LOS ALAMOS NATIONAL LABORATORY

NPDES permit NM0028355 · Major FEDERAL · effective, expires 2028-10-31 · 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

6values over a limit
0required values missing, on 0 form(s)
0of 196 forms filed late

Last period with anything received: 2026-07-31. Most often over: Polychlorinated biphenyls [PCBs] (2), Chlorine, total residual (2), Whole Effluent Toxicity [WET] - C. dubia (1).

Reporting

Reports are due about 28 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (263)

OutfallParameterStatisticLimitMonths
001BOD, 5-day, 20 deg. CMO AVG <= 30 mg/L all year
001BOD, 5-day, 20 deg. CDAILY MX <= 45 mg/L all year
001BOD, 5-day, 20 deg. CMO AVG <= 73 lb/d all year
001BOD, 5-day, 20 deg. CDAILY MX <= 109 lb/d all year
001pHMINIMUM >= 6.6 SU all year
001pHMAXIMUM <= 8.8 SU all year
001Solids, total suspendedMO AVG <= 30 mg/L all year
001Solids, total suspendedDAILY MX <= 100 mg/L all year
001Solids, total suspendedMO AVG report only all year
001Solids, total suspendedDAILY MX report only all year
001Copper, total [as Cu]MO AVG <= .0087 mg/L all year
001Copper, total [as Cu]DAILY MX <= .0087 mg/L all year
001Thallium, total [as Tl]MO AVG <= .00047 mg/L all year
001Thallium, total [as Tl]DAILY MX <= .00047 mg/L all year
001Zinc, total [as Zn]MO AVG <= .126 mg/L all year
001Zinc, total [as Zn]DAILY MX <= .126 mg/L all year
001Aluminum, total recoverableMO AVG report only all year
001Aluminum, total recoverableDAILY MX report only all year
001Polychlorinated biphenyls [PCBs]MO AVG <= .00064 ug/L all year
001Polychlorinated biphenyls [PCBs]DAILY MX <= .00064 ug/L all year
001Polychlorinated biphenyls [PCBs]MO AVG report only all year
001Polychlorinated biphenyls [PCBs]DAILY MX 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 residualINST MAX <= .011 mg/L all year
001E. coliMOAV GEO <= 126 CFU/100mL all year
001E. coliDAILY MX <= 410 CFU/100mL all year
0016T3 TemperatureVALUE report only all year
0016T3 TemperatureVALUE report only all year
022pHMINIMUM >= 6 SU all year
022pHMAXIMUM <= 9 SU all year
022Solids, total suspendedMO AVG <= 30 mg/L all year
022Solids, total suspendedDAILY MX <= 100 mg/L all year
022Copper, total [as Cu]MO AVG report only all year
022Copper, total [as Cu]DAILY MX report only all year
022Polychlorinated biphenyls [PCBs]MO AVG <= .00064 ug/L all year
022Polychlorinated biphenyls [PCBs]DAILY MX <= .00064 ug/L all year
022Polychlorinated biphenyls [PCBs]MO AVG report only all year
022Polychlorinated biphenyls [PCBs]DAILY MX report only all year
022Flow, in conduit or thru treatment plantMO AVG report only all year
022Flow, in conduit or thru treatment plantDAILY MX report only all year
022Chlorine, total residualINST MAX <= .011 mg/L all year
022Alpha, gross adjustedMO AVG report only all year
022Alpha, gross adjustedDAILY MX report only all year
022Mercury, total [as Hg]MO AVG report only all year
022Mercury, total [as Hg]DAILY MX report only all year
027Temperature, water deg. centigradeMO AVG report only all year
027Temperature, water deg. centigradeDAILY MX report only all year
027pHMINIMUM >= 6.6 SU all year
027pHMAXIMUM <= 8.8 SU all year
027Solids, total suspendedMO AVG <= 30 mg/L all year
027Solids, total suspendedDAILY MX <= 100 mg/L all year
027Phosphorus, total [as P]MO AVG <= 20 mg/L all year
027Phosphorus, total [as P]DAILY MX <= 40 mg/L all year
027Copper, total [as Cu]MO AVG <= .0087 mg/L all year
027Copper, total [as Cu]DAILY MX <= .0087 mg/L all year
027Aluminum, total recoverableMO AVG report only all year
027Aluminum, total recoverableDAILY MX report only all year
027Polychlorinated biphenyls [PCBs]MO AVG <= .00064 ug/L all year
027Polychlorinated biphenyls [PCBs]DAILY MX <= .000642 ug/L all year
027Flow, in conduit or thru treatment plantMO AVG report only all year
027Flow, in conduit or thru treatment plantDAILY MX report only all year
027Chlorine, total residualINST MAX <= .011 mg/L all year
