Americas Styrenics LLC - Hanging Rock — NPDES permit OH0099309: limits, due date and EPA's record

Plastics Materials And Resins, major discharger, Ironton, Ohio. NPDES permit OH0099309, in force until Aug 31, 2027. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Limits in force (291)

Parameter	Statistic	Limit	Months	Outfall
BOD, 5-day, 20 deg. C	monthly average	report only (mg/L)	all year	002
BOD, 5-day, 20 deg. C	daily maximum	report only (mg/L)	all year	002
Solids, total suspended	monthly average	report only (mg/L)	all year	002
Solids, total suspended	daily maximum	report only (mg/L)	all year	002
Oil and grease, hexane extr method	daily maximum	≤ 10 mg/L	all year	002
Carbon, tot organic [TOC]	monthly average	report only (mg/L)	all year	002
Carbon, tot organic [TOC]	daily maximum	report only (mg/L)	all year	002
Zinc, total recoverable	monthly average	report only (ug/L)	all year	002
Zinc, total recoverable	daily maximum	report only (ug/L)	all year	002
Oxidants, total residual	daily maximum	≤ .0024 mg/L	all year	002
Rainfall	monthly average	report only (in)	all year	002
Rainfall	daily maximum	report only (in)	all year	002
Flow, in conduit or thru treatment plant	monthly average	report only (MGD)	all year	002
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	002
Chlorine, total residual	daily maximum	≤ .038 mg/L	all year	002
Mercury, total low level	monthly average	report only (ng/L)	Mar, Jun, Aug, Dec	002
Mercury, total low level	daily maximum	report only (ng/L)	Mar, Jun, Aug, Dec	002
pH, maximum	daily maximum	≤ 9 SU	all year	002
pH, minimum	daily minimum	≥ 6.5 SU	all year	002
Styrene	monthly average	report only (ug/L)	all year	002
Styrene	daily maximum	report only (ug/L)	all year	002
BOD, 5-day, 20 deg. C	monthly average	≤ 24 mg/L	all year	601
BOD, 5-day, 20 deg. C	daily maximum	≤ 61 mg/L	all year	601
BOD, 5-day, 20 deg. C	monthly average	≤ 1.0853 kg/d	all year	601
BOD, 5-day, 20 deg. C	daily maximum	≤ 2.648 kg/d	all year	601
Solids, total suspended	monthly average	≤ 38 mg/L	all year	601
Solids, total suspended	daily maximum	≤ 115 mg/L	all year	601
Solids, total suspended	monthly average	≤ 1.6494 kg/d	all year	601
Solids, total suspended	daily maximum	≤ 4.993 kg/d	all year	601
Oil and grease [soxhlet extr.] tot.	monthly average	≤ 15 mg/L	all year	601
Oil and grease [soxhlet extr.] tot.	daily maximum	≤ 20 mg/L	all year	601
Oil and grease [soxhlet extr.] tot.	monthly average	≤ .6512 kg/d	all year	601
Oil and grease [soxhlet extr.] tot.	daily maximum	≤ .8683 kg/d	all year	601
Carbon, tot organic [TOC]	monthly average	report only (mg/L)	all year	601
Carbon, tot organic [TOC]	daily maximum	report only (mg/L)	all year	601
Cyanide, total [as CN]	monthly average	≤ .39 mg/L	all year	601
