GUAM WATERWORKS AUTHORITY

NPDES permit GU0020087 · Major POTW · expired, expires 2024-12-31 · 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 2024-12-31 and is expired: 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

83values over a limit
32required values missing, on 8 form(s)
6of 34 forms filed late

Last period with anything received: 2026-06-30. Most often over: BOD, 5-day, 20 deg. C (21), Enterococci (20), Solids, total suspended (11).

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 (184)

OutfallParameterStatisticLimitMonths
002Temperature, water deg. centigradeMO AVG report only all year
002Temperature, water deg. centigradeDAILY MX report only all year
002BOD, 5-day, 20 deg. CMO AVG <= 30 mg/L all year
002BOD, 5-day, 20 deg. CMO AVG <= 97 mg/L all year
002BOD, 5-day, 20 deg. CHI WK AV <= 45 mg/L all year
002BOD, 5-day, 20 deg. CHI WK AV <= 140 mg/L all year
002BOD, 5-day, 20 deg. CMO AVG <= 3002 lb/d all year
002BOD, 5-day, 20 deg. CMO AVG <= 4911 lb/d all year
002BOD, 5-day, 20 deg. CHI WK AV <= 4504 lb/d all year
002BOD, 5-day, 20 deg. CHI WK AV <= 7055 lb/d all year
002pHMINIMUM >= 6.5 SU all year
002pHMAXIMUM <= 8.5 SU all year
002Solids, total suspendedMO AVG <= 30 mg/L all year
002Solids, total suspendedMO AVG <= 64 mg/L all year
002Solids, total suspendedHI WK AV <= 45 mg/L all year
002Solids, total suspendedHI WK AV <= 125 mg/L all year
002Solids, total suspendedMO AVG <= 3002 lb/d all year
002Solids, total suspendedMO AVG <= 2827 lb/d all year
002Solids, total suspendedHI WK AV <= 4504 lb/d all year
002Solids, total suspendedHI WK AV <= 5500 lb/d all year
002Nitrogen, nitrate total [as N]MO AVG <= 30.2 mg/L all year
002Nitrite + Nitrate total [as N]DAILY MX report only all year
002Nitrite + Nitrate total [as N]DAILY MX report only all year
002Phosphate, ortho [as PO4]MO AVG <= 8 mg/L all year
002Phosphate, ortho [as PO4]DAILY MX report only all year
002Phosphate, ortho [as PO4]DAILY MX report only all year
002Silver total recoverableDAILY MX <= 2.3 ug/L all year
002Zinc, total recoverableDAILY MX report only all year
002Zinc, total recoverableDAILY MX report only all year
002Copper, total recoverableMO AVG <= 3.1 ug/L all year
002Copper, total recoverableDAILY MX <= 4.8 ug/L all year
002Copper, total recoverableDAILY MX report only all year
002Copper, total recoverableDAILY MX report only all year
002Flow, in conduit or thru treatment plantMO AVG <= 12 MGD all year
002Flow, in conduit or thru treatment plantDAILY MX report only all year
002Chlorine, total residualMO AVG <= 1.5 mg/L all year
002Chlorine, total residualDAILY MX <= 2.46 mg/L all year
002EnterococciMO AVG <= 35 CFU/100mL all year
002EnterococciDAILY MX <= 104 CFU/100mL all year
002Ammonia [as N] + unionized ammoniaMO AVG report only all year
002Ammonia [as N] + unionized ammoniaDAILY MX report only all year
002Oil & grease, total recoverableMO AVG <= 10 mg/L all year
002Oil & grease, total recoverableDAILY MX <= 15 mg/L all year
002BOD, 5-day, percent removalMO AV MN >= 85 % all year
002BOD, 5-day, percent removalMO AV MN >= 33 % all year
002Solids, suspended percent removalMO AV MN >= 85 % all year
002Solids, suspended percent removalMO AV MN >= 50 % all year
002Pass/Fail Static 20 Minute Fertilization Chronic Strongylocentrotus purpuratusMO AVG report only all year
002Pass/Fail Static 20 Minute Fertilization Chronic Strongylocentrotus purpuratusDAILY MX report only all year
002YCyanide, total [as CN]DAILY MX report only all year
