA MIN report only all year
TX1NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)MO AV MN report only all year
TX1NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia7 DA MIN report only all year
TX1NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia menidiaMO AV MN report only all year
TX1Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)7 DA MIN report only all year
TX1Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)MO AV MN report only all year
TX1Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia7 DA MIN report only all year
TX1Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia menidiaMO AV MN report only all year
TX1LOEC Lethal Survival Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)7 DA MIN report only all year
TX1LOEC Lethal Survival Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)MO AV MN report only all year
TX1LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia menidia7 DA MIN report only all year
TX1LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia menidiaMO AV MN report only all year
TX1LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia)7 DA MIN report only all year
TX1LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia)MO AV MN report only all year
TX1LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Menidia menidia7 DA MIN report only all year
TX1LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Menidia menidiaMO AV MN report only all year
TXAWhole effluent toxicity - retest #1SINGSAMP report only all year
TXAWhole effluent toxicity - retest #2SINGSAMP report only all year
TXALC50 Pass/Fail Static 24Hr Acute Americamysis bahia (formerly Mysidopsis bahia)SINGSAMP report only all year
TXALC50 Pass/Fail Static 24Hr Acute Menidia menidiaSINGSAMP report only all year

Built from EPA's ECHO bulk files. EPA's file, not the permit document, is the source: read your permit. Check a report before you file it · All states