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Prasa Arecibo WTP

Water Supply, Arecibo, Puerto Rico. NPDES permit PR0024210 expired Aug 31, 2026; its limits still apply. Last 12 months: over a limit 4 times (last July 2026), 1 of 16 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (14 values), form Q quarterly, form Y yearly
Last report on file
August 2026
Oct 2024 – Sep 2025
2 values over a limit, 10 required values missing, 3 of 17 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingParameterReportedLimitOver by
December 2025BOD, 5-day, 20 deg. C, daily maximum> 226 mg/L≤ 59 mg/L—
December 2025pH, minimum5.69 SU≥ 6 SU—
January 2026BOD, 5-day, 20 deg. C, daily maximum137 mg/L≤ 59 mg/L132%
July 2026BOD, 5-day, 20 deg. C, daily maximum148 mg/L≤ 59 mg/L151%

Limits in force (31)

ParameterStatisticLimitMonths
Temperature, water deg. centigradedaily maximum≤ 30 deg Call year
Turbiditydaily maximum≤ 50 NTUall year
Turbiditydaily maximum≤ 4402 NTUall year
Color [PT-CO units]daily maximum≤ 15 col unit (pc)all year
Color [PT-CO units]daily maximum≤ 25 col unit (pc)all year
Oxygen, dissolved [DO]instantaneous minimum≥ 5 mg/Lall year
BOD, 5-day, 20 deg. Cdaily maximum≤ 5 mg/Lall year
BOD, 5-day, 20 deg. Cdaily maximum≤ 59 mg/Lall year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, settleabledaily maximumreport only (mL/L)all year
Oil & Greasedaily maximumreport only (mg/L)all year
Phosphorus, total [as P]daily maximum≤ 160 ug/Lall year
Phosphorus, total [as P]daily maximum≤ 5.1 mg/Lall year
Cyanide, total [as CN]daily maximum≤ 4 ug/Lall year
Sulfate, total [as SO4]daily maximumreport only (ug/L)all year
Arsenic, total [as As]daily maximum≤ 10 ug/Lall year
Chromium, hexavalent [as Cr]daily maximumreport only (ug/L)all year
Copper, total [as Cu]daily maximum≤ 9.33 ug/Lall year
Copper, total [as Cu]daily maximum≤ 400.6 ug/Lall year
Lead, total [as Pb]daily maximum≤ 3.18 ug/Lall year
Lead, total [as Pb]daily maximum≤ 74 ug/Lall year
Zinc, total [as Zn]daily maximum≤ 119.82 ug/Lall year
Zinc, total [as Zn]daily maximum≤ 344.82 ug/Lall year
Flow, in conduit or thru treatment plantdaily maximum≤ .26 MGDall year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualdaily maximum≤ 11 ug/Lall year
Whole Effluent Toxicity [WET] - P. promelasminimumreport only (%)all year
Whole Effluent Toxicity [WET] - D. magnaminimumreport only (%)all year
Solids, total dissolveddaily maximum≤ 500 mg/Lall year
Ammonia & ammonium- totaldaily maximumreport only (mg/L)all year

How strict are these limits?

Cited limits by parameter: we hold no rule of Puerto Rico's own; the federal ones.

Same industry: the 108 Water Supply permits in Puerto Rico.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/PR0024210 · MCP: https://passage-data.com/mcp