Cienega

Published drinking-water records and contacts for Cienega. System PR0003862. Review sources and dates; not a real-time water assessment.

System ID: PR0003862
State or territory: PR
Published population served: 3952
System type (source code): CWS

Published records and dates

PFAS / lithium (EPA UCMR 5): 120 — 2025-02-18 – 2025-08-19
Lead and copper monitoring summaries: 5 — 2010-01-01 – 2016-12-31

Missing records here do not mean the provider did not test. Published records are not a real-time assessment of your tap water.

Published testing results

Selected recent records are shown below. Different sampling locations and dates are not interchangeable. These excerpts are not a complete testing history.

“<” means below the stated reporting limit, not zero. A reported measurement alone is not a safety verdict. Read an example

EPA UCMR 5 — most recent imported sample per substance
Substance	Published result	Reporting limit	Sample date	Sampling location
11Cl-PF3OUdS	< 0.005 µg/L	0.005 µg/L	2025-08-19	CIENEGA / 38620004
4:2 FTS	< 0.003 µg/L	0.003 µg/L	2025-08-19	CIENEGA / 38620004
6:2 FTS	< 0.005 µg/L	0.005 µg/L	2025-08-19	CIENEGA / 38620004
8:2 FTS	< 0.005 µg/L	0.005 µg/L	2025-08-19	CIENEGA / 38620004
9Cl-PF3ONS	< 0.002 µg/L	0.002 µg/L	2025-08-19	CIENEGA / 38620054
ADONA	< 0.003 µg/L	0.003 µg/L	2025-08-19	CIENEGA / 38620054
HFPO-DA	< 0.005 µg/L	0.005 µg/L	2025-08-19	CIENEGA / 38620004
NEtFOSAA	< 0.005 µg/L	0.005 µg/L	2025-08-19	CIENEGA / 38620054
NFDHA	< 0.02 µg/L	0.02 µg/L	2025-08-19	CIENEGA / 38620004
NMeFOSAA	< 0.006 µg/L	0.006 µg/L	2025-08-19	CIENEGA / 38620004
PFBA	< 0.005 µg/L	0.005 µg/L	2025-08-19	CIENEGA / 38620054
PFBS	< 0.003 µg/L	0.003 µg/L	2025-08-19	CIENEGA / 38620004
PFDA	< 0.003 µg/L	0.003 µg/L	2025-08-19	CIENEGA / 38620054
PFDoA	< 0.003 µg/L	0.003 µg/L	2025-08-19	CIENEGA / 38620004
PFEESA	< 0.003 µg/L	0.003 µg/L	2025-08-19	CIENEGA / 38620004
PFHpA	< 0.003 µg/L	0.003 µg/L	2025-08-19	CIENEGA / 38620054
PFHpS	< 0.003 µg/L	0.003 µg/L	2025-08-19	CIENEGA / 38620004
PFHxA	< 0.003 µg/L	0.003 µg/L	2025-08-19	CIENEGA / 38620004
PFHxS	< 0.003 µg/L	0.003 µg/L	2025-08-19	CIENEGA / 38620004
PFMBA	< 0.003 µg/L	0.003 µg/L	2025-08-19	CIENEGA / 38620054
PFMPA	< 0.004 µg/L	0.004 µg/L	2025-08-19	CIENEGA / 38620004
PFNA	< 0.004 µg/L	0.004 µg/L	2025-08-19	CIENEGA / 38620054
PFOA	< 0.004 µg/L	0.004 µg/L	2025-08-19	CIENEGA / 38620004
PFOS	< 0.004 µg/L	0.004 µg/L	2025-08-19	CIENEGA / 38620004
PFPeA	< 0.003 µg/L	0.003 µg/L	2025-08-19	CIENEGA / 38620054
PFPeS	< 0.004 µg/L	0.004 µg/L	2025-08-19	CIENEGA / 38620004
PFTA	< 0.008 µg/L	0.008 µg/L	2025-08-19	CIENEGA / 38620004
PFTrDA	< 0.007 µg/L	0.007 µg/L	2025-08-19	CIENEGA / 38620004
PFUnA	< 0.002 µg/L	0.002 µg/L	2025-08-19	CIENEGA / 38620054
lithium	< 9 µg/L	9 µg/L	2025-08-19	CIENEGA / 38620054

Download all EPA UCMR 5 records (CSV)

Lead and copper: 90th-percentile summaries

These describe a monitoring period across sampled locations, not the result at your home. How to read the 90th percentile

Eight most recent imported monitoring summaries
Substance	Published 90th percentile	Monitoring period	Source quarter
Lead (PB90)	0.006 mg/L	2016-07-01 – 2016-12-31	2026Q3
Lead (PB90)	0.006 mg/L	2015-07-01 – 2015-12-31	2026Q3
Lead (PB90)	0.006 mg/L	2015-01-01 – 2015-06-30	2026Q3
Lead (PB90)	0.006 mg/L	2010-07-01 – 2010-12-31	2026Q3
Lead (PB90)	0.008 mg/L	2010-01-01 – 2010-06-30	2026Q3

Published compliance history

7 imported records. Status is as recorded in the source; historical records are not current advisories. Missing records do not establish that no violations occurred.

Twenty most recent imported compliance records
Rule / record	Period	Recorded status	Health-based (EPA classification)	Source quarter
Nitrate Rule / Monitoring, Regular	2024-07-01 – 2024-09-30	Resolved	No	2026Q3
Nitrate Rule / Monitoring, Regular	2024-01-01 – 2024-03-31	Resolved	No	2026Q3
Nitrate Rule / Monitoring, Regular	2024-01-01 – 2024-03-31	Resolved	No	2026Q3
Consumer Confidence Rule / Consumer Confidence Report Complete Failure to Report	2020-07-01 – —	Resolved	No	2026Q3
Synthetic Organic Chemicals / Monitoring, Regular	2019-01-01 – 2019-01-31	Resolved	No	2026Q3
Synthetic Organic Chemicals / Monitoring, Regular	2019-01-01 – 2019-01-31	Resolved	No	2026Q3
Consumer Confidence Rule / Consumer Confidence Report Inadequate Reporting	2018-10-01 – —	Resolved	No	2026Q3

Source dates and refresh checks

A refresh check is not a sample date. Publication periods, sample dates and checks are shown separately.

EPA SDWIS lead/copper summaries and service areas — source period: — – —; last checked: 2026-10-17
EPA SDWIS contacts and compliance records — source period: — – —; last checked: 2026-10-17
EPA UCMR 5 sample results — source period: 2023-01-03 – 2026-06-17; last checked: 2026-10-17

Administrative contact (EPA filing)

Cienega: 787-620-2277

An administrative filing contact may not be a customer-service line. Confirm current contact details with the provider.

Official state resources · How to read these records