Cyanide, total [as CN]	daily maximum	≤ 1.2 mg/L	all year	601
Cyanide, total [as CN]	monthly average	≤ .0169 kg/d	all year	601
Cyanide, total [as CN]	daily maximum	≤ .0521 kg/d	all year	601
Chromium, total [as Cr]	monthly average	≤ 1110 ug/L	all year	601
Chromium, total [as Cr]	daily maximum	≤ 2770 ug/L	all year	601
Chromium, total [as Cr]	monthly average	≤ .0482 kg/d	all year	601
Chromium, total [as Cr]	daily maximum	≤ .1203 kg/d	all year	601
Copper, total [as Cu]	daily maximum	≤ 390 ug/L	all year	601
Copper, total [as Cu]	daily maximum	≤ .0169 kg/d	all year	601
Lead, total [as Pb]	monthly average	≤ 320 ug/L	all year	601
Lead, total [as Pb]	daily maximum	≤ 690 ug/L	all year	601
Lead, total [as Pb]	monthly average	≤ .0139 kg/d	all year	601
Lead, total [as Pb]	daily maximum	≤ .02996 kg/d	all year	601
Nickel, total [as Ni]	monthly average	≤ 1690 ug/L	all year	601
Nickel, total [as Ni]	daily maximum	≤ 3980 ug/L	all year	601
Nickel, total [as Ni]	monthly average	≤ .0734 kg/d	all year	601
Nickel, total [as Ni]	daily maximum	≤ .1728 kg/d	all year	601
Zinc, total [as Zn]	monthly average	≤ 1050 ug/L	all year	601
Zinc, total [as Zn]	daily maximum	≤ 2610 ug/L	all year	601
Zinc, total [as Zn]	monthly average	≤ .0456 kg/d	all year	601
Zinc, total [as Zn]	daily maximum	≤ .1133 kg/d	all year	601
Coliform, fecal MF, MFC broth, 44.5 C	monthly geometric mean	≤ 1000 #/100mL	Jan, Feb, Mar, Apr, Nov, Dec	601
Coliform, fecal MF, MFC broth, 44.5 C	weekly geometric mean	≤ 2000 #/100mL	Jan, Feb, Mar, Apr, Nov, Dec	601
E. coli, MTEC-MF	monthly geometric mean	≤ 126 MPN/100mL	May–Oct	601
E. coli, MTEC-MF	weekly geometric mean	≤ 240 MPN/100mL	May–Oct	601
Carbon tetrachloride	monthly average	≤ 18 ug/L	Sep	601
Carbon tetrachloride	daily maximum	≤ 38 ug/L	Sep	601
Carbon tetrachloride	monthly average	≤ .0008 kg/d	Sep	601
Carbon tetrachloride	daily maximum	≤ .0016 kg/d	Sep	601
1,2-Dichloroethane	monthly average	≤ 68 ug/L	Sep	601
1,2-Dichloroethane	daily maximum	≤ 211 ug/L	Sep	601
1,2-Dichloroethane	monthly average	≤ .003 kg/d	Sep	601
1,2-Dichloroethane	daily maximum	≤ .0092 kg/d	Sep	601
Chloroform	monthly average	≤ 21 ug/L	Sep	601
Chloroform	daily maximum	≤ 46 ug/L	Sep	601
Chloroform	monthly average	≤ .0009 kg/d	Sep	601
Chloroform	daily maximum	≤ .002 kg/d	Sep	601
Toluene	monthly average	≤ 26 ug/L	Sep	601
Toluene	daily maximum	≤ 80 ug/L	Sep	601
Toluene	monthly average	≤ .00113 kg/d	Sep	601
Toluene	daily maximum	≤ .0035 kg/d	Sep	601
Benzene	monthly average	≤ 37 ug/L	Sep	601
Benzene	daily maximum	≤ 136 ug/L	Sep	601
Benzene	monthly average	≤ .0016 kg/d	Sep	601
Benzene	daily maximum	≤ .0059 kg/d	Sep	601
Acenaphthylene	monthly average	≤ 22 ug/L	Sep	601
Acenaphthylene	daily maximum	≤ 59 ug/L	Sep	601
Acenaphthylene	monthly average	≤ .00096 kg/d	Sep	601
