CENTERPOINT ENERGY - SIGECO F. B. CULLEY STATION

NPDES permit IN0002259 · Major NON-POTW · effective, expires 2028-02-29 · 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.

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

7values over a limit
1required values missing, on 1 form(s)
9of 89 forms filed late

Last period with anything received: 2026-08-31. Most often over: Silver total recoverable (6), Temperature, water deg. fahrenheit (1).

Reporting

Reports are due about 27 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (244)

OutfallParameterStatisticLimitMonths
000Arsenic, total recoverableMO AVG report only all year
000Arsenic, total recoverableDAILY MX report only all year
000Iron, total recoverableMO AVG report only all year
000Iron, total recoverableDAILY MX report only all year
000Selenium, total recoverableMO AVG report only all year
000Selenium, total recoverableDAILY MX report only all year
000Nickel, total recoverableMO AVG report only all year
000Nickel, total recoverableDAILY MX report only all year
000Silver total recoverableMO AVG report only all year
000Silver total recoverableDAILY MX report only all year
000Zinc, total recoverableMO AVG report only all year
000Zinc, total recoverableDAILY MX report only all year
000Aluminum, total recoverableMO AVG report only all year
000Aluminum, total recoverableDAILY MX report only all year
000Cadmium, total recoverableMO AVG report only all year
000Cadmium, total recoverableDAILY MX report only all year
000Copper, total recoverableMO AVG report only all year
000Copper, total recoverableDAILY MX report only all year
000Mercury, total recoverableMO AVG report only all year
000Mercury, total recoverableDAILY MX report only all year
000FlowMO AVG report only all year
000FlowMO AVG report only all year
000FlowMO AVG report only all year
000FlowDAILY MX report only all year
000FlowDAILY MX report only all year
000FlowDAILY MX report only all year
001Temperature, water deg. fahrenheitMO AVG report only all year
001Temperature, water deg. fahrenheitDAILY MX report only all year
001Temperature, water deg. fahrenheitMO AVG report only Dec
001Temperature, water deg. fahrenheitMO AVG report only Oct
001Temperature, water deg. fahrenheitMO AVG report only Jun, Sep
001Temperature, water deg. fahrenheitMO AVG report only Jan, Feb
001Temperature, water deg. fahrenheitMO AVG report only Mar
001Temperature, water deg. fahrenheitMO AVG report only Apr, Nov
001Temperature, water deg. fahrenheitMO AVG report only Jul, Aug
001Temperature, water deg. fahrenheitMO AVG report only May
001Temperature, water deg. fahrenheitDAILY MX <= 60 deg F Dec
001Temperature, water deg. fahrenheitDAILY MX <= 81 deg F Oct
001Temperature, water deg. fahrenheitDAILY MX <= 90 deg F Jun, Sep
001Temperature, water deg. fahrenheitDAILY MX <= 53 deg F Jan, Feb
001Temperature, water deg. fahrenheitDAILY MX <= 63 deg F Mar
001Temperature, water deg. fahrenheitDAILY MX <= 73 deg F Apr, Nov
001Temperature, water deg. fahrenheitDAILY MX <= 92 deg F Jul, Aug
001Temperature, water deg. fahrenheitDAILY MX <= 83 deg F May
001Temperature, water deg. fahrenheitMO AVG report only all year
001Temperature, water deg. fahrenheitDAILY MX report only all year
001Temperature, water deg. fahrenheitDAILY MX report only all year
001Temperature, water deg. fahrenheitDAILY MX <= 110 deg F all year
001Plant capacity fact. percent of capacityMO AVG report only all year
001Chlorine, total residual [dsg. time]DAILY MX <= 120 min/d all year
001Chlorine, total residual [dsg. time]DAILY MX <= 120 min/d all year
001pHDAILY MN >= 6 SU all year
001pHDAILY MX <= 9 SU all year
001Cyanide, free [as free]MO AVG report only all year
001Cyanide, free [as free]DAILY MX report only all year
001Chloride [as Cl]MO AVG report only Mar, Jun, Sep, Dec