027E. coliMOAV GEO <= 548 CFU/100mL all year
027E. coliDAILY MX <= 2507 CFU/100mL all year
027Mercury, total [as Hg]MO AVG <= .126 mg/L all year
027Mercury, total [as Hg]DAILY MX <= .126 mg/L all year
048pHMINIMUM >= 6 SU all year
048pHMAXIMUM <= 9 SU all year
048Solids, total suspendedMO AVG <= 30 mg/L all year
048Solids, total suspendedDAILY MX <= 100 mg/L all year
048Phosphorus, total [as P]MO AVG <= 20 mg/L all year
048Phosphorus, total [as P]DAILY MX <= 40 mg/L all year
048Cyanide, total [as CN]MO AVG report only all year
048Cyanide, total [as CN]DAILY MX report only all year
048Chromium, hexavalent [as Cr]MO AVG <= .016 mg/L all year
048Chromium, hexavalent [as Cr]DAILY MX <= .016 mg/L all year
048Selenium, total [as Se]MO AVG report only all year
048Selenium, total [as Se]DAILY MX report only all year
048Polychlorinated biphenyls [PCBs]MO AVG <= .00064 ug/L all year
048Polychlorinated biphenyls [PCBs]DAILY MX <= .00064 ug/L all year
048Polychlorinated biphenyls [PCBs]MO AVG report only all year
048Polychlorinated biphenyls [PCBs]DAILY MX report only all year
048Flow, in conduit or thru treatment plantMO AVG report only all year
048Flow, in conduit or thru treatment plantDAILY MX report only all year
048Chlorine, total residualINST MAX <= .011 mg/L all year
048Alpha, gross adjustedMO AVG report only all year
048Alpha, gross adjustedDAILY MX report only all year
048Mercury, total [as Hg]MO AVG report only all year
048Mercury, total [as Hg]DAILY MX report only all year
051Oxygen demand, chem. [high level] [COD]MO AVG <= 125 mg/L all year
051Oxygen demand, chem. [high level] [COD]DAILY MX <= 125 mg/L all year
051pHMINIMUM >= 6 SU all year
051pHMAXIMUM <= 9 SU all year
051Solids, total suspendedMO AVG <= 30 mg/L all year
051Solids, total suspendedDAILY MX <= 45 mg/L all year
051Solids, total suspendedMO AVG <= 73 lb/d all year
051Solids, total suspendedDAILY MX <= 109 lb/d all year
051Hardness, total [as CaCO3]MO AV MN >= 50 mg/L all year
051Copper, total [as Cu]MO AVG <= .0105 mg/L all year
051Copper, total [as Cu]DAILY MX <= .0105 mg/L all year
051Thallium, total [as Tl]MO AVG report only all year
051Thallium, total [as Tl]DAILY MX report only all year
051Radium 226 + radium 228, totalMO AVG <= 30 pCi/L all year
051Radium 226 + radium 228, totalDAILY MX <= 30 pCi/L all year
051Flow, in conduit or thru treatment plantMO AVG report only all year
051Flow, in conduit or thru treatment plantDAILY MX report only all year
051Chlorine, total residualINST MAX <= .011 mg/L all year
051Perchlorate [ClO4]MO AVG report only all year
051Perchlorate [ClO4]DAILY MX report only all year
051Organics, total toxic [TTO]MO AVG <= 1 mg/L all year
051Organics, total toxic [TTO]DAILY MX <= 1 mg/L all year
051Alpha gross radioactivityMO AVG report only all year
051Alpha gross radioactivityDAILY MX report only all year
055Oxygen demand, chem. [high level] [COD]MO AVG <= 125 mg/L all year
055Oxygen demand, chem. [high level] [COD]DAILY MX <= 125 mg/L all year
055pHMINIMUM >= 6 SU all year
055pHMAXIMUM <= 9 SU all year
055Solids, total suspendedMO AVG <= 30 mg/L all year
055Solids, total suspendedDAILY MX <= 45 mg/L all year
055Oil & GreaseMO AVG <= 15 mg/L all year
055Oil & GreaseDAILY MX <= 15 mg/L all year
055Selenium, total recoverableMO AVG <= .005 mg/L all year
055Selenium, total recoverableDAILY MX <= .005 mg/L all year
055Copper, total [as Cu]MO AVG <= .0009 mg/L all year
055Copper, total [as Cu]DAILY MX <= .0009 mg/L all year
055Lead, total [as Pb]MO AVG <= .004 mg/L all year
055Lead, total [as Pb]DAILY MX <= .004 mg/L all year
055Zinc, total [as Zn]MO AVG <= .013 mg/L all year
055Zinc, total [as Zn]DAILY MX <= .013 mg/L all year
055Aluminum, total recoverableMO AVG <= .027 mg/L all year
055Aluminum, total recoverableDAILY MX <= .027 mg/L all year
055Flow, in conduit or thru treatment plantMO AVG report only all year
055Flow, in conduit or thru treatment plantDAILY MX report only all year
055Perchlorate [ClO4]MO AVG report only all year