Acenaphthylene	daily maximum	≤ .0026 kg/d	Sep	601
Acenaphthene	monthly average	≤ 22 ug/L	Sep	601
Acenaphthene	daily maximum	≤ 59 ug/L	Sep	601
Acenaphthene	monthly average	≤ .00096 kg/d	Sep	601
Acenaphthene	daily maximum	≤ .0026 kg/d	Sep	601
Acrylonitrile	monthly average	≤ 96 ug/L	Sep	601
Acrylonitrile	daily maximum	≤ 242 ug/L	Sep	601
Acrylonitrile	monthly average	≤ .0042 kg/d	Sep	601
Acrylonitrile	daily maximum	≤ .0105 kg/d	Sep	601
Anthracene	monthly average	≤ 4.3 ug/L	Sep	601
Anthracene	daily maximum	≤ 59 ug/L	Sep	601
Anthracene	monthly average	≤ .00019 kg/d	Sep	601
Anthracene	daily maximum	≤ .00256 kg/d	Sep	601
Benzo[b]fluoranthene	monthly average	≤ 23 ug/L	Sep	601
Benzo[b]fluoranthene	daily maximum	≤ 61 ug/L	Sep	601
Benzo[b]fluoranthene	monthly average	≤ .001 kg/d	Sep	601
Benzo[b]fluoranthene	daily maximum	≤ .0026 kg/d	Sep	601
Benzo[k]fluoranthene	monthly average	≤ 22 ug/L	Sep	601
Benzo[k]fluoranthene	daily maximum	≤ 59 ug/L	Sep	601
Benzo[k]fluoranthene	monthly average	≤ .00096 kg/d	Sep	601
Benzo[k]fluoranthene	daily maximum	≤ .0026 kg/d	Sep	601
Benzo[a]pyrene	monthly average	≤ 23 ug/L	Sep	601
Benzo[a]pyrene	daily maximum	≤ 61 ug/L	Sep	601
Benzo[a]pyrene	monthly average	≤ .001 kg/d	Sep	601
Benzo[a]pyrene	daily maximum	≤ .0026 kg/d	Sep	601
Chlorobenzene	monthly average	≤ 15 ug/L	Sep	601
Chlorobenzene	daily maximum	≤ 28 ug/L	Sep	601
Chlorobenzene	monthly average	≤ .00065 kg/d	Sep	601
Chlorobenzene	daily maximum	≤ .0012 kg/d	Sep	601
Chrysene	monthly average	≤ 22 ug/L	Sep	601
Chrysene	daily maximum	≤ 59 ug/L	Sep	601
Chrysene	monthly average	≤ .00096 kg/d	Sep	601
Chrysene	daily maximum	≤ .0026 kg/d	Sep	601
Diethyl phthalate	monthly average	≤ 81 ug/L	Sep	601
Diethyl phthalate	daily maximum	≤ 203 ug/L	Sep	601
Diethyl phthalate	monthly average	≤ .0035 kg/d	Sep	601
Diethyl phthalate	daily maximum	≤ .009 kg/d	Sep	601
Dimethyl phthalate	monthly average	≤ 19 ug/L	Sep	601
Dimethyl phthalate	daily maximum	≤ 47 ug/L	Sep	601
Dimethyl phthalate	monthly average	≤ .0008 kg/d	Sep	601
Dimethyl phthalate	daily maximum	≤ .002 kg/d	Sep	601
Ethylbenzene	monthly average	≤ 32 ug/L	Sep	601
Ethylbenzene	daily maximum	≤ 108 ug/L	Sep	601
Ethylbenzene	monthly average	≤ .0014 kg/d	Sep	601
Ethylbenzene	daily maximum	≤ .0047 kg/d	Sep	601
Fluoranthene	monthly average	≤ 25 ug/L	Sep	601
Fluoranthene	daily maximum	≤ 68 ug/L	Sep	601
Fluoranthene	monthly average	≤ .0011 kg/d	Sep	601
Fluoranthene	daily maximum	≤ .003 kg/d	Sep	601
Fluorene	monthly average	≤ 22 ug/L	Sep	601
Fluorene	daily maximum	≤ 59 ug/L	Sep	601
Fluorene	monthly average	≤ .00096 kg/d	Sep	601
Fluorene	daily maximum	≤ .0026 kg/d	Sep	601
Hexachloroethane	monthly average	≤ 21 ug/L	Sep	601
Hexachloroethane	daily maximum	≤ 54 ug/L	Sep	601
Hexachloroethane	monthly average	≤ .0009 kg/d	Sep	601
