GUAM WATERWORKS AUTHORITY

NPDES permit GU0020222 · 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

6values over a limit
56required values missing, on 8 form(s)
6of 34 forms filed late

Last period with anything received: 2026-06-30. Most often over: Flow, in conduit or thru treatment plant (4), Dieldrin (1), Solids, suspended percent removal (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 (193)

OutfallParameterStatisticLimitMonths
003Temperature, water deg. centigradeMO AVG report only all year
003Temperature, water deg. centigradeDAILY MX report only all year
003BOD, 5-day, 20 deg. CMO AVG <= 30 mg/L all year
003BOD, 5-day, 20 deg. CHI WK AV <= 45 mg/L all year
003BOD, 5-day, 20 deg. CMO AVG <= 400 lb/d all year
003BOD, 5-day, 20 deg. CHI WK AV <= 600 lb/d all year
003pHMINIMUM >= 6.5 SU all year
003pHMAXIMUM <= 8.5 SU all year
003Solids, total suspendedMO AVG <= 30 mg/L all year
003Solids, total suspendedHI WK AV <= 45 mg/L all year
003Solids, total suspendedMO AVG <= 400 lb/d all year
003Solids, total suspendedHI WK AV <= 600 lb/d all year
003Nitrogen, nitrate total [as N]MO AVG <= 28.5 mg/L all year
003Nitrogen, nitrate total [as N]DAILY MX report only all year
003Nitrite + Nitrate total [as N]DAILY MX report only all year
003Nitrite + Nitrate total [as N]DAILY MX report only all year
003Phosphate, ortho [as PO4]MO AVG <= 6.3 mg/L all year
003Phosphate, ortho [as PO4]DAILY MX report only all year
003Phosphate, ortho [as PO4]DAILY MX report only all year
003Phosphate, ortho [as PO4]DAILY MX report only all year
003Arsenic, total recoverableMO AVG <= 36 ug/L all year
003Arsenic, total recoverableDAILY MX <= 69 ug/L all year
003Arsenic, total recoverableDAILY MX report only all year
003Arsenic, total recoverableDAILY MX report only all year
003Nickel, total recoverableMO AVG <= 1284 ug/L all year
003Nickel, total recoverableDAILY MX <= 3378 ug/L all year
003Nickel, total recoverableDAILY MX report only all year
003Nickel, total recoverableDAILY MX report only all year
003Zinc, total recoverableMO AVG <= 45.8 ug/L all year
003Zinc, total recoverableDAILY MX <= 95 ug/L all year
003Zinc, total recoverableDAILY MX report only all year
003Zinc, total recoverableDAILY MX report only all year
003Aluminum, total recoverableDAILY MX <= 8457 ug/L all year
003Aluminum, total recoverableDAILY MX report only all year
003Aluminum, total recoverableDAILY MX report only all year
003Copper, total recoverableDAILY MX <= 197 ug/L all year
003Copper, total recoverableDAILY MX report only all year
003Copper, total recoverableDAILY MX report only all year
003DieldrinMO AVG <= .00014 ug/L all year
003DieldrinDAILY MX <= .71 ug/L all year
003Flow, in conduit or thru treatment plantMO AVG <= 1.6 MGD all year
003Flow, in conduit or thru treatment plantDAILY MX report only all year
003Chlorine, total residualMO AVG report only all year
003Chlorine, total residualDAILY MX report only all year
003ChlordaneMO AVG <= .0022 ug/L all year
003ChlordaneDAILY MX <= .09 ug/L all year
003EnterococciMO AVG <= 35 CFU/100mL all year
003EnterococciDAILY MX <= 104 CFU/100mL all year
003Ammonia [as N] + unionized ammoniaMO AVG report only all year
003Ammonia [as N] + unionized ammoniaDAILY MX report only all year
003Oil & grease, total recoverableMO AVG <= 10 mg/L all year
003Oil & grease, total recoverableDAILY MX <= 15 mg/L all year
003BOD, 5-day, percent removalMO AV MN >= 85 % all year
003Solids, suspended percent removalMO AV MN >= 85 % all year
