Mission Hills Csd

Published drinking-water records and contacts for Mission Hills Csd. System CA4210019. Review sources and dates; not a real-time water assessment.

System ID: CA4210019
State or territory: CA
Published population served: 3600
System type (source code): CWS

Published records and dates

PFAS / lithium (EPA UCMR 5): 60 — 2023-01-17 – 2023-07-11
Lead and copper monitoring summaries: 96 — 1993-01-01 – 2025-12-31
California DDW laboratory results: 137 — 2026-01-29 – 2026-07-07

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	2023-07-11	Distribution Meter / EP001
4:2 FTS	< 0.003 µg/L	0.003 µg/L	2023-07-11	Distribution Meter / EP001
6:2 FTS	< 0.005 µg/L	0.005 µg/L	2023-07-11	Distribution Meter / EP001
8:2 FTS	< 0.005 µg/L	0.005 µg/L	2023-07-11	Distribution Meter / EP001
9Cl-PF3ONS	< 0.002 µg/L	0.002 µg/L	2023-07-11	Distribution Meter / EP001
ADONA	< 0.003 µg/L	0.003 µg/L	2023-07-11	Distribution Meter / EP001
HFPO-DA	< 0.005 µg/L	0.005 µg/L	2023-07-11	Distribution Meter / EP001
NEtFOSAA	< 0.005 µg/L	0.005 µg/L	2023-07-11	Distribution Meter / EP001
NFDHA	< 0.02 µg/L	0.02 µg/L	2023-07-11	Distribution Meter / EP001
NMeFOSAA	< 0.006 µg/L	0.006 µg/L	2023-07-11	Distribution Meter / EP001
PFBA	< 0.005 µg/L	0.005 µg/L	2023-07-11	Distribution Meter / EP001
PFBS	< 0.003 µg/L	0.003 µg/L	2023-07-11	Distribution Meter / EP001
PFDA	< 0.003 µg/L	0.003 µg/L	2023-07-11	Distribution Meter / EP001
PFDoA	< 0.003 µg/L	0.003 µg/L	2023-07-11	Distribution Meter / EP001
PFEESA	< 0.003 µg/L	0.003 µg/L	2023-07-11	Distribution Meter / EP001
PFHpA	< 0.003 µg/L	0.003 µg/L	2023-07-11	Distribution Meter / EP001
PFHpS	< 0.003 µg/L	0.003 µg/L	2023-07-11	Distribution Meter / EP001
PFHxA	< 0.003 µg/L	0.003 µg/L	2023-07-11	Distribution Meter / EP001
PFHxS	< 0.003 µg/L	0.003 µg/L	2023-07-11	Distribution Meter / EP001
PFMBA	< 0.003 µg/L	0.003 µg/L	2023-07-11	Distribution Meter / EP001
PFMPA	< 0.004 µg/L	0.004 µg/L	2023-07-11	Distribution Meter / EP001
PFNA	< 0.004 µg/L	0.004 µg/L	2023-07-11	Distribution Meter / EP001
PFOA	< 0.004 µg/L	0.004 µg/L	2023-07-11	Distribution Meter / EP001
PFOS	< 0.004 µg/L	0.004 µg/L	2023-07-11	Distribution Meter / EP001
PFPeA	< 0.003 µg/L	0.003 µg/L	2023-07-11	Distribution Meter / EP001
PFPeS	< 0.004 µg/L	0.004 µg/L	2023-07-11	Distribution Meter / EP001
PFTA	< 0.008 µg/L	0.008 µg/L	2023-07-11	Distribution Meter / EP001
PFTrDA	< 0.007 µg/L	0.007 µg/L	2023-07-11	Distribution Meter / EP001
PFUnA	< 0.002 µg/L	0.002 µg/L	2023-07-11	Distribution Meter / EP001
lithium	61.0 µg/L	9 µg/L	2023-07-11	Distribution Meter / EP001

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 mg/L	2025-01-01 – 2025-12-31	2026Q3
Lead (PB90)	0 mg/L	2024-01-01 – 2024-12-31	2026Q3
Lead (PB90)	0 mg/L	2023-01-01 – 2023-12-31	2026Q3
Lead (PB90)	0 mg/L	2022-01-01 – 2022-06-30	2026Q3
Copper (CU90)	1.7 mg/L	2021-01-01 – 2021-12-31	2026Q3
Lead (PB90)	0 mg/L	2021-01-01 – 2021-12-31	2026Q3
Lead (PB90)	0 mg/L	2020-01-01 – 2020-12-31	2026Q3
Lead (PB90)	0.0005 mg/L	2019-07-01 – 2019-12-31	2026Q3

Twelve most recent imported state laboratory records
Substance	Published result	Sample date	Location / source
IRON	300 UG/L	2026-07-07	WELL 07 / California DDW laboratory results
PERCHLORATE	< 1.000000000 UG/L	2026-07-07	WELL 06 / California DDW laboratory results
IRON	< 100.000000000 UG/L	2026-07-07	FILTRONICS FE/MN/TMT WELLS 5,6,7 / California DDW laboratory results
PERCHLORATE	< 1.000000000 UG/L	2026-07-07	WELL 05 / California DDW laboratory results
MANGANESE	77 UG/L	2026-07-07	WELL 05 / California DDW laboratory results
MANGANESE	< 10.000000000 UG/L	2026-07-07	WELL 06 / California DDW laboratory results
MANGANESE	< 10.000000000 UG/L	2026-07-07	FILTRONICS FE/MN/TMT WELLS 5,6,7 / California DDW laboratory results
IRON	< 100.000000000 UG/L	2026-07-07	WELL 06 / California DDW laboratory results
IRON	140 UG/L	2026-07-07	WELL 05 / California DDW laboratory results
MANGANESE	120 UG/L	2026-07-07	WELL 07 / California DDW laboratory results
IRON	< 100.000000000 UG/L	2026-06-10	WELL 06 / California DDW laboratory results
IRON	< 100.000000000 UG/L	2026-06-10	FILTRONICS FE/MN/TMT WELLS 5,6,7 / 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 / record	Period	Recorded status	Health-based (EPA classification)	Source quarter
Revised Total Coliform Rule / Monitoring, Routine (RTCR)	2017-04-01 – 2017-04-30	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
California DDW laboratory results — last successful check: 2026-10-17

Administrative contact (EPA filing)

Garner, Michael: 805-733-4366

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