Hexachloroethane	daily maximum	≤ .0023 kg/d	Sep	601
Methyl chloride [Chloromethane]	monthly average	≤ 86 ug/L	Sep	601
Methyl chloride [Chloromethane]	daily maximum	≤ 190 ug/L	Sep	601
Methyl chloride [Chloromethane]	monthly average	≤ .0037 kg/d	Sep	601
Methyl chloride [Chloromethane]	daily maximum	≤ .0082 kg/d	Sep	601
Methylene chloride	monthly average	≤ 40 ug/L	Sep	601
Methylene chloride	daily maximum	≤ 89 ug/L	Sep	601
Methylene chloride	monthly average	≤ .0017 kg/d	Sep	601
Methylene chloride	daily maximum	≤ .0039 kg/d	Sep	601
Nitrobenzene	monthly average	≤ 27 ug/L	Sep	601
Nitrobenzene	daily maximum	≤ 68 ug/L	Sep	601
Nitrobenzene	monthly average	≤ .0012 kg/d	Sep	601
Nitrobenzene	daily maximum	≤ .003 kg/d	Sep	601
Phenanthrene	monthly average	≤ 22 ug/L	Sep	601
Phenanthrene	daily maximum	≤ 59 ug/L	Sep	601
Phenanthrene	monthly average	≤ .00096 kg/d	Sep	601
Phenanthrene	daily maximum	≤ .0026 kg/d	Sep	601
Pyrene	monthly average	≤ 25 ug/L	Sep	601
Pyrene	daily maximum	≤ 67 ug/L	Sep	601
Pyrene	monthly average	≤ .0011 kg/d	Sep	601
Pyrene	daily maximum	≤ .0029 kg/d	Sep	601
Tetrachloroethylene	monthly average	≤ 22 ug/L	Sep	601
Tetrachloroethylene	daily maximum	≤ 56 ug/L	Sep	601
Tetrachloroethylene	monthly average	≤ .00096 kg/d	Sep	601
Tetrachloroethylene	daily maximum	≤ .0024 kg/d	Sep	601
1,1-Dichloroethane	monthly average	≤ 22 ug/L	Sep	601
1,1-Dichloroethane	daily maximum	≤ 59 ug/L	Sep	601
1,1-Dichloroethane	monthly average	≤ .00096 kg/d	Sep	601
1,1-Dichloroethane	daily maximum	≤ .0026 kg/d	Sep	601
1,1-Dichloroethylene	monthly average	≤ 16 ug/L	Sep	601
1,1-Dichloroethylene	daily maximum	≤ 25 ug/L	Sep	601
1,1-Dichloroethylene	monthly average	≤ .0007 kg/d	Sep	601
1,1-Dichloroethylene	daily maximum	≤ .0011 kg/d	Sep	601
1,1,1-Trichloroethane	monthly average	≤ 21 ug/L	Sep	601
1,1,1-Trichloroethane	daily maximum	≤ 54 ug/L	Sep	601
1,1,1-Trichloroethane	monthly average	≤ .0009 kg/d	Sep	601
1,1,1-Trichloroethane	daily maximum	≤ .0023 kg/d	Sep	601
1,1,2-Trichloroethane	monthly average	≤ 21 ug/L	Sep	601
1,1,2-Trichloroethane	daily maximum	≤ 54 ug/L	Sep	601
1,1,2-Trichloroethane	monthly average	≤ .0009 kg/d	Sep	601
1,1,2-Trichloroethane	daily maximum	≤ .0023 kg/d	Sep	601
Benzo[a]anthracene	monthly average	≤ 22 ug/L	Sep	601
Benzo[a]anthracene	daily maximum	≤ 59 ug/L	Sep	601
Benzo[a]anthracene	monthly average	≤ .00096 kg/d	Sep	601
Benzo[a]anthracene	daily maximum	≤ .0026 kg/d	Sep	601
1,2-Dichlorobenzene	monthly average	≤ 77 ug/L	Sep	601
1,2-Dichlorobenzene	daily maximum	≤ 163 ug/L	Sep	601
1,2-Dichlorobenzene	monthly average	≤ .0033 kg/d	Sep	601
1,2-Dichlorobenzene	daily maximum	≤ .0071 kg/d	Sep	601
1,2-Dichloropropane	monthly average	≤ 153 ug/L	Sep	601
1,2-Dichloropropane	daily maximum	≤ 230 ug/L	Sep	601