002YAsbestosDAILY MX report only all year
002YArsenic, total recoverableDAILY MX report only all year
002YSelenium, total recoverableDAILY MX report only all year
002YThallium, total recoverableDAILY MX report only all year
002YBeryllium, total recoverable [as Be]DAILY MX report only all year
002YChromium, hexavalent [as Cr]DAILY MX report only all year
002YChromium, trivalent [as Cr]DAILY MX report only all year
002YNickel, total recoverableDAILY MX report only all year
002YSilver total recoverableDAILY MX report only all year
002YZinc, total recoverableDAILY MX report only all year
002YCadmium, total recoverableDAILY MX report only all year
002YLead, total recoverableDAILY MX report only all year
002YCopper, total recoverableDAILY MX report only all year
002YAntimony, total recoverableDAILY MX report only all year
002Y2-Methyl-4,6-dinitrophenolDAILY MX report only all year
002YDichlorobromomethaneDAILY MX report only all year
002YCarbon tetrachlorideDAILY MX report only all year
002Y1,2-DichloroethaneDAILY MX report only all year
002YBromoformDAILY MX report only all year
002YDibromochloromethaneDAILY MX report only all year
002YChloroformDAILY MX report only all year
002YTolueneDAILY MX report only all year
002YBenzeneDAILY MX report only all year
002Y.delta.-BHCDAILY MX report only all year
002YAcenaphthyleneDAILY MX report only all year
002YAcenaphtheneDAILY MX report only all year
002YAcroleinDAILY MX report only all year
002YAcrylonitrileDAILY MX report only all year
002YAnthraceneDAILY MX report only all year
002YBenzo[b]fluorantheneDAILY MX report only all year
002YBenzo[k]fluorantheneDAILY MX report only all year
002YBenzo[a]pyreneDAILY MX report only all year
002YBis[2-chloroethyl] etherDAILY MX report only all year
002YBis[2-chloroethoxy]methaneDAILY MX report only all year
002YBis[2-chloroisopropyl] etherDAILY MX report only all year
002YButyl benzyl phthalateDAILY MX report only all year
002YChlorobenzeneDAILY MX report only all year
002YChryseneDAILY MX report only all year
002YDiethyl phthalateDAILY MX report only all year
002YDimethyl phthalateDAILY MX report only all year
002Y1,2-DiphenylhydrazineDAILY MX report only all year
002YEndosulfan sulfateDAILY MX report only all year
002Y.beta.-EndosulfanDAILY MX report only all year
002Y.alpha.-EndosulfanDAILY MX report only all year
002YEndrin aldehydeDAILY MX report only all year
002YEthylbenzeneDAILY MX report only all year
002YFluorantheneDAILY MX report only all year
002YFluoreneDAILY MX report only all year
002YHexachlorocyclopentadieneDAILY MX report only all year
002YHexachlorobutadieneDAILY MX report only all year
002YHexachloroethaneDAILY MX report only all year
002YIndeno[1,2,3-cd]pyreneDAILY MX report only all year
002YIsophoroneDAILY MX report only all year
002YMethyl bromide [Bromomethane]DAILY MX report only all year
002YMethyl chloride [Chloromethane]DAILY MX report only all year
002YMethylene chlorideDAILY MX report only all year
002YN-Nitrosodi-N-propylamineDAILY MX report only all year
002YN-NitrosodiphenylamineDAILY MX report only all year
002YN-Nitrosodimethylamine [NDMA]DAILY MX report only all year
002YNitrobenzeneDAILY MX report only all year
002YPhenanthreneDAILY MX report only all year
002YPyreneDAILY MX report only all year
002YTetrachloroethyleneDAILY MX report only all year
002Y1,1-DichloroethaneDAILY MX report only all year
002Y1,1-DichloroethyleneDAILY MX report only all year
002Y1,1,1-TrichloroethaneDAILY MX report only all year