055Perchlorate [ClO4]DAILY MX report only all year
055Organics, total toxic [TTO]MO AVG <= 1 mg/L all year
055Organics, total toxic [TTO]DAILY MX <= 1 mg/L all year
055Trinitrotoluene [TNT], totalMO AVG <= .02 mg/L all year
055Trinitrotoluene [TNT], totalDAILY MX report only all year
055RDX, totalMO AVG <= .2 mg/L all year
055RDX, totalDAILY MX <= .66 mg/L all year
113pHMINIMUM >= 6 SU all year
113pHMAXIMUM <= 9 SU all year
113Solids, total suspendedMO AVG <= 30 mg/L all year
113Solids, total suspendedDAILY MX <= 100 mg/L all year
113Phosphorus, total [as P]MO AVG <= 20 mg/L all year
113Phosphorus, total [as P]DAILY MX <= 40 mg/L all year
113Chromium, hexavalent [as Cr]MO AVG <= .016 mg/L all year
113Chromium, hexavalent [as Cr]DAILY MX <= .016 mg/L all year
113Aluminum, total recoverableMO AVG report only all year
113Aluminum, total recoverableDAILY MX report only all year
113Polychlorinated biphenyls [PCBs]MO AVG <= .00064 ug/L all year
113Polychlorinated biphenyls [PCBs]DAILY MX <= .00064 ug/L all year
113Polychlorinated biphenyls [PCBs]MO AVG report only all year
113Polychlorinated biphenyls [PCBs]DAILY MX report only all year
113Flow, in conduit or thru treatment plantMO AVG report only all year
113Flow, in conduit or thru treatment plantDAILY MX report only all year
113Chlorine, total residualINST MAX <= .011 mg/L all year
113Alpha, gross adjustedMO AVG report only all year
113Alpha, gross adjustedDAILY MX report only all year
113Mercury, total [as Hg]MO AVG report only all year
113Mercury, total [as Hg]DAILY MX report only all year
13SBOD, 5-day, 20 deg. CMO AVG <= 30 mg/L all year
13SBOD, 5-day, 20 deg. CDAILY MX <= 45 mg/L all year
13SBOD, 5-day, 20 deg. CMO AVG <= 73 lb/d all year
13SBOD, 5-day, 20 deg. CDAILY MX <= 109 lb/d all year
13SpHMINIMUM >= 6 SU all year
13SpHMAXIMUM <= 9 SU all year
13SSolids, total suspendedMO AVG <= 30 mg/L all year
13SSolids, total suspendedDAILY MX <= 45 mg/L all year
13SSolids, total suspendedMO AVG <= 73 lb/d all year
13SSolids, total suspendedDAILY MX <= 109 lb/d all year
13SThallium, total [as Tl]MO AVG <= .00047 mg/L all year
13SThallium, total [as Tl]DAILY MX <= .00047 mg/L all year
13SPolychlorinated biphenyls [PCBs]MO AVG <= .00064 ug/L all year
13SPolychlorinated biphenyls [PCBs]DAILY MX <= .00064 ug/L all year
13SPolychlorinated biphenyls [PCBs]MO AVG report only all year
13SPolychlorinated biphenyls [PCBs]DAILY MX report only all year
13SFlow, in conduit or thru treatment plantMO AVG report only all year
13SFlow, in conduit or thru treatment plantDAILY MX report only all year
13SChlorine, total residualINST MAX <= .011 mg/L all year
13SE. coliMOAV GEO <= 548 CFU/100mL all year
13SE. coliDAILY MX <= 2507 CFU/100mL all year
13SAlpha, gross adjustedMO AVG report only all year
13SAlpha, gross adjustedDAILY MX report only all year
160pHMINIMUM >= 6 SU all year
160pHMAXIMUM <= 9 SU all year
160Solids, total suspendedMO AVG <= 30 mg/L all year
160Solids, total suspendedDAILY MX <= 100 mg/L all year
160Phosphorus, total [as P]MO AVG <= 20 mg/L all year
160Phosphorus, total [as P]DAILY MX <= 40 mg/L all year
160Thallium, total [as Tl]MO AVG <= .00047 mg/L all year
160Thallium, total [as Tl]DAILY MX <= .00047 mg/L all year
160Polychlorinated biphenyls [PCBs]MO AVG <= .00064 ug/L all year
160Polychlorinated biphenyls [PCBs]DAILY MX <= .00064 ug/L all year
160Polychlorinated biphenyls [PCBs]MO AVG report only all year
160Polychlorinated biphenyls [PCBs]DAILY MX report only all year
160Flow, in conduit or thru treatment plantMO AVG report only all year
160Flow, in conduit or thru treatment plantDAILY MX report only all year
160Chlorine, total residualINST MAX <= .011 mg/L all year
160Alpha, gross adjustedMO AVG report only all year
160Alpha, gross adjustedDAILY MX report only all year
181pHMINIMUM >= 6 SU all year
181pHMAXIMUM <= 9 SU all year
181Solids, total suspendedMO AVG <= 30 mg/L all year
181Solids, total suspendedDAILY MX <= 100 mg/L all year
