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Almatis, Inc.

Industrial Inorganic Chemicals, Bauxite, Arkansas. NPDES permit AR0050270 expired Jun 30, 2025; its limits still apply. Last 12 months: over a limit 2 times (last March 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: outfall 001 form A monthly (33 values), outfall TX1 form Q quarterly (17 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 15 reports late

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

Period endingParameterReportedLimitOver by
March 2026Aluminum, total [as Al], daily maximum2.11 mg/L≤ 2 mg/L6%
March 2026Aluminum, total [as Al], monthly average1.48 mg/L≤ 1 mg/L48%

Limits in force (51)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]instantaneous minimum≥ 3 mg/LMay–Oct001
Oxygen, dissolved [DO]instantaneous minimum≥ 5 mg/LJan, Feb, Mar, Apr, Nov, Dec001
pHminimum≥ 6 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 20 mg/Lall year001
Solids, total suspendeddaily maximum≤ 30 mg/Lall year001
Solids, total suspendedmonthly average≤ 360.3 lb/dall year001
Solids, total suspendeddaily maximum≤ 540.4 lb/dall year001
Chloride [as Cl]monthly average≤ 271 mg/Lall year001
Chloride [as Cl]daily maximum≤ 406 mg/Lall year001
Chloride [as Cl]monthly average≤ 4881.9 lb/dall year001
Chloride [as Cl]daily maximum≤ 7313.8 lb/dall year001
Sulfate, total [as SO4]monthly average≤ 1597 mg/Lall year001
Sulfate, total [as SO4]daily maximum≤ 2396 mg/Lall year001
Sulfate, total [as SO4]monthly average≤ 28769 lb/dall year001
Sulfate, total [as SO4]daily maximum≤ 43162.5 lb/dall year001
Selenium, total recoverablemonthly average≤ 5.6 ug/Lall year001
Selenium, total recoverabledaily maximum≤ 11.2 ug/Lall year001
Selenium, total recoverablemonthly average≤ .1 lb/dall year001
Selenium, total recoverabledaily maximum≤ .2 lb/dall year001
Zinc, total [as Zn]monthly average≤ 115.6 ug/Lall year001
Zinc, total [as Zn]daily maximum≤ 232 ug/Lall year001
Zinc, total [as Zn]monthly average≤ 2.1 lb/dall year001
Zinc, total [as Zn]daily maximum≤ 4.2 lb/dall year001
Aluminum, total [as Al]monthly average≤ 1 mg/Lall year001
Aluminum, total [as Al]daily maximum≤ 2 mg/Lall year001
Aluminum, total [as Al]monthly average≤ 18 lb/dall year001
Aluminum, total [as Al]daily maximum≤ 36 lb/dall year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Solids, total dissolvedmonthly average≤ 2595 mg/Lall year001
Solids, total dissolveddaily maximum≤ 3893 mg/Lall year001
Solids, total dissolvedmonthly average≤ 46747.4 lb/dall year001
Solids, total dissolveddaily maximum≤ 70130.1 lb/dall year001
WET, sublethal retest #17-day averagereport only (pass=0;fail=1)all yearTX1
WET, sublethal retest #27-day averagereport only (pass=0;fail=1)all yearTX1
Whole Effluent Toxicity, Sub-Lethal Retest #37-day averagereport only (pass=0;fail=1)all yearTX1
Whole Effluent Toxicity [WET] - C. dubiadaily average minimum≥ 100 %all yearTX1
Whole Effluent Toxicity [WET] - C. dubia7-day minimum≥ 100 %all yearTX1
Whole Effluent Toxicity [WET] - C. dubiadaily average minimum≥ 80 %all yearTX1
Whole Effluent Toxicity [WET] - C. dubia7-day minimum≥ 80 %all yearTX1
Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia7-day averagereport only (pass=0;fail=1)all yearTX1
Pass/Fail Static Renewal 7Day Chronic Pimephales promelas7-day averagereport only (pass=0;fail=1)all yearTX1
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia7-day averagereport only (pass=0;fail=1)all yearTX1
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas7-day averagereport only (pass=0;fail=1)all yearTX1
NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia7-day averagereport only (%)all yearTX1
NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas7-day averagereport only (%)all yearTX1
NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia7-day averagereport only (%)all yearTX1
NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas7-day averagereport only (%)all yearTX1
Coef Of Var Static Renewal 7Day Chronic Ceriodaphnia dubia7-day averagereport only (%)all yearTX1
Coef Of Var Static Renewal 7Day Chronic Pimephales promelas7-day averagereport only (%)all yearTX1

How strict are these limits?

Cited limits by parameter: Arkansas's rules and the federal ones.

Same industry: the 15 Chemicals and Allied Products permits in Arkansas.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/AR0050270 · MCP: https://passage-data.com/mcp