003Pass/Fail Static 20 Minute Fertilization Chronic Strongylocentrotus purpuratusMO AVG report only all year
003Pass/Fail Static 20 Minute Fertilization Chronic Strongylocentrotus purpuratusDAILY MX report only all year
003YCyanide, total [as CN]DAILY MX report only all year
003YAsbestosDAILY MX report only all year
003YArsenic, total recoverableDAILY MX report only all year
003YSelenium, total recoverableDAILY MX report only all year
003YThallium, total recoverableDAILY MX report only all year
003YBeryllium, total recoverable [as Be]DAILY MX report only all year
003YChromium, hexavalent [as Cr]DAILY MX report only all year
003YChromium, trivalent [as Cr]DAILY MX report only all year
003YNickel, total recoverableDAILY MX report only all year
003YSilver total recoverableDAILY MX report only all year
003YZinc, total recoverableDAILY MX report only all year
003YCadmium, total recoverableDAILY MX report only all year
003YLead, total recoverableDAILY MX report only all year
003YCopper, total recoverableDAILY MX report only all year
003YAntimony, total recoverableDAILY MX report only all year
003Y2-Methyl-4,6-dinitrophenolDAILY MX report only all year
003YDichlorobromomethaneDAILY MX report only all year
003YCarbon tetrachlorideDAILY MX report only all year
003Y1,2-DichloroethaneDAILY MX report only all year
003YBromoformDAILY MX report only all year
003YDibromochloromethaneDAILY MX report only all year
003YChloroformDAILY MX report only all year
003YTolueneDAILY MX report only all year
003YBenzeneDAILY MX report only all year
003Y.delta.-BHCDAILY MX report only all year
003YAcenaphthyleneDAILY MX report only all year
003YAcenaphtheneDAILY MX report only all year
003YAcroleinDAILY MX report only all year
003YAcrylonitrileDAILY MX report only all year
003YAnthraceneDAILY MX report only all year
003YBenzo[b]fluorantheneDAILY MX report only all year
003YBenzo[k]fluorantheneDAILY MX report only all year
003YBenzo[a]pyreneDAILY MX report only all year
003YBis[2-chloroethyl] etherDAILY MX report only all year
003YBis[2-chloroethoxy]methaneDAILY MX report only all year
003YBis[2-chloroisopropyl] etherDAILY MX report only all year
003YButyl benzyl phthalateDAILY MX report only all year
003YChlorobenzeneDAILY MX report only all year
003YChryseneDAILY MX report only all year
003YDiethyl phthalateDAILY MX report only all year
003YDimethyl phthalateDAILY MX report only all year
003Y1,2-DiphenylhydrazineDAILY MX report only all year
003YEndosulfan sulfateDAILY MX report only all year
003Y.beta.-EndosulfanDAILY MX report only all year
003Y.alpha.-EndosulfanDAILY MX report only all year
003YEndrin aldehydeDAILY MX report only all year
003YEthylbenzeneDAILY MX report only all year
003YFluorantheneDAILY MX report only all year
003YFluoreneDAILY MX report only all year
003YHexachlorocyclopentadieneDAILY MX report only all year
003YHexachlorobutadieneDAILY MX report only all year
003YHexachloroethaneDAILY MX report only all year
003YIndeno[1,2,3-cd]pyreneDAILY MX report only all year
003YIsophoroneDAILY MX report only all year
003YMethyl bromide [Bromomethane]DAILY MX report only all year
003YMethyl chloride [Chloromethane]DAILY MX report only all year
003YMethylene chlorideDAILY MX report only all year
003YN-Nitrosodi-N-propylamineDAILY MX report only all year
003YN-NitrosodiphenylamineDAILY MX report only all year
003YN-Nitrosodimethylamine [NDMA]DAILY MX report only all year
003YNitrobenzeneDAILY MX report only all year
003YPhenanthreneDAILY MX report only all year
