PRASA GUANICA WWTP
NPDES ID: PR0020486
X — SNC: Effluent violation (non-monthly average limit)
The facility discharged more of a pollutant than its permit allows, measured over a period other than a monthly average.
This quarter: 10 effluent violations.
Violations
May 31, 2026
Enterococci
1375% over limit
Discharged 1917 MPN/100mL against a permitted limit of 130 MPN/100mL (90TH %)
DMR, Limited - Numeric Violation
Cyanide, free available
60% over limit
Discharged 0.0016 mg/L against a permitted limit of 0.001 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Enterococci
3051% over limit
Discharged 1103 MPN/100mL against a permitted limit of 35 MPN/100mL (GEO MEAN)
DMR, Limited - Numeric Violation
April 30, 2026
Enterococci
1233% over limit
Discharged 1733 MPN/100mL against a permitted limit of 130 MPN/100mL (90TH %)
DMR, Limited - Numeric Violation
Enterococci
1746% over limit
Discharged 646 MPN/100mL against a permitted limit of 35 MPN/100mL (GEO MEAN)
DMR, Limited - Numeric Violation
Cyanide, free available
180% over limit
Discharged 0.0028 mg/L against a permitted limit of 0.001 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, total [as N]
45% over limit
Discharged 7.26000034 mg/L against a permitted limit of 5.00000024 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
March 31, 2026
Enterococci
1146% over limit
Discharged 436 MPN/100mL against a permitted limit of 35 MPN/100mL (GEO MEAN)
DMR, Limited - Numeric Violation
Enterococci
490% over limit
Discharged 767.3 MPN/100mL against a permitted limit of 130 MPN/100mL (90TH %)
DMR, Limited - Numeric Violation
February 28, 2026
Enterococci
1251% over limit
Discharged 473 MPN/100mL against a permitted limit of 35 MPN/100mL (GEO MEAN)
DMR, Limited - Numeric Violation
Enterococci
1008% over limit
Discharged 1441 MPN/100mL against a permitted limit of 130 MPN/100mL (90TH %)
DMR, Limited - Numeric Violation
Nitrogen, total [as N]
7% over limit
Discharged 5.36000025 mg/L against a permitted limit of 5.00000024 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, total [as N]
7% over limit
Discharged 5.36000025 mg/L against a permitted limit of 5.00000024 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, total [as N]
7% over limit
Discharged 5.36000025 mg/L against a permitted limit of 5.00000024 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, total [as N]
7% over limit
Discharged 5.36000025 mg/L against a permitted limit of 5.00000024 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, total [as N]
7% over limit
Discharged 5.36000025 mg/L against a permitted limit of 5.00000024 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
January 31, 2026
Nitrogen, total [as N]
70% over limit
Discharged 8.5100004 mg/L against a permitted limit of 5.00000024 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, total [as N]
70% over limit
Discharged 8.5100004 mg/L against a permitted limit of 5.00000024 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, total [as N]
70% over limit
Discharged 8.5100004 mg/L against a permitted limit of 5.00000024 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, total [as N]
70% over limit
Discharged 8.5100004 mg/L against a permitted limit of 5.00000024 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, total [as N]
70% over limit
Discharged 8.5100004 mg/L against a permitted limit of 5.00000024 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Enterococci
1240% over limit
Discharged 469 MPN/100mL against a permitted limit of 35 MPN/100mL (GEO MEAN)
DMR, Limited - Numeric Violation
Enterococci
1030% over limit
Discharged 1469 MPN/100mL against a permitted limit of 130 MPN/100mL (90TH %)
DMR, Limited - Numeric Violation
December 31, 2025
Nitrogen, total [as N]
78% over limit
Discharged 8.89000042 mg/L against a permitted limit of 5.00000024 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, total [as N]
78% over limit
Discharged 8.89000042 mg/L against a permitted limit of 5.00000024 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, total [as N]
78% over limit
Discharged 8.89000042 mg/L against a permitted limit of 5.00000024 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, total [as N]
78% over limit
Discharged 8.89000042 mg/L against a permitted limit of 5.00000024 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, total [as N]
78% over limit
Discharged 8.89000042 mg/L against a permitted limit of 5.00000024 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, suspended percent removal
27% over limit
Discharged 81 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Numeric Violation
Enterococci
883% over limit
Discharged 1278 MPN/100mL against a permitted limit of 130 MPN/100mL (90TH %)
DMR, Limited - Numeric Violation
Enterococci
537% over limit
Discharged 223 MPN/100mL against a permitted limit of 35 MPN/100mL (GEO MEAN)
DMR, Limited - Numeric Violation
November 30, 2025
Enterococci
154% over limit
Discharged 89 MPN/100mL against a permitted limit of 35 MPN/100mL (GEO MEAN)
DMR, Limited - Numeric Violation
BOD, 5-day, percent removal
67% over limit
Discharged 75 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Numeric Violation
Nitrogen, total [as N]
41% over limit
Discharged 7.05000033 mg/L against a permitted limit of 5.00000024 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Enterococci
186% over limit
Discharged 372.2 MPN/100mL against a permitted limit of 130 MPN/100mL (90TH %)
DMR, Limited - Numeric Violation
October 31, 2025
Nitrogen, total [as N]
3% over limit
Discharged 5.14000024 mg/L against a permitted limit of 5.00000024 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Enterococci
