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Merck Sharp & Dohme LLC

Medicinals And Botanicals, major discharger, Elkton, Virginia. NPDES permit VA0002178, in force until Dec 31, 2026. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 10 days after each period: outfall 001 form M1 monthly (31 values), outfall 101 form M1 monthly (18 values), outfall 101 form Q1 quarterly (124 values), outfall 102 form M1 monthly (4 values), outfall 003 form S1 twice a year
Renewal application due
Jul 4, 2026 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 0 of 42 reports late

Limits in force (182)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. centigrademaximum≤ 37 deg Call year001
Oxygen, dissolved [DO]minimum≥ 4.5 mg/Lall year001
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year001
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year001
BOD, 5-day, 20 deg. Cmonthly average≤ 1570 kg/dall year001
BOD, 5-day, 20 deg. Cdaily maximum≤ 3100 kg/dall year001
Oxygen demand, chem. [low level] [COD]monthly averagereport only (mg/L)all year001
Oxygen demand, chem. [low level] [COD]daily maximumreport only (mg/L)all year001
Oxygen demand, chem. [low level] [COD]monthly averagereport only (kg/d)all year001
Oxygen demand, chem. [low level] [COD]daily maximumreport only (kg/d)all year001
pHminimum≥ 6.5 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspendedmonthly averagereport only (mg/L)all year001
Solids, total suspendeddaily maximumreport only (mg/L)all year001
Solids, total suspendedmonthly average≤ 2700 kg/dall year001
Solids, total suspendeddaily maximum≤ 5400 kg/dall year001
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year001
Nitrogen, ammonia total [as N]monthly average≤ 645.9 kg/dall year001
Nitrogen, ammonia total [as N]daily maximum≤ 1300 kg/dall year001
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/L)all year001
Nitrogen, Kjeldahl, total [as N]monthly average≤ 1291 kg/dall year001
Nitrogen, Kjeldahl, total [as N]daily maximum≤ 2600 kg/dall year001
Temperature, length of excursionmonthly maximum≤ 446 minall 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
Chlorine, total residualmonthly average≤ .06 mg/Lall year001
Chlorine, total residualdaily maximum≤ .12 mg/Lall year001
Length of longest pH excursionevent total≤ 60 minall year001
pH range excursions, monthly total accummonthly maximum≤ 446 minall year001
Solids, total suspendedmaximumreport only (mg/L)all year003
Nitrogen, total [as N]maximumreport only (mg/L)all year003
Nitrogen, Kjeldahl, total [as N]maximumreport only (mg/L)all year003
Nitrite + Nitrate total [as N]maximumreport only (mg/L)all year003
Phosphorus, total [as P]maximumreport only (mg/L)all year003
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year101
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year101
BOD, 5-day, 20 deg. Cmonthly average≤ 310 kg/dall year101
BOD, 5-day, 20 deg. Cdaily maximum≤ 620 kg/dall year101
Oxygen demand, chem. [low level] [COD]monthly average≤ 240 mg/Lall year101
Oxygen demand, chem. [low level] [COD]daily maximum≤ 480 mg/Lall year101
Oxygen demand, chem. [low level] [COD]monthly average≤ 1100 kg/dall year101
Oxygen demand, chem. [low level] [COD]daily maximum≤ 2200 kg/dall year101
Solids, total suspendedmonthly averagereport only (mg/L)all year101
Solids, total suspendeddaily maximumreport only (mg/L)all year101
Solids, total suspendedmonthly average≤ 530 kg/dall year101
Solids, total suspendeddaily maximum≤ 1000 kg/dall year101