003YPyreneDAILY MX report only all year
003YTetrachloroethyleneDAILY MX report only all year
003Y1,1-DichloroethaneDAILY MX report only all year
003Y1,1-DichloroethyleneDAILY MX report only all year
003Y1,1,1-TrichloroethaneDAILY MX report only all year
003Y1,1,2-TrichloroethaneDAILY MX report only all year
003Y1,1,2,2-TetrachloroethaneDAILY MX report only all year
003YBenzo[ghi]peryleneDAILY MX report only all year
003YBenzo[a]anthraceneDAILY MX report only all year
003Y1,2-DichlorobenzeneDAILY MX report only all year
003Y1,2-DichloropropaneDAILY MX report only all year
003Ytrans-1,2-DichloroethyleneDAILY MX report only all year
003Y1,2,4-TrichlorobenzeneDAILY MX report only all year
003YDibenz[a,h]anthraceneDAILY MX report only all year
003Y1,3-DichlorobenzeneDAILY MX report only all year
003Y1,4-DichlorobenzeneDAILY MX report only all year
003Y2-Chloroethyl vinyl ether, [mixed]DAILY MX report only all year
003Y2-ChloronaphthaleneDAILY MX report only all year
003Y2-ChlorophenolDAILY MX report only all year
003Y2-NitrophenolDAILY MX report only all year
003YDi-n-octyl phthalateDAILY MX report only all year
003Y2,4-DichlorophenolDAILY MX report only all year
003Y2,4-DimethylphenolDAILY MX report only all year
003Y2,4-DinitrotolueneDAILY MX report only all year
003Y2,4-DinitrophenolDAILY MX report only all year
003Y2,4,6-TrichlorophenolDAILY MX report only all year
003Y2,6-DinitrotolueneDAILY MX report only all year
003Y3,3'-DichlorobenzidineDAILY MX report only all year
003Y4-Bromophenyl phenyl etherDAILY MX report only all year
003Y4-Chlorophenyl phenyl etherDAILY MX report only all year
003Y4-NitrophenolDAILY MX report only all year
003YPCB-1016DAILY MX report only all year
003Y2,3,7,8-Tetrachlorodibenzo-p-dioxinDAILY MX report only all year
003YPhenolDAILY MX report only all year
003YNaphthaleneDAILY MX report only all year
003YPentachlorophenolDAILY MX report only all year
003YDi[2-ethylhexyl] phthalate [DEHP]DAILY MX report only all year
003YDi-n-butyl phthalateDAILY MX report only all year
003YBenzidineDAILY MX report only all year
003YVinyl chlorideDAILY MX report only all year
003YTrichloroethyleneDAILY MX report only all year
003Y4,4'-DDTDAILY MX report only all year
003Y4,4'-DDDDAILY MX report only all year
003Y4,4'-DDEDAILY MX report only all year
003YAldrinDAILY MX report only all year
003Y.alpha.-BHCDAILY MX report only all year
003Y.beta.-BHCDAILY MX report only all year
003Y.gamma.-BHCDAILY MX report only all year
003YChlordane [tech mix. and metabolites]DAILY MX report only all year
003YDieldrinDAILY MX report only all year
003YEndrinDAILY MX report only all year
003YToxapheneDAILY MX report only all year
003YHeptachlorDAILY MX report only all year
003YHeptachlor epoxideDAILY MX report only all year
003YPCB-1221DAILY MX report only all year
003YPCB-1232DAILY MX report only all year
003YPCB-1242DAILY MX report only all year
003YPCB-1248DAILY MX report only all year
003YPCB-1254DAILY MX report only all year
003YPCB-1260DAILY MX report only all year
003YHexachlorobenzeneDAILY MX report only all year
003Y4-Chloro-3-methylphenolDAILY MX report only all year
003YMercury, total recoverableDAILY MX report only all year
003Y1,3-DichloropropeneDAILY MX report only all year
003YChloroethaneDAILY 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
INFFlow, in conduit or thru treatment plantMO AVG report only all year
INFFlow, in conduit or thru treatment plantDAILY MX 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