001Chloride [as Cl]MO AVG report only Mar, Jun, Sep, Dec
001Chloride [as Cl]DAILY MX report only Mar, Jun, Sep, Dec
001Chloride [as Cl]DAILY MX report only Mar, Jun, Sep, Dec
001Sulfate, total [as SO4]MO AVG report only Mar, Jun, Sep, Dec
001Sulfate, total [as SO4]MO AVG report only Mar, Jun, Sep, Dec
001Sulfate, total [as SO4]DAILY MX report only Mar, Jun, Sep, Dec
001Sulfate, total [as SO4]DAILY MX report only Mar, Jun, Sep, Dec
001Fluoride, total [as F]MO AVG report only Mar, Jun, Sep, Dec
001Fluoride, total [as F]MO AVG report only Mar, Jun, Sep, Dec
001Fluoride, total [as F]DAILY MX report only Mar, Jun, Sep, Dec
001Fluoride, total [as F]DAILY MX report only Mar, Jun, Sep, Dec
001Arsenic, total recoverableMO AVG report only all year
001Arsenic, total recoverableDAILY MX report only all year
001Iron, total recoverableMO AVG report only all year
001Iron, total recoverableDAILY MX report only all year
001Selenium, total recoverableMO AVG report only all year
001Selenium, total recoverableDAILY MX report only all year
001Boron, total [as B]MO AVG report only Mar, Jun, Sep, Dec
001Boron, total [as B]MO AVG report only Mar, Jun, Sep, Dec
001Boron, total [as B]DAILY MX report only Mar, Jun, Sep, Dec
001Boron, total [as B]DAILY MX report only Mar, Jun, Sep, Dec
001Nickel, total recoverableMO AVG report only all year
001Nickel, total recoverableDAILY MX report only all year
001Silver total recoverableMO AVG report only all year
001Silver total recoverableMO AVG <= 3.8 ug/L all year
001Silver total recoverableDAILY MX report only all year
001Silver total recoverableDAILY MX <= 6.6 ug/L all year
001Zinc, total recoverableMO AVG report only all year
001Zinc, total recoverableDAILY MX report only all year
001Aluminum, total recoverableMO AVG report only all year
001Aluminum, total recoverableDAILY MX report only all year
001Cadmium, total recoverableMO AVG <= 2.1 ug/L all year
001Cadmium, total recoverableDAILY MX <= 4.2 ug/L all year
001Copper, total recoverableMO AVG <= 31 ug/L all year
001Copper, total recoverableDAILY MX <= 63 ug/L all year
001Oxidants, total residualMO AVG < 60 ug/L all year
001Oxidants, total residualDAILY MX < 60 ug/L all year
001Temperature, length of excursionMO TOTAL report only all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Chlorine, total residualMO AVG report only all year
001Chlorine, total residualDAILY MX <= .2 mg/L all year
001Chlorine, total residualMO AVG < .06 mg/L all year
001Chlorine, total residualDAILY MX < .06 mg/L all year
001Toxicity [acute], Ceriodaphnia dubiaMAXIMUM <= 1 tox acute (alert) Apr
001Toxicity [acute], Ceriodaphnia dubiaMAXIMUM <= 1 tox acute (alert) Apr
001Toxicity [acute], Ceriodaphnia dubiaMAXIMUM <= 1 tox acute (alert) Feb, Aug
001Toxicity [acute], Ceriodaphnia dubiaMAXIMUM <= 1 tox acute Mar, Sep
001Toxicity [acute], Ceriodaphnia dubiaMAXIMUM <= 1 tox acute Mar, Sep
001Toxicity [chronic], Ceriodaphnia dubiaMAXIMUM <= 7 tox chronic (alert) Apr
001Toxicity [chronic], Ceriodaphnia dubiaMAXIMUM <= 7 tox chronic (alert) Apr
001Toxicity [chronic], Ceriodaphnia dubiaMAXIMUM <= 7 tox chronic (alert) Feb, Aug
001Toxicity [chronic], Ceriodaphnia dubiaMAXIMUM <= 7 tox chronic Mar, Sep
001Toxicity [chronic], Ceriodaphnia dubiaMAXIMUM <= 7 tox chronic Mar, Sep
001Toxicity [acute], Pimephales promelas [Fathead Minnow]MAXIMUM <= 1 tox acute (alert) Apr
001Toxicity [acute], Pimephales promelas [Fathead Minnow]MAXIMUM <= 1 tox acute (alert) Apr
001Toxicity [acute], Pimephales promelas [Fathead Minnow]MAXIMUM <= 1 tox acute (alert) Feb, Aug
001Toxicity [acute], Pimephales promelas [Fathead Minnow]MAXIMUM <= 1 tox acute Mar, Sep
001Toxicity [acute], Pimephales promelas [Fathead Minnow]MAXIMUM <= 1 tox acute Mar, Sep
001Toxicity [chronic], Pimephales promelas [Fathead Minnow]MAXIMUM <= 7 tox chronic Apr