Nitrogen, ammonia total [as N]monthly average≤ 29.4 mg/Lall year101
Nitrogen, ammonia total [as N]daily maximum≤ 61.8 mg/Lall year101
Nitrogen, ammonia total [as N]monthly average≤ 130 kg/dall year101
Nitrogen, ammonia total [as N]daily maximum≤ 280 kg/dall year101
Cyanide, total [as CN]monthly average≤ .46 mg/Lall year101
Cyanide, total [as CN]daily maximum≤ .64 mg/Lall year101
Cyanide, total [as CN]monthly average≤ 2.1 kg/dall year101
Cyanide, total [as CN]daily maximum≤ 2.9 kg/dall year101
Methyl cellosolvemonthly average≤ 40.6 mg/Lall year101
Methyl cellosolvedaily maximum≤ 100 mg/Lall year101
Methyl cellosolvemonthly average≤ 180 kg/dall year101
Methyl cellosolvedaily maximum≤ 450 kg/dall year101
Chloroformmonthly average≤ .013 mg/Lall year101
Chloroformdaily maximum≤ .02 mg/Lall year101
Chloroformmonthly average≤ .059 kg/dall year101
Chloroformdaily maximum≤ .091 kg/dall year101
Toluenemonthly average≤ .02 mg/Lall year101
Toluenedaily maximum≤ .06 mg/Lall year101
Toluenemonthly average≤ .091 kg/dall year101
Toluenedaily maximum≤ .27 kg/dall year101
Benzenemonthly average≤ .02 mg/Lall year101
Benzenedaily maximum≤ .05 mg/Lall year101
Benzenemonthly average≤ .091 kg/dall year101
Benzenedaily maximum≤ .23 kg/dall year101
Chlorobenzenemonthly average≤ .06 mg/Lall year101
Chlorobenzenedaily maximum≤ .15 mg/Lall year101
Chlorobenzenemonthly average≤ .27 kg/dall year101
Chlorobenzenedaily maximum≤ .68 kg/dall year101
Methylene chloridemonthly average≤ .3 mg/Lall year101
Methylene chloridedaily maximum≤ .9 mg/Lall year101
Methylene chloridemonthly average≤ 1.4 kg/dall year101
Methylene chloridedaily maximum≤ 4.1 kg/dall year101
1,2-Dichloroethane, total weightmonthly average≤ .1 mg/Lall year101
1,2-Dichloroethane, total weightdaily maximum≤ .4 mg/Lall year101
1,2-Dichloroethane, total weightmonthly average≤ .45 kg/dall year101
1,2-Dichloroethane, total weightdaily maximum≤ 1.8 kg/dall year101
1,2-Dichlorobenzenemonthly average≤ .06 mg/Lall year101
1,2-Dichlorobenzenedaily maximum≤ .15 mg/Lall year101
1,2-Dichlorobenzenemonthly average≤ .27 kg/dall year101
1,2-Dichlorobenzenedaily maximum≤ .68 kg/dall year101
Phenolmonthly average≤ .02 mg/Lall year101
Phenoldaily maximum≤ .05 mg/Lall year101
Phenolmonthly average≤ .091 kg/dall year101
Phenoldaily maximum≤ .23 kg/dall year101
Isopropyl acetatemonthly average≤ .5 mg/Lall year101
Isopropyl acetatedaily maximum≤ 1.3 mg/Lall year101
Isopropyl acetatemonthly average≤ 2.3 kg/dall year101
Isopropyl acetatedaily maximum≤ 5.9 kg/dall year101
Flow, in conduit or thru treatment plantmonthly average≤ 1.2 MGDall year101
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year101
Methyl formatemonthly average≤ .5 mg/Lall year101
Methyl formatedaily maximum≤ 1.3 mg/Lall year101
Methyl formatemonthly average≤ 2.3 kg/dall year101
Methyl formatedaily maximum≤ 5.9 kg/dall year101
Isobutyraldehydemonthly average≤ .5 mg/Lall year101
Isobutyraldehydedaily maximum≤ 1.2 mg/Lall year101
Isobutyraldehydemonthly average≤ 2.3 kg/dall year101
Isobutyraldehydedaily maximum≤ 5.4 kg/dall year101
n-Amyl acetatemonthly average≤ .5 mg/Lall year101
n-Amyl acetatedaily maximum≤ 1.3 mg/Lall year101
n-Amyl acetatemonthly average≤ 2.3 kg/dall year101
n-Amyl acetatedaily maximum≤ 5.9 kg/dall year101
Amyl alcoholmonthly average≤ 4.1 mg/Lall year101
Amyl alcoholdaily maximum≤ 10 mg/Lall year101
Amyl alcoholmonthly average≤ 19 kg/dall year101
Amyl alcoholdaily maximum≤ 45 kg/dall year101
Acetonitrilemonthly average≤ 10.2 mg/Lall year101
Acetonitriledaily maximum≤ 25 mg/Lall year101