1,2-Dichloropropane	monthly average	≤ .0066 kg/d	Sep	601
1,2-Dichloropropane	daily maximum	≤ .01 kg/d	Sep	601
trans-1,2-Dichloroethylene	monthly average	≤ 21 ug/L	Sep	601
trans-1,2-Dichloroethylene	daily maximum	≤ 54 ug/L	Sep	601
trans-1,2-Dichloroethylene	monthly average	≤ .00096 kg/d	Sep	601
trans-1,2-Dichloroethylene	daily maximum	≤ .0026 kg/d	Sep	601
1,2,4-Trichlorobenzene	monthly average	≤ 68 ug/L	Sep	601
1,2,4-Trichlorobenzene	daily maximum	≤ 140 ug/L	Sep	601
1,2,4-Trichlorobenzene	monthly average	≤ .003 kg/d	Sep	601
1,2,4-Trichlorobenzene	daily maximum	≤ .006 kg/d	Sep	601
1,3-Dichlorobenzene	monthly average	≤ 31 ug/L	Sep	601
1,3-Dichlorobenzene	daily maximum	≤ 44 ug/L	Sep	601
1,3-Dichlorobenzene	monthly average	≤ .0013 kg/d	Sep	601
1,3-Dichlorobenzene	daily maximum	≤ .0019 kg/d	Sep	601
1,4-Dichlorobenzene	monthly average	≤ 15 ug/L	Sep	601
1,4-Dichlorobenzene	daily maximum	≤ 28 ug/L	Sep	601
1,4-Dichlorobenzene	monthly average	≤ .00065 kg/d	Sep	601
1,4-Dichlorobenzene	daily maximum	≤ .0012 kg/d	Sep	601
2-Chlorophenol	monthly average	≤ 31 ug/L	Sep	601
2-Chlorophenol	daily maximum	≤ 98 ug/L	Sep	601
2-Chlorophenol	monthly average	≤ .0013 kg/d	Sep	601
2-Chlorophenol	daily maximum	≤ .0043 kg/d	Sep	601
2-Nitrophenol	monthly average	≤ 41 ug/L	Sep	601
2-Nitrophenol	daily maximum	≤ 69 ug/L	Sep	601
2-Nitrophenol	monthly average	≤ .0018 kg/d	Sep	601
2-Nitrophenol	daily maximum	≤ .003 kg/d	Sep	601
2,4-Dichlorophenol	monthly average	≤ 39 ug/L	Sep	601
2,4-Dichlorophenol	daily maximum	≤ 112 ug/L	Sep	601
2,4-Dichlorophenol	monthly average	≤ .0017 kg/d	Sep	601
2,4-Dichlorophenol	daily maximum	≤ .0049 kg/d	Sep	601
2,4-Dimethylphenol	monthly average	≤ 18 ug/L	Sep	601
2,4-Dimethylphenol	daily maximum	≤ 36 ug/L	Sep	601
2,4-Dimethylphenol	monthly average	≤ .0008 kg/d	Sep	601
2,4-Dimethylphenol	daily maximum	≤ .0016 kg/d	Sep	601
2,4-Dinitrotoluene	monthly average	≤ 113 ug/L	Sep	601
2,4-Dinitrotoluene	daily maximum	≤ 285 ug/L	Sep	601
2,4-Dinitrotoluene	monthly average	≤ .0049 kg/d	Sep	601
2,4-Dinitrotoluene	daily maximum	≤ .0124 kg/d	Sep	601
2,4-Dinitrophenol	monthly average	≤ 71 ug/L	Sep	601
2,4-Dinitrophenol	daily maximum	≤ 123 ug/L	Sep	601
2,4-Dinitrophenol	monthly average	≤ .0031 kg/d	Sep	601
2,4-Dinitrophenol	daily maximum	≤ .0053 kg/d	Sep	601
2,6-Dinitrotoluene	monthly average	≤ 255 ug/L	Sep	601
2,6-Dinitrotoluene	daily maximum	≤ 641 ug/L	Sep	601
2,6-Dinitrotoluene	monthly average	≤ .0111 kg/d	Sep	601
2,6-Dinitrotoluene	daily maximum	≤ .0278 kg/d	Sep	601
4-Nitrophenol	monthly average	≤ 72 ug/L	Sep	601
4-Nitrophenol	daily maximum	≤ 124 ug/L	Sep	601
4-Nitrophenol	monthly average	≤ .0031 kg/d	Sep	601
4-Nitrophenol	daily maximum	≤ .0054 kg/d	Sep	601
4,6-Dinitro-o-cresol	monthly average	≤ 78 ug/L	Sep	601
