PRASA ARECIBO RWWTP

NPDES permit PR0023710 · Major POTW · administratively continued, expires 2020-11-30 · 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 2020-11-30 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

26values over a limit
0required values missing, on 0 form(s)
1of 15 forms filed late

Last period with anything received: 2026-07-31. Most often over: Coliform, fecal - % samples exceeding limit (6), Coliform, fecal general (6), Enterococci - % of upper confidence limit (6).

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 (53)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. centigradeDAILY MX <= 32.2 deg C all year
001TurbidityDAILY MX <= 57 NTU all year
001Color [PT-CO units]DAILY MX report only all year
001Oxygen, dissolved [DO]INST MIN report only all year
001BOD, 5-day, 20 deg. CMO AVG <= 120 mg/L all year
001BOD, 5-day, 20 deg. CMO AVG <= 9085 kg/d all year
001BOD, 5-day, 20 deg. CMO AVG report only all year
001BOD, 5-day, 20 deg. CWKLY AVG report only all year
001BOD, 5-day, 20 deg. CMO AVG report only all year
001pHMINIMUM >= 6 SU all year
001pHMAXIMUM <= 9 SU all year
001Solids, total suspendedMO AVG <= 110 mg/L all year
001Solids, total suspendedMO AVG <= 8326 kg/d all year
001Solids, total suspendedMO AVG report only all year
001Solids, total suspendedDAILY MX report only all year
001Solids, total suspendedMO AVG report only all year
001Solids, settleableDAILY MX report only all year
001Oil & GreaseDAILY AV report only all year
001Oil & GreaseDAILY MX report only all year
001Nitrogen, total [as N]DAILY MX <= 39752 ug/L all year
001Nitrogen, Kjeldahl, total [as N]DAILY MX report only all year
001Copper, total [as Cu]DAILY MX <= 55.26 ug/L all year
001Thallium, total [as Tl]DAILY MX <= .49 ug/L all year
001Thallium, total [as Tl]DAILY MX <= 1.24 ug/L all year
001Nickel, total [as Ni]DAILY MX <= 9.48 ug/L all year
001Silver, total [as Ag]DAILY MX <= 6.61 ug/L all year
001Zinc, total [as Zn]DAILY MX <= 85.62 ug/L all year
0012-Methyl-4,6-dinitrophenolDAILY MX report only all year
001Coliform, fecal - % samples exceeding limit2A <= 20 % all year
0012-ChlorophenolDAILY MX report only all year
0012,4-DichlorophenolDAILY MX report only all year
0012,4,6-TrichlorophenolDAILY MX report only all year
001Surfactants [MBAS]DAILY MX <= 7969 ug/L all year
001PentachlorophenolDAILY MX report only all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantDAILY MX <= 20 MGD all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Chlorine, total residualDAILY MX <= 50 ug/L all year
001Cyanide, free availableDAILY MX <= 10.2 ug/L all year
001Sulfide-hydrogen sulfide [undissociated]DAILY MX <= 25 ug/L all year
001Sulfide-hydrogen sulfide [undissociated]DAILY MX <= 131 ug/L all year
001Enterococci - % of upper confidence limitGEO MEAN <= 75 % all year
001Whole Effluent Toxicity [WET] - Americamysis bahia (formerly Mysidopsis bahia)MINIMUM report only all year
001EnterococciGEO MEAN report only all year
001EnterococciGEO MEAN <= 2688 #/100mL all year
001Coliform, fecal generalGEO MEAN <= 200 #/100mL all year
001BOD, 5-day, percent removalMO AV MN >= 30 % all year
001Solids, suspended percent removalMO AV MN >= 50 % all year
001% Effect Static Chronic Arbacia punctulataMINIMUM report only all year
001NOAEL Static 48Hr Acute Cyprinodon variegatusMINIMUM report only all year
001NOEC Sub-Lethal Static Renewal 7 Day Chronic Cyprinodeon variegatusMINIMUM report only all year
001% Growth Reduction Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)MINIMUM 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