002Y1,1,2-TrichloroethaneDAILY MX report only all year
002Y1,1,2,2-TetrachloroethaneDAILY MX report only all year
002YBenzo[ghi]peryleneDAILY MX report only all year
002YBenzo[a]anthraceneDAILY MX report only all year
002Y1,2-DichlorobenzeneDAILY MX report only all year
002Y1,2-DichloropropaneDAILY MX report only all year
002Ytrans-1,2-DichloroethyleneDAILY MX report only all year
002Y1,2,4-TrichlorobenzeneDAILY MX report only all year
002YDibenz[a,h]anthraceneDAILY MX report only all year
002Y1,3-DichlorobenzeneDAILY MX report only all year
002Y1,4-DichlorobenzeneDAILY MX report only all year
002Y2-Chloroethyl vinyl ether, [mixed]DAILY MX report only all year
002Y2-ChloronaphthaleneDAILY MX report only all year
002Y2-ChlorophenolDAILY MX report only all year
002Y2-NitrophenolDAILY MX report only all year
002YDi-n-octyl phthalateDAILY MX report only all year
002Y2,4-DichlorophenolDAILY MX report only all year
002Y2,4-DimethylphenolDAILY MX report only all year
002Y2,4-DinitrotolueneDAILY MX report only all year
002Y2,4-DinitrophenolDAILY MX report only all year
002Y2,4,6-TrichlorophenolDAILY MX report only all year
002Y2,6-DinitrotolueneDAILY MX report only all year
002Y3,3'-DichlorobenzidineDAILY MX report only all year
002Y4-Bromophenyl phenyl etherDAILY MX report only all year
002Y4-Chlorophenyl phenyl etherDAILY MX report only all year
002Y4-NitrophenolDAILY MX report only all year
002YPCB-1016DAILY MX report only all year
002Y2,3,7,8-Tetrachlorodibenzo-p-dioxinDAILY MX report only all year
002YPhenolDAILY MX report only all year
002YNaphthaleneDAILY MX report only all year
002YPentachlorophenolDAILY MX report only all year
002YDi[2-ethylhexyl] phthalate [DEHP]DAILY MX report only all year
002YDi-n-butyl phthalateDAILY MX report only all year
002YBenzidineDAILY MX report only all year
002YVinyl chlorideDAILY MX report only all year
002YTrichloroethyleneDAILY MX report only all year
002Y4,4'-DDTDAILY MX report only all year
002Y4,4'-DDDDAILY MX report only all year
002Y4,4'-DDEDAILY MX report only all year
002YAldrinDAILY MX report only all year
002Y.alpha.-BHCDAILY MX report only all year
002Y.beta.-BHCDAILY MX report only all year
002Y.gamma.-BHCDAILY MX report only all year
002YChlordane [tech mix. and metabolites]DAILY MX report only all year
002YDieldrinDAILY MX report only all year
002YEndrinDAILY MX report only all year
002YToxapheneDAILY MX report only all year
002YHeptachlorDAILY MX report only all year
002YHeptachlor epoxideDAILY MX report only all year
002YPCB-1221DAILY MX report only all year
002YPCB-1232DAILY MX report only all year
002YPCB-1242DAILY MX report only all year
002YPCB-1248DAILY MX report only all year
002YPCB-1254DAILY MX report only all year
002YPCB-1260DAILY MX report only all year
002YHexachlorobenzeneDAILY MX report only all year
002Y4-Chloro-3-methylphenolDAILY MX report only all year
002YMercury, total recoverableDAILY MX report only all year
002Y1,3-DichloropropeneDAILY MX report only all year
002YChloroethaneDAILY MX report only all year
INFBOD, 5-day, 20 deg. CMO AVG report only all year
INFBOD, 5-day, 20 deg. CHI WK AV report only all year
INFBOD, 5-day, 20 deg. CMO AVG report only all year
INFBOD, 5-day, 20 deg. CHI WK AV report only all year
INFSolids, total suspendedMO AVG report only all year
INFSolids, total suspendedHI WK AV report only all year
INFSolids, total suspendedMO AVG report only all year
INFSolids, total suspendedHI WK AV 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