RIO RANCHO, CITY OF

NPDES permit NM0027987 · Major POTW · administratively continued, expires 2026-07-31 · 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.

This permit expired on 2026-07-31 and is administratively continued: its last limits keep applying until a new permit is issued, and EPA still expects the reports.

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

12values over a limit
0required values missing, on 0 form(s)
3of 55 forms filed late

Last period with anything received: 2026-07-31. Most often over: E. coli (8), Solids, total suspended (2), Chlorine, total residual (1).

Reporting

Reports are due about 15 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (90)

OutfallParameterStatisticLimitMonths
001BOD, 5-day, 20 deg. C30DA AVG <= 10 mg/L all year
001BOD, 5-day, 20 deg. C7 DA AVG <= 15 mg/L all year
001pHMINIMUM >= 6.6 SU all year
001pHMAXIMUM <= 9 SU all year
001Solids, total suspended30DA AVG <= 15 mg/L all year
001Solids, total suspended7 DA AVG <= 23 mg/L all year
001Oil & Grease30DA AVG <= 10 mg/L all year
001Oil & GreaseDAILY MX <= 15 mg/L all year
001Nitrogen, total [as N]DAILY MX report only all year
001Nitrogen, ammonia total [as N]DAILY MX <= 2.14 mg/L all year
001Phosphorus, total [as P]DAILY MX report only all year
001Chloride [as Cl]DAILY MX report only all year
001ChlorpyrifosDAILY MX report only all year
001BenzidineDAILY MX report only all year
001Polychlorinated biphenyls [PCBs]DAILY MX report only all year
001ParathionDAILY MX report only all year
001DiazinonDAILY MX report only all year
001GuthionDAILY MX report only all year
001HexachlorobenzeneDAILY MX report only all year
001MirexDAILY MX report only all year
001Flow, in conduit or thru treatment plant30DA AVG report only all year
001Flow, in conduit or thru treatment plant7 DA AVG report only all year
001Chlorine, total residualINST MAX <= 11 ug/L all year
001E. coli30DAVGEO <= 47 CFU/100mL all year
001E. coliDAILY MX <= 88 CFU/100mL all year
001Solids, total dissolved30DA AVG <= 1322 mg/L all year
001Solids, total dissolvedDAILY MX <= 1983 mg/L all year
001Mercury, total [as Hg]DAILY MX report only all year
001Alpha gross radioactivityDAILY MX report only all year
001BOD, 5-day, percent removalMO AV MN >= 85 % all year
001Solids, suspended percent removalMO AV MN >= 85 % all year
601BOD, 5-day, 20 deg. C30DA AVG <= 10 mg/L all year
601BOD, 5-day, 20 deg. C7 DA AVG <= 15 mg/L all year
601pHMINIMUM >= 6.6 SU all year
601pHMAXIMUM <= 9 SU all year
601Solids, total suspended30DA AVG <= 15 mg/L all year
601Solids, total suspended7 DA AVG <= 23 mg/L all year
601Oil & Grease30DA AVG <= 10 mg/L all year
601Oil & GreaseDAILY MX <= 15 mg/L all year
601Nitrogen, total [as N]DAILY MX report only all year
601Nitrogen, ammonia total [as N]DAILY MX <= 2.14 mg/L all year
601Phosphorus, total [as P]DAILY MX report only all year
601Chloride [as Cl]DAILY MX report only all year
601Polychlorinated biphenyls [PCBs]DAILY MX report only all year
601HexachlorobenzeneDAILY MX report only all year
601Flow, in conduit or thru treatment plant30DA AVG report only all year
601Flow, in conduit or thru treatment plant7 DA AVG report only all year
601Chlorine, total residualINST MAX <= 11 ug/L all year
601E. coli30DAVGEO <= 47 CFU/100mL all year
601E. coliDAILY MX <= 88 CFU/100mL all year
601Solids, total dissolved30DA AVG <= 1322 mg/L all year
601Solids, total dissolvedDAILY MX <= 1983 mg/L all year
601Mercury, total [as Hg]DAILY MX report only all year
601Alpha gross radioactivityDAILY MX report only all year
601BOD, 5-day, percent removalMO AV MN >= 85 % all year
601Solids, suspended percent removalMO AV MN >= 85 % all year
CC0BOD, 5-day, 20 deg. C30DA AVG <= 684 lb/d all year
CC0BOD, 5-day, 20 deg. C7 DA AVG <= 1026 lb/d all year
CC0Solids, total suspended30DA AVG <= 1026 lb/d all year
CC0Solids, total suspended7 DA AVG <= 1573 lb/d all year
CC0Oil & Grease30DA AVG <= 684 lb/d all year
CC0Oil & GreaseDAILY MX <= 1026 lb/d all year
CC0Nitrogen, ammonia total [as N]DAILY MX <= 146 lb/d all year
CC0E. coli30DAVGEO <= 9800 MCFU/d all year
CC0Solids, total dissolved30DA AVG <= 90409 lb/d all year
CC0Solids, total dissolvedDAILY MX <= 135613 lb/d all year
TX1Whole effluent toxicity - retest #1VALUE report only all year
TX1Whole effluent toxicity - retest #2VALUE report only all year
TX1WET, sublethal retest #1VALUE report only all year
TX1WET, sublethal retest #2VALUE report only all year
TX1Whole Effluent Toxicity - Retest #3VALUE report only all year
TX1Whole Effluent Toxicity, Sub-Lethal Retest #3VALUE report only all year
TX1Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulexVALUE report only all year
TX1LF Pass/Fail Static Renewal 48Hr Acute Pimephales promelasVALUE report only all year
TX1NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulexVALUE report only all year
TX1NOAEC Lethal Static Renewal 48Hr acute Pimephales promelasVALUE report only all year
TX1Coef Of Var Static Renewal 48Hr Acute D. pulexVALUE report only all year
TX1Coef Of Var Static Renewal 48Hr Acute Pimephales promelasVALUE report only all year
TX6Whole effluent toxicity - retest #1VALUE report only all year
TX6Whole effluent toxicity - retest #2VALUE report only all year
TX6WET, sublethal retest #1VALUE report only all year
TX6WET, sublethal retest #2VALUE report only all year
TX6Whole Effluent Toxicity - Retest #3VALUE report only all year
TX6Whole Effluent Toxicity, Sub-Lethal Retest #3VALUE report only all year
TX6Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulexVALUE report only all year
TX6LF Pass/Fail Static Renewal 48Hr Acute Pimephales promelasVALUE report only all year
TX6NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulexVALUE report only all year
TX6NOAEC Lethal Static Renewal 48Hr acute Pimephales promelasVALUE report only all year
TX6Coef Of Var Static Renewal 48Hr Acute D. pulexVALUE report only all year
TX6Coef Of Var Static Renewal 48Hr Acute Pimephales promelasVALUE report only all year

Built from EPA's ECHO bulk files. EPA's file, not the permit document, is the source: read your permit. Check a report before you file it · All states