4,6-Dinitro-o-cresol	daily maximum	≤ 277 ug/L	Sep	601
4,6-Dinitro-o-cresol	monthly average	≤ .0034 kg/d	Sep	601
4,6-Dinitro-o-cresol	daily maximum	≤ .012 kg/d	Sep	601
Phenol	monthly average	≤ 15 ug/L	Sep	601
Phenol	daily maximum	≤ 26 ug/L	Sep	601
Phenol	monthly average	≤ .00065 kg/d	Sep	601
Phenol	daily maximum	≤ .0011 kg/d	Sep	601
Naphthalene	monthly average	≤ 22 ug/L	Sep	601
Naphthalene	daily maximum	≤ 59 ug/L	Sep	601
Naphthalene	monthly average	≤ .00096 kg/d	Sep	601
Naphthalene	daily maximum	≤ .0026 kg/d	Sep	601
Di[2-ethylhexyl] phthalate [DEHP]	monthly average	≤ 103 ug/L	Sep	601
Di[2-ethylhexyl] phthalate [DEHP]	daily maximum	≤ 279 ug/L	Sep	601
Di[2-ethylhexyl] phthalate [DEHP]	monthly average	≤ .0045 kg/d	Sep	601
Di[2-ethylhexyl] phthalate [DEHP]	daily maximum	≤ .0121 kg/d	Sep	601
Di-n-butyl phthalate	monthly average	≤ 27 ug/L	Sep	601
Di-n-butyl phthalate	daily maximum	≤ 57 ug/L	Sep	601
Di-n-butyl phthalate	monthly average	≤ .0012 kg/d	Sep	601
Di-n-butyl phthalate	daily maximum	≤ .0025 kg/d	Sep	601
Vinyl chloride	monthly average	≤ 104 ug/L	Sep	601
Vinyl chloride	daily maximum	≤ 268 ug/L	Sep	601
Vinyl chloride	monthly average	≤ .0045 kg/d	Sep	601
Vinyl chloride	daily maximum	≤ .0116 kg/d	Sep	601
Trichloroethylene	monthly average	≤ 21 ug/L	Sep	601
Trichloroethylene	daily maximum	≤ 54 ug/L	Sep	601
Trichloroethylene	monthly average	≤ .0009 kg/d	Sep	601
Trichloroethylene	daily maximum	≤ .0023 kg/d	Sep	601
Hexachlorobenzene	monthly average	≤ .1 ug/L	Sep	601
Hexachlorobenzene	daily maximum	≤ 28 ug/L	Sep	601
Hexachlorobenzene	monthly average	≤ .000004 kg/d	Sep	601
Hexachlorobenzene	daily maximum	≤ .0012 kg/d	Sep	601
Hexachlorobutadiene	monthly average	≤ 20 ug/L	Sep	601
Hexachlorobutadiene	daily maximum	≤ 49 ug/L	Sep	601
Hexachlorobutadiene	monthly average	≤ .0009 kg/d	Sep	601
Hexachlorobutadiene	daily maximum	≤ .0021 kg/d	Sep	601
Flow, in conduit or thru treatment plant	monthly average	report only (MGD)	all year	601
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	601
pH, maximum	daily maximum	≤ 9 SU	all year	601
pH, minimum	daily minimum	≥ 6.5 SU	all year	601
1,3-Dichloropropene	monthly average	≤ 29 ug/L	Sep	601
1,3-Dichloropropene	daily maximum	≤ 44 ug/L	Sep	601
1,3-Dichloropropene	monthly average	≤ .0013 kg/d	Sep	601
1,3-Dichloropropene	daily maximum	≤ .0019 kg/d	Sep	601
Styrene	monthly average	report only (ug/L)	all year	601
Styrene	daily maximum	report only (ug/L)	all year	601
Chloroethane	monthly average	≤ 104 ug/L	Sep	601
Chloroethane	daily maximum	≤ 268 ug/L	Sep	601
Chloroethane	monthly average	≤ .0045 kg/d	Sep	601
Chloroethane	daily maximum	≤ .0116 kg/d	Sep	601

How strict are these limits?

Your permit document is the final word. As JSON: /api/v1/permits/OH0099309 · MCP: https://passage-data.com/mcp