001Toxicity [chronic], Pimephales promelas [Fathead Minnow]MAXIMUM <= 7 tox chronic Apr
001Toxicity [chronic], Pimephales promelas [Fathead Minnow]MAXIMUM <= 7 tox chronic (alert) Feb, Aug
001Toxicity [chronic], Pimephales promelas [Fathead Minnow]MAXIMUM <= 7 tox chronic Mar, Sep
001Toxicity [chronic], Pimephales promelas [Fathead Minnow]MAXIMUM <= 7 tox chronic Mar, Sep
001Bromide [as Br]MO AVG report only Mar, Jun, Sep, Dec
001Bromide [as Br]MO AVG report only Mar, Jun, Sep, Dec
001Bromide [as Br]DAILY MX report only Mar, Jun, Sep, Dec
001Bromide [as Br]DAILY MX report only Mar, Jun, Sep, Dec
001Mercury, total recoverableMO AVG <= 12 ng/L Feb, Apr, Jun, Aug, Oct, Dec
001Mercury, total recoverableDAILY MX <= 20 ng/L Feb, Apr, Jun, Aug, Oct, Dec
001Chlorination frequencyDAILY MX <= 4 occur/d all year
001Chlorination durationDAILY MX <= 40 min all year
001Flow, totalMO TOTAL report only all year
001Month excursion time [min]CUM TOTL report only all year
004BOD, 5-day, 20 deg. CMO AVG <= 30 mg/L all year
004BOD, 5-day, 20 deg. CDAILY MX <= 45 mg/L all year
004pHDAILY MN >= 6 SU all year
004pHDAILY MX <= 9 SU all year
004Solids, total suspendedMO AVG <= 30 mg/L all year
004Solids, total suspendedDAILY MX <= 45 mg/L all year
004Flow, in conduit or thru treatment plantMO AVG report only all year
004Flow, in conduit or thru treatment plantDAILY MX report only all year
004E. coli, colony forming units [CFU]MO GEO <= 125 CFU/100mL Apr, May, Jun, Jul, Aug, Sep, Oct
004E. coli, colony forming units [CFU]DAILY MX <= 235 CFU/100mL Apr, May, Jun, Jul, Aug, Sep, Oct
004Coliform, fecal generalDAILY MX report only Jan, Feb, Mar, Nov, Dec
004Coliform, fecal generalDAILY MX <= 2000 #/100mL Jan, Feb, Mar, Nov, Dec
004Flow, totalMO TOTAL report only all year
005pHDAILY MX report only Jun, Dec
005pHDAILY MX report only Jun, Dec
005Solids, total suspendedDAILY MX report only Jun, Dec
005Solids, total suspendedDAILY MX report only Jun, Dec
005Oil and grease, hexane extr methodDAILY MX report only Jun, Dec
005Oil and grease, hexane extr methodDAILY MX report only Jun, Dec
005Nitrogen, Kjeldahl, total [as N]DAILY MX report only Jun, Dec
005Nitrogen, Kjeldahl, total [as N]DAILY MX report only Jun, Dec
005Nitrite + Nitrate total [as N]DAILY MX report only Jun, Dec
005Nitrite + Nitrate total [as N]DAILY MX report only Jun, Dec
005Phosphorus, total [as P]DAILY MX report only Jun, Dec
005Phosphorus, total [as P]DAILY MX report only Jun, Dec
005BOD, carbonaceous [5 day, 20 C]DAILY MX report only Jun, Dec
005BOD, carbonaceous [5 day, 20 C]DAILY MX report only Jun, Dec
005Chemical Oxygen Demand [COD]DAILY MX report only Jun, Dec
005Chemical Oxygen Demand [COD]DAILY MX report only Jun, Dec
005Storm water flowET report only Jun, Dec
005Storm water flowET report only Jun, Dec
006pHDAILY MN >= 6 SU all year
006pHDAILY MX <= 9 SU all year
006Solids, total suspendedMO AVG report only all year
006Solids, total suspendedDAILY MX report only all year
006Chloride [as Cl]MO AVG report only all year
006Chloride [as Cl]DAILY MX report only all year
006Sulfate, total [as SO4]MO AVG report only all year
006Sulfate, total [as SO4]DAILY MX report only all year
006Fluoride, total [as F]MO AVG report only all year
006Fluoride, total [as F]DAILY MX report only all year
006Arsenic, total recoverableMO AVG report only all year
006Arsenic, total recoverableDAILY MX report only all year
006Cobalt, total recoverableMO AVG report only all year
006Cobalt, total recoverableDAILY MX report only all year
006Selenium, total recoverableMO AVG report only all year
006Selenium, total recoverableDAILY MX report only all year
006Thallium, total recoverableMO AVG report only all year
006Thallium, total recoverableDAILY MX report only all year
006Barium, total recoverableMO AVG report only all year
