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PRASA Maizales WTP

Water Supply, Naguabo, Puerto Rico. NPDES permit PR0026905, in force until Sep 30, 2030. Last 12 months: over a limit 16 times (last June 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (11 values), form Q quarterly (1 value)
Last report on file
September 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 0 of 13 reports late

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

All 16 values over a limit
Period endingParameterReportedLimitOver by
October 2025Lead, total [as Pb], daily maximum.64 ug/L≤ .5 ug/L28%
October 2025Phosphorus, total [as P], daily maximum1300 ug/L≤ 160 ug/L713%
October 2025Zinc, total [as Zn], daily maximum79.2 ug/L≤ 50.16 ug/L58%
November 2025Lead, total [as Pb], daily maximum1.49 ug/L≤ .5 ug/L198%
November 2025Zinc, total [as Zn], daily maximum54 ug/L≤ 50.16 ug/L8%
December 2025Zinc, total [as Zn], daily maximum79.1 ug/L≤ 50.16 ug/L58%
January 2026Lead, total [as Pb], daily maximum1.25 ug/L≤ .5 ug/L150%
January 2026Phosphorus, total [as P], daily maximum4240 ug/L≤ 160 ug/L2550%
February 2026Phosphorus, total [as P], daily maximum360 ug/L≤ 160 ug/L125%
March 2026Lead, total [as Pb], daily maximum1.51 ug/L≤ .5 ug/L202%
March 2026Phosphorus, total [as P], daily maximum5250 ug/L≤ 160 ug/L3181%
May 2026Lead, total [as Pb], daily maximum.83 ug/L≤ .5 ug/L66%
May 2026Phosphorus, total [as P], daily maximum2670 ug/L≤ 160 ug/L1569%
June 2026Lead, total [as Pb], daily maximum7.76 ug/L≤ .5 ug/L1452%
June 2026Phosphorus, total [as P], daily maximum950 ug/L≤ 160 ug/L494%
June 2026Temperature, water deg. centigrade, daily maximum31.9 deg C≤ 30 deg C6%

Limits in force (15)

ParameterStatisticLimitMonths
Temperature, water deg. centigradedaily maximum≤ 30 deg Call year
Turbiditydaily maximum≤ 50 NTUall year
Oxygen, dissolved [DO]minimum≥ 5 mg/Lall year
pHminimum≥ 6 SUall year
pHdaily maximum≤ 9 SUall year
Solids, settleabledaily maximumreport only (mL/L)all year
Phosphorus, total [as P]daily maximum≤ 160 ug/Lall year
Copper, total [as Cu]daily maximum≤ 3 ug/Lall year
Copper, total [as Cu]daily maximum≤ 76.56 ug/Lall year
Lead, total [as Pb]daily maximum≤ .5 ug/Lall year
Zinc, total [as Zn]daily maximum≤ 37.02 ug/Lall year
Zinc, total [as Zn]daily maximum≤ 50.16 ug/Lall year
Flow, in conduit or thru treatment plantdaily maximum≤ .0296 MGDall year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualdaily maximum≤ 11 ug/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/PR0026905 · MCP: https://passage-data.com/mcp