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Prasa Miradero WTP

Water Supply, major discharger, Mayaguez, Puerto Rico. NPDES permit PR0023990, in force until Sep 30, 2030. Last 12 months: over a limit 8 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (12 values), form Q quarterly (2 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
9 values over a limit, 0 required values missing, 0 of 17 reports late

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

Period endingParameterReportedLimitOver by
October 2025Lead, total [as Pb], daily maximum6.66 ug/L≤ 2.4 ug/L178%
December 2025Ammonia & ammonium- total, daily maximum.28 mg/L≤ .25 mg/L12%
December 2025BOD, 5-day, 20 deg. C, daily maximum23.5 mg/L≤ 16 mg/L47%
March 2026Ammonia & ammonium- total, daily maximum.29 mg/L≤ .25 mg/L16%
March 2026Lead, total [as Pb], daily maximum61.58 ug/L≤ 2.4 ug/L2466%
April 2026Lead, total [as Pb], daily maximum17.79 ug/L≤ 2.4 ug/L641%
May 2026Lead, total [as Pb], daily maximum18.05 ug/L≤ 2.4 ug/L652%
August 2026Lead, total [as Pb], daily maximum33.45 ug/L≤ 2.4 ug/L1294%

Limits in force (20)

ParameterStatisticLimitMonths
Temperature, water deg. centigradedaily maximum≤ 30 deg Call year
Turbiditydaily maximum≤ 50 NTUall year
Color [PT-CO units]daily maximum≤ 15 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≤ 16 mg/Lall year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, settleabledaily maximumreport only (mL/L)all year
Phosphorus, total [as P]daily maximum≤ 160 ug/Lall year
Phosphorus, total [as P]daily maximumreport only (ug/L)all year
Copper, total [as Cu]daily maximum≤ 7.7 ug/Lall year
Copper, total [as Cu]daily maximum≤ 706 ug/Lall year
Lead, total [as Pb]daily maximum≤ 2.4 ug/Lall year
Flow, in conduit or thru treatment plantdaily maximum≤ 1.442 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
Ammonia & ammonium- totaldaily maximum≤ .25 mg/Lall 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/PR0023990 · MCP: https://passage-data.com/mcp