181Phosphorus, total [as P]MO AVG <= 20 mg/L all year
181Phosphorus, total [as P]DAILY MX <= 40 mg/L all year
181Copper, total [as Cu]MO AVG report only all year
181Copper, total [as Cu]DAILY MX report only all year
181Polychlorinated biphenyls [PCBs]MO AVG <= .00064 ug/L all year
181Polychlorinated biphenyls [PCBs]DAILY MX <= .00064 ug/L all year
181Polychlorinated biphenyls [PCBs]MO AVG report only all year
181Polychlorinated biphenyls [PCBs]DAILY MX report only all year
181Flow, in conduit or thru treatment plantMO AVG report only all year
181Flow, in conduit or thru treatment plantDAILY MX report only all year
181Chlorine, total residualINST MAX <= .011 mg/L all year
181Alpha, gross adjustedMO AVG report only all year
181Alpha, gross adjustedDAILY MX report only all year
199Temperature, water deg. centigradeMO AVG report only all year
199Temperature, water deg. centigradeDAILY MX report only all year
199pHMINIMUM >= 6.6 SU all year
199pHMAXIMUM <= 8.8 SU all year
199Solids, total suspendedMO AVG <= 30 mg/L all year
199Solids, total suspendedDAILY MX <= 100 mg/L all year
199Phosphorus, total [as P]MO AVG <= 20 mg/L all year
199Phosphorus, total [as P]DAILY MX <= 40 mg/L all year
199Copper, total [as Cu]MO AVG report only all year
199Copper, total [as Cu]DAILY MX report only all year
199Thallium, total [as Tl]MO AVG <= .00047 mg/L all year
199Thallium, total [as Tl]DAILY MX <= .00047 mg/L all year
199Polychlorinated biphenyls [PCBs]MO AVG <= .00064 ug/L all year
199Polychlorinated biphenyls [PCBs]DAILY MX <= .00064 ug/L all year
199Polychlorinated biphenyls [PCBs]MO AVG report only all year
199Polychlorinated biphenyls [PCBs]DAILY MX report only all year
199Flow, in conduit or thru treatment plantMO AVG report only all year
199Flow, in conduit or thru treatment plantDAILY MX report only all year
199Chlorine, total residualINST MAX <= .011 mg/L all year
T051Whole effluent toxicity - retest #1VALUE report only all year
T051Whole effluent toxicity - retest #2VALUE report only all year
T051Whole Effluent Toxicity [WET] - D. pulexMN VALUE >= 100 % all year
T051Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulexVALUE report only all year
T051NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulexVALUE report only all year
T051Coef Of Var Static Renewal 48Hr Acute D. pulexVALUE report only all year
TX1Whole effluent toxicity - retest #1VALUE report only all year
TX1Whole effluent toxicity - retest #2VALUE report only all year
TX1Whole Effluent Toxicity - Retest #3VALUE report only all year
TX1Whole Effluent Toxicity [WET] - C. dubiaMN VALUE >= 100 % all year
TX1Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubiaVALUE report only all year
TX1Pass/Fail Static Renewal 7Day Chronic Pimephales promelasVALUE report only all year
TX1Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubiaVALUE report only all year
TX1Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelasVALUE report only all year
TX1NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiaVALUE report only all year
TX1NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelasVALUE report only all year
TX1NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiaVALUE report only all year
TX1NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelasVALUE report only all year
TX1Coef Of Var Static Renewal 7Day Chronic Ceriodaphnia dubiaVALUE report only all year
TX1Coef Of Var Static Renewal 7Day Chronic Pimephales promelasVALUE report only all year
TX1LOEC Lethal Survival Static Renewal 7 Day Chronic Ceriodaphnia dubiaVALUE report only all year
TX1LOEC Lethal Survival Static Renewal 7 Day Chronic Pimephales promelasVALUE report only all year
TX1LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Ceriodaphnia dubiaVALUE report only all year
TX1LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Pimephales promelasVALUE report only all year

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