006Barium, total recoverableDAILY MX report only all year
006Boron, total [as B]MO AVG report only all year
006Boron, total [as B]DAILY MX report only all year
006Zinc, total recoverableMO AVG report only all year
006Zinc, total recoverableDAILY MX report only all year
006Cadmium, total recoverableMO AVG report only all year
006Cadmium, total recoverableDAILY MX report only all year
006Lead, total recoverableMO AVG report only all year
006Lead, total recoverableDAILY MX report only all year
006Chromium, total recoverableMO AVG report only all year
006Chromium, total recoverableDAILY MX report only all year
006Molybdenum, total recoverableMO AVG report only all year
006Molybdenum, total recoverableDAILY MX report only all year
006Lithium, total [as Li]MO AVG report only all year
006Lithium, total [as Li]DAILY MX report only all year
006Chromium, hexavalent dissolved [as Cr]MO AVG report only all year
006Chromium, hexavalent dissolved [as Cr]DAILY MX report only all year
006Antimony, total recoverableMO AVG report only all year
006Antimony, total recoverableDAILY MX report only all year
006Flow, in conduit or thru treatment plantMO AVG report only all year
006Flow, in conduit or thru treatment plantDAILY MX report only all year
006Solids, total dissolvedMO AVG report only all year
006Solids, total dissolvedDAILY MX report only all year
006Mercury, total recoverableMO AVG report only Feb, Apr, Jun, Aug, Oct, Dec
006Mercury, total recoverableDAILY MX report only Feb, Apr, Jun, Aug, Oct, Dec
006Flow, totalMO TOTAL report only all year
101pHDAILY MN >= 6 SU all year
101pHDAILY MX <= 9 SU all year
101Solids, total suspendedMO AVG <= 23 mg/L all year
101Solids, total suspendedDAILY MX <= 74 mg/L all year
101Oil and grease, hexane extr methodMO AVG <= 8 mg/L all year
101Oil and grease, hexane extr methodDAILY MX <= 11 mg/L all year
101Nitrogen, Kjeldahl, total [as N]DAILY MX report only Jun, Dec
101Nitrogen, Kjeldahl, total [as N]DAILY MX report only Jun, Dec
101Nitrite + Nitrate total [as N]DAILY MX report only Jun, Dec
101Nitrite + Nitrate total [as N]DAILY MX report only Jun, Dec
101Phosphorus, total [as P]DAILY MX report only Jun, Dec
101Phosphorus, total [as P]DAILY MX report only Jun, Dec
101Flow, in conduit or thru treatment plantMO AVG report only all year
101Flow, in conduit or thru treatment plantDAILY MX report only all year
101BOD, carbonaceous [5 day, 20 C]DAILY MX report only Jun, Dec
101BOD, carbonaceous [5 day, 20 C]DAILY MX report only Jun, Dec
101Chemical Oxygen Demand [COD]DAILY MX report only Jun, Dec
101Chemical Oxygen Demand [COD]DAILY MX report only Jun, Dec
201pHDAILY MN >= 6 SU all year
201pHDAILY MX <= 9 SU all year
201Solids, total suspendedMO AVG <= 30 mg/L all year
201Solids, total suspendedDAILY MX <= 70 mg/L all year
201Oil and grease, hexane extr methodMO AVG <= 15 mg/L all year
201Oil and grease, hexane extr methodDAILY MX <= 20 mg/L all year
201Flow, in conduit or thru treatment plantMO AVG report only all year
201Flow, in conduit or thru treatment plantDAILY MX report only all year
401pHDAILY MN >= 6 SU all year
401pHDAILY MX <= 9 SU all year
401Solids, total suspendedMO AVG <= 30 mg/L all year
401Solids, total suspendedDAILY MX <= 100 mg/L all year
401Oil and grease, hexane extr methodMO AVG <= 15 mg/L all year
401Oil and grease, hexane extr methodDAILY MX <= 20 mg/L all year
401Iron, total recoverableMO AVG <= 1 mg/L all year
401Iron, total recoverableDAILY MX <= 1 mg/L all year
401Copper, total recoverableMO AVG <= 1 mg/L all year
401Copper, total recoverableDAILY MX <= 1 mg/L all year
401Flow, in conduit or thru treatment plantMO AVG report only all year
401Flow, in conduit or thru treatment plantDAILY MX report only all year

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