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Mesa Water District

Published drinking-water records and contacts for Mesa Water District. System CA3010004. Review sources and dates; not a real-time water assessment.

System ID
CA3010004
State or territory
CA
Published population served
110000
System type (source code)
CWS

Published records and dates

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

Read the provider’s annual water quality report

Report link listed: 2026-10-05. This is not the report’s sampling date.

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
SubstancePublished resultReporting limitSample dateSampling location
11Cl-PF3OUdS< 0.005 µg/L0.005 µg/L2024-08-14Well 12 / 3010004831
4:2 FTS< 0.003 µg/L0.003 µg/L2024-08-14Well 12 / 3010004831
6:2 FTS< 0.005 µg/L0.005 µg/L2024-08-14Well 12 / 3010004831
8:2 FTS< 0.005 µg/L0.005 µg/L2024-08-14Well 12 / 3010004831
9Cl-PF3ONS< 0.002 µg/L0.002 µg/L2024-08-14Well 12 / 3010004831
ADONA< 0.003 µg/L0.003 µg/L2024-08-14Well 12 / 3010004831
HFPO-DA< 0.005 µg/L0.005 µg/L2024-08-14Well 12 / 3010004831
NEtFOSAA< 0.005 µg/L0.005 µg/L2024-08-14Well 12 / 3010004831
NFDHA< 0.02 µg/L0.02 µg/L2024-08-14Well 12 / 3010004831
NMeFOSAA< 0.006 µg/L0.006 µg/L2024-08-14Well 12 / 3010004831
PFBA< 0.005 µg/L0.005 µg/L2024-08-14Well 12 / 3010004831
PFBS< 0.003 µg/L0.003 µg/L2024-08-14Well 12 / 3010004831
PFDA< 0.003 µg/L0.003 µg/L2024-08-14Well 12 / 3010004831
PFDoA< 0.003 µg/L0.003 µg/L2024-08-14Well 12 / 3010004831
PFEESA< 0.003 µg/L0.003 µg/L2024-08-14Well 12 / 3010004831
PFHpA< 0.003 µg/L0.003 µg/L2024-08-14Well 12 / 3010004831
PFHpS< 0.003 µg/L0.003 µg/L2024-08-14Well 12 / 3010004831
PFHxA< 0.003 µg/L0.003 µg/L2024-08-14Well 12 / 3010004831
PFHxS< 0.003 µg/L0.003 µg/L2024-08-14Well 12 / 3010004831
PFMBA< 0.003 µg/L0.003 µg/L2024-08-14Well 12 / 3010004831
PFMPA< 0.004 µg/L0.004 µg/L2024-08-14Well 12 / 3010004831
PFNA< 0.004 µg/L0.004 µg/L2024-08-14Well 12 / 3010004831
PFOA< 0.004 µg/L0.004 µg/L2024-08-14Well 12 / 3010004831
PFOS< 0.004 µg/L0.004 µg/L2024-08-14Well 12 / 3010004831
PFPeA< 0.003 µg/L0.003 µg/L2024-08-14Well 12 / 3010004831
PFPeS< 0.004 µg/L0.004 µg/L2024-08-14Well 12 / 3010004831
PFTA< 0.008 µg/L0.008 µg/L2024-08-14Well 12 / 3010004831
PFTrDA< 0.007 µg/L0.007 µg/L2024-08-14Well 12 / 3010004831
PFUnA< 0.002 µg/L0.002 µg/L2024-08-14Well 12 / 3010004831
lithium< 9 µg/L9 µg/L2024-08-14Well 12 / 3010004831

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
SubstancePublished 90th percentileMonitoring periodSource quarter
Lead (PB90) 0 mg/L2024-01-01 – 2026-12-312026Q3
Lead (PB90) 0 mg/L2021-01-01 – 2023-12-312026Q3
Lead (PB90) 0 mg/L2018-01-01 – 2020-12-312026Q3
Lead (PB90) 0 mg/L2018-01-01 – 2020-12-312026Q3
Lead (PB90) 0 mg/L2015-01-01 – 2017-12-312026Q3
Lead (PB90) 0 mg/L2012-01-01 – 2014-12-312026Q3
Lead (PB90) 0 mg/L2009-01-01 – 2011-12-312026Q3
Lead (PB90) 0 mg/L2006-01-01 – 2008-12-312026Q3
Twelve most recent imported state laboratory records
SubstancePublished resultSample dateLocation / source
LEAD< 5.000000000 UG/L2026-06-22LCR Tap Sample / California DDW laboratory results
COPPER, FREE57 UG/L2026-06-22LCR Tap Sample / California DDW laboratory results
LEAD< 5.000000000 UG/L2026-06-22LCR Tap Sample / California DDW laboratory results
COPPER, FREE< 50.000000000 UG/L2026-06-22LCR Tap Sample / California DDW laboratory results
COPPER, FREE92 UG/L2026-06-18LCR Tap Sample / California DDW laboratory results
COPPER, FREE< 50.000000000 UG/L2026-06-18LCR Tap Sample / California DDW laboratory results
COPPER, FREE< 50.000000000 UG/L2026-06-18LCR Tap Sample / California DDW laboratory results
COPPER, FREE53 UG/L2026-06-18LCR Tap Sample / California DDW laboratory results
LEAD< 5.000000000 UG/L2026-06-18LCR Tap Sample / California DDW laboratory results
COPPER, FREE98 UG/L2026-06-18LCR Tap Sample / California DDW laboratory results
COPPER, FREE79 UG/L2026-06-18LCR Tap Sample / California DDW laboratory results
LEAD< 5.000000000 UG/L2026-06-18LCR Tap Sample / California DDW laboratory results

State sampling points can include untreated water. Publisher qualifiers and units are retained; consult the full source notes before interpreting a record.

Download state records with source notes (CSV)

Published compliance history

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

Source dates and refresh checks

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

Administrative contact (EPA filing)

Hernandez, Juan: 949-207-5468

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