105% over limit
Discharged 267 MPN/100mL against a permitted limit of 130 MPN/100mL (90TH %)
DMR, Limited - Numeric Violation
Enterococci
134% over limit
Discharged 82 MPN/100mL against a permitted limit of 35 MPN/100mL (GEO MEAN)
DMR, Limited - Numeric Violation
September 30, 2025
Solids, suspended percent removal
13% over limit
Discharged 83 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Numeric Violation
Temperature, water deg. centigrade
1% over limit
Discharged 30.2 deg C against a permitted limit of 30 deg C (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, total [as N]
37% over limit
Discharged 6.84000032 mg/L against a permitted limit of 5.00000024 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Enterococci
146% over limit
Discharged 86 MPN/100mL against a permitted limit of 35 MPN/100mL (GEO MEAN)
DMR, Limited - Numeric Violation
BOD, 5-day, percent removal
7% over limit
Discharged 84 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Numeric Violation
August 31, 2025
Enterococci
480% over limit
Discharged 203 MPN/100mL against a permitted limit of 35 MPN/100mL (GEO MEAN)
DMR, Limited - Numeric Violation
Nitrogen, total [as N]
100% over limit
Discharged 9.99000047 mg/L against a permitted limit of 5.00000024 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Temperature, water deg. centigrade
3% over limit
Discharged 31 deg C against a permitted limit of 30 deg C (DAILY MX)
DMR, Limited - Numeric Violation
Enterococci
78% over limit
Discharged 231.6 MPN/100mL against a permitted limit of 130 MPN/100mL (90TH %)
DMR, Limited - Numeric Violation
July 31, 2025
Enterococci
380% over limit
Discharged 168 MPN/100mL against a permitted limit of 35 MPN/100mL (GEO MEAN)
DMR, Limited - Numeric Violation
Enterococci
540% over limit
Discharged 832.6 MPN/100mL against a permitted limit of 130 MPN/100mL (90TH %)
DMR, Limited - Numeric Violation
June 30, 2025
Solids, total suspended
1628% over limit
Discharged 4022 kg/d against a permitted limit of 232.7 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
4486% over limit
Discharged 16009 kg/d against a permitted limit of 349.1 kg/d (WKLY AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
4764% over limit
Discharged 16979 kg/d against a permitted limit of 349.1 kg/d (WKLY AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
1729% over limit
Discharged 4257 kg/d against a permitted limit of 232.7 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Enterococci
1329% over limit
Discharged 500 MPN/100mL against a permitted limit of 35 MPN/100mL (GEO MEAN)
DMR, Limited - Numeric Violation
Enterococci
1331% over limit
Discharged 1860 MPN/100mL against a permitted limit of 130 MPN/100mL (90TH %)
DMR, Limited - Numeric Violation
May 31, 2025
Enterococci
1926% over limit
Discharged 709 MPN/100mL against a permitted limit of 35 MPN/100mL (GEO MEAN)
DMR, Limited - Numeric Violation
Enterococci
1331% over limit
Discharged 1860 MPN/100mL against a permitted limit of 130 MPN/100mL (90TH %)
DMR, Limited - Numeric Violation
April 30, 2025
Solids, suspended percent removal
27% over limit
Discharged 81 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Numeric Violation
Enterococci
1266% over limit
Discharged 478 MPN/100mL against a permitted limit of 35 MPN/100mL (GEO MEAN)
DMR, Limited - Numeric Violation
Enterococci
1127% over limit
Discharged 1595 MPN/100mL against a permitted limit of 130 MPN/100mL (90TH %)
DMR, Limited - Numeric Violation
March 31, 2025
Enterococci
419% over limit
Discharged 674.8 MPN/100mL against a permitted limit of 130 MPN/100mL (90TH %)
DMR, Limited - Numeric Violation
Enterococci
551% over limit
Discharged 228 MPN/100mL against a permitted limit of 35 MPN/100mL (GEO MEAN)
DMR, Limited - Numeric Violation
February 28, 2025
Enterococci
154% over limit
Discharged 89 MPN/100mL against a permitted limit of 35 MPN/100mL (GEO MEAN)
DMR, Limited - Numeric Violation
Enterococci
68% over limit
Discharged 218.6 MPN/100mL against a permitted limit of 130 MPN/100mL (90TH %)
DMR, Limited - Numeric Violation
January 31, 2025
Enterococci
149% over limit
Discharged 87 MPN/100mL against a permitted limit of 35 MPN/100mL (GEO MEAN)
DMR, Limited - Numeric Violation
Enterococci
79% over limit
Discharged 232.1 MPN/100mL against a permitted limit of 130 MPN/100mL (90TH %)
DMR, Limited - Numeric Violation
December 31, 2024
Enterococci
63% over limit
Discharged 57 MPN/100mL against a permitted limit of 35 MPN/100mL (GEO MEAN)
DMR, Limited - Numeric Violation
Enterococci
79% over limit
Discharged 232.1 MPN/100mL against a permitted limit of 130 MPN/100mL (90TH %)
DMR, Limited - Numeric Violation
November 30, 2024
Enterococci
71% over limit
Discharged 221.9 MPN/100mL against a permitted limit of 130 MPN/100mL (90TH %)
DMR, Limited - Numeric Violation
Enterococci
86% over limit
Discharged 65 MPN/100mL against a permitted limit of 35 MPN/100mL (GEO MEAN)
DMR, Limited - Numeric Violation
October 31, 2024
pH
0% over limit
Discharged 7.18 SU against a permitted limit of 7.3 SU (MINIMUM)
DMR, Limited - Numeric Violation
August 31, 2024
Temperature, water deg. centigrade
2% over limit
Discharged 33 deg C against a permitted limit of 32.2 deg C (DAILY MX)
DMR, Limited - Numeric Violation
Enterococci
848% over limit
Discharged 1233 MPN/100mL against a permitted limit of 130 MPN/100mL (90TH %)
DMR, Limited - Numeric Violation
Enterococci
11% over limit
Discharged 39 MPN/100mL against a permitted limit of 35 MPN/100mL (GEO MEAN)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
August 1, 2026 (5 days ago)