Acetonitrilemonthly average≤ 46 kg/dall year101
Acetonitriledaily maximum≤ 110 kg/dall year101
Ethanolmonthly average≤ 4.1 mg/Lall year101
Ethanoldaily maximum≤ 10 mg/Lall year101
Ethanolmonthly average≤ 19 kg/dall year101
Ethanoldaily maximum≤ 45 kg/dall year101
Isopropanolmonthly average≤ 1.6 mg/Lall year101
Isopropanoldaily maximum≤ 3.9 mg/Lall year101
Isopropanolmonthly average≤ 7.3 kg/dall year101
Isopropanoldaily maximum≤ 18 kg/dall year101
Diethylaminemonthly average≤ 102 mg/Lall year101
Diethylaminedaily maximum≤ 250 mg/Lall year101
Diethylaminemonthly average≤ 460 kg/dall year101
Diethylaminedaily maximum≤ 1100 kg/dall year101
Dimethyl sulfoxide, totalmonthly average≤ 37.5 mg/Lall year101
Dimethyl sulfoxide, totaldaily maximum≤ 91.5 mg/Lall year101
Dimethyl sulfoxide, totalmonthly average≤ 170 kg/dall year101
Dimethyl sulfoxide, totaldaily maximum≤ 420 kg/dall year101
Triethylaminemonthly average≤ 102 mg/Lall year101
Triethylaminedaily maximum≤ 250 mg/Lall year101
Triethylaminemonthly average≤ 460 kg/dall year101
Triethylaminedaily maximum≤ 1100 kg/dall year101
Isopropyl ethermonthly average≤ 2.6 mg/Lall year101
Isopropyl etherdaily maximum≤ 8.4 mg/Lall year101
Isopropyl ethermonthly average≤ 12 kg/dall year101
Isopropyl etherdaily maximum≤ 38 kg/dall year101
n-Butyl acetatemonthly average≤ .5 mg/Lall year101
n-Butyl acetatedaily maximum≤ 1.3 mg/Lall year101
n-Butyl acetatemonthly average≤ 2.3 kg/dall year101
n-Butyl acetatedaily maximum≤ 5.9 kg/dall year101
Methanol, totalmonthly average≤ 4.1 mg/Lall year101
Methanol, totaldaily maximum≤ 10 mg/Lall year101
Methanol, totalmonthly average≤ 19 kg/dall year101
Methanol, totaldaily maximum≤ 45 kg/dall year101
4-Methyl-2-pentanonemonthly average≤ .2 mg/Lall year101
4-Methyl-2-pentanonedaily maximum≤ .5 mg/Lall year101
4-Methyl-2-pentanonemonthly average≤ .91 kg/dall year101
4-Methyl-2-pentanonedaily maximum≤ 2.3 kg/dall year101
Heptanemonthly average≤ .02 mg/Lall year101
Heptanedaily maximum≤ .05 mg/Lall year101
Heptanemonthly average≤ .091 kg/dall year101
Heptanedaily maximum≤ .23 kg/dall year101
Xylene [mix of m+o+p]monthly average≤ .01 mg/Lall year101
Xylene [mix of m+o+p]daily maximum≤ .03 mg/Lall year101
Xylene [mix of m+o+p]monthly average≤ .045 kg/dall year101
Xylene [mix of m+o+p]daily maximum≤ .14 kg/dall year101
Acetonemonthly average≤ .2 mg/Lall year101
Acetonedaily maximum≤ .5 mg/Lall year101
Acetonemonthly average≤ .91 kg/dall year101
Acetonedaily maximum≤ 2.3 kg/dall year101
Ethyl acetatemonthly average≤ .5 mg/Lall year101
Ethyl acetatedaily maximum≤ 1.3 mg/Lall year101
Ethyl acetatemonthly average≤ 2.3 kg/dall year101
Ethyl acetatedaily maximum≤ 5.9 kg/dall year101
Hexanemonthly average≤ .02 mg/Lall year101
Hexanedaily maximum≤ .03 mg/Lall year101
Hexanemonthly average≤ .091 kg/dall year101
Hexanedaily maximum≤ .14 kg/dall year101
Tetrahydrofuranmonthly average≤ 2.6 mg/Lall year101
Tetrahydrofurandaily maximum≤ 8.4 mg/Lall year101
Tetrahydrofuranmonthly average≤ 12 kg/dall year101
Tetrahydrofurandaily maximum≤ 38 kg/dall year101
Flow, in conduit or thru treatment plantmonthly average≤ .15 MGDall year102
Flow, in conduit or thru treatment plantmaximumreport only (MGD)all year102
Chlorine, total residualinstantaneous minimum≥ .6 mg/Lall year102
E. coligeometric mean≤ 126 #/100mLall year102

How strict are these limits?

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

Same industry: the 13 Chemicals and Allied Products permits in Virginia.

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