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City of Chino Hills

Published drinking-water records and contacts for City of Chino Hills. System CA3610036. Review sources and dates; not a real-time water assessment.

System ID
CA3610036
State or territory
CA
Published population served
76414
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.

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/L2024-03-25WFA Intertie / 3610036020
4:2 FTS< 0.003 µg/L0.003 µg/L2024-03-25WFA Intertie / 3610036020
6:2 FTS< 0.005 µg/L0.005 µg/L2024-03-25WFA Intertie / 3610036020
8:2 FTS< 0.005 µg/L0.005 µg/L2024-03-25WFA Intertie / 3610036020
9Cl-PF3ONS< 0.002 µg/L0.002 µg/L2024-03-25WFA Intertie / 3610036020
ADONA< 0.003 µg/L0.003 µg/L2024-03-25WFA Intertie / 3610036020
HFPO-DA< 0.005 µg/L0.005 µg/L2024-03-25WFA Intertie / 3610036020
NEtFOSAA< 0.005 µg/L0.005 µg/L2024-01-18WFA Intertie / 3610036020
NFDHA< 0.02 µg/L0.02 µg/L2024-03-25WFA Intertie / 3610036020
NMeFOSAA< 0.006 µg/L0.006 µg/L2024-01-18WFA Intertie / 3610036020
PFBA< 0.005 µg/L0.005 µg/L2024-03-25WFA Intertie / 3610036020
PFBS< 0.003 µg/L0.003 µg/L2024-03-25WFA Intertie / 3610036020
PFDA< 0.003 µg/L0.003 µg/L2024-03-25WFA Intertie / 3610036020
PFDoA< 0.003 µg/L0.003 µg/L2024-03-25WFA Intertie / 3610036020
PFEESA< 0.003 µg/L0.003 µg/L2024-03-25WFA Intertie / 3610036020
PFHpA< 0.003 µg/L0.003 µg/L2024-03-25WFA Intertie / 3610036020
PFHpS< 0.003 µg/L0.003 µg/L2024-03-25WFA Intertie / 3610036020
PFHxA< 0.003 µg/L0.003 µg/L2024-03-25WFA Intertie / 3610036020
PFHxS< 0.003 µg/L0.003 µg/L2024-03-25WFA Intertie / 3610036020
PFMBA< 0.003 µg/L0.003 µg/L2024-03-25WFA Intertie / 3610036020
PFMPA< 0.004 µg/L0.004 µg/L2024-03-25WFA Intertie / 3610036020
PFNA< 0.004 µg/L0.004 µg/L2024-03-25WFA Intertie / 3610036020
PFOA< 0.004 µg/L0.004 µg/L2024-03-25WFA Intertie / 3610036020
PFOS< 0.004 µg/L0.004 µg/L2024-03-25WFA Intertie / 3610036020
PFPeA< 0.003 µg/L0.003 µg/L2024-03-25WFA Intertie / 3610036020
PFPeS< 0.004 µg/L0.004 µg/L2024-03-25WFA Intertie / 3610036020
PFTA< 0.008 µg/L0.008 µg/L2024-01-18WFA Intertie / 3610036020
PFTrDA< 0.007 µg/L0.007 µg/L2024-01-18WFA Intertie / 3610036020
PFUnA< 0.002 µg/L0.002 µg/L2024-03-25WFA Intertie / 3610036020
lithium< 9 µg/L9 µg/L2024-01-18WFA Intertie / 3610036020

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/L2022-01-01 – 2024-12-312026Q3
Lead (PB90) 0 mg/L2019-01-01 – 2021-12-312026Q3
Lead (PB90) 0.0019 mg/L2016-01-01 – 2018-12-312026Q3
Lead (PB90) 0 mg/L2013-01-01 – 2015-12-312026Q3
Lead (PB90) 0 mg/L2010-01-01 – 2012-12-312026Q3
Lead (PB90) 0.006 mg/L2007-01-01 – 2009-12-312026Q3
Lead (PB90) 0.006 mg/L2006-01-01 – 2006-12-312026Q3
Lead (PB90) 0.006 mg/L2004-01-01 – 2006-12-312026Q3
Twelve most recent imported state laboratory records
SubstancePublished resultSample dateLocation / source
NITRATE4.1 MG/L2026-07-07BOOSTER 9 - BLEND & GAC SAMPLING STATION / California DDW laboratory results
PERCHLORATE0.52 UG/L2026-07-07BOOSTER 9 - BLEND & GAC SAMPLING STATION / California DDW laboratory results
ARSENIC1.0 UG/L2026-07-07BOOSTER 9 - BLEND & GAC SAMPLING STATION / California DDW laboratory results
PERCHLORATE< 1.000000000 UG/L2026-06-30BOOSTER 9 - BLEND & GAC SAMPLING STATION / California DDW laboratory results
NITRATE3.8 MG/L2026-06-30BOOSTER 9 - BLEND & GAC SAMPLING STATION / California DDW laboratory results
ARSENIC< 2.000000000 UG/L2026-06-30BOOSTER 9 - BLEND & GAC SAMPLING STATION / California DDW laboratory results
PERFLUORODODECANOIC ACID (PFDOA)< 1.910000000 NG/L2026-06-25WELL 01A (BROADFOOT) / California DDW laboratory results
PERFLUOROHEXANE SULFONIC ACID (PFHxS)4.81 NG/L2026-06-25WELL 07B / California DDW laboratory results
PERFLUORO PFEESA< 1.910000000 NG/L2026-06-25WELL 01A (BROADFOOT) / California DDW laboratory results
PERFLUOROHEPTANESULFONIC ACID (PFHPS)< 1.970000000 NG/L2026-06-25WELL 07B / California DDW laboratory results
PERFLUOROOCTANE SULFONIC ACID 6:2 FTS< 1.910000000 NG/L2026-06-25WELL 01A (BROADFOOT) / California DDW laboratory results
NITRATE3.9 MG/L2026-06-25BOOSTER 9 - BLEND & GAC SAMPLING STATION / 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

1 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 / recordPeriodRecorded statusHealth-based (EPA classification)Source quarter
Nitrate Rule / Maximum Contaminant Level Violation, Single Sample1984-09-01 – 1984-09-30ArchivedYes2026Q3

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)

Wiley, Mark: 909-364-2854

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