City of Arroyo Grande Utilities Division

Published drinking-water records and contacts for City of Arroyo Grande Utilities Division. System CA4010001. Review sources and dates; not a real-time water assessment.

System ID: CA4010001
State or territory: CA
Published population served: 17963
System type (source code): CWS

Published records and dates

PFAS / lithium (EPA UCMR 5): 240 — 2023-12-19 – 2024-09-10
Lead and copper monitoring summaries: 45 — 1992-07-01 – 2026-12-31
California DDW laboratory results: 388 — 2026-01-20 – 2026-06-23

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	2024-09-10	Wells 1, 3, 4, 5, 7 & 8 & Lopez / 4010001801
4:2 FTS	< 0.003 µg/L	0.003 µg/L	2024-09-10	Wells 1, 3, 4, 5, 7 & 8 & Lopez / 4010001801
6:2 FTS	< 0.005 µg/L	0.005 µg/L	2024-09-10	Wells 1, 3, 4, 5, 7 & 8 & Lopez / 4010001801
8:2 FTS	< 0.005 µg/L	0.005 µg/L	2024-09-10	Wells 1, 3, 4, 5, 7 & 8 & Lopez / 4010001801
9Cl-PF3ONS	< 0.002 µg/L	0.002 µg/L	2024-09-10	Wells 1, 3, 4, 5, 7 & 8 & Lopez / 4010001801
ADONA	< 0.003 µg/L	0.003 µg/L	2024-09-10	Wells 1, 3, 4, 5, 7 & 8 & Lopez / 4010001801
HFPO-DA	< 0.005 µg/L	0.005 µg/L	2024-09-10	Wells 1, 3, 4, 5, 7 & 8 & Lopez / 4010001801
NEtFOSAA	< 0.005 µg/L	0.005 µg/L	2024-09-10	Wells 1, 3, 4, 5, 7 & 8 & Lopez / 4010001801
NFDHA	< 0.02 µg/L	0.02 µg/L	2024-09-10	Wells 1, 3, 4, 5, 7 & 8 & Lopez / 4010001801
NMeFOSAA	< 0.006 µg/L	0.006 µg/L	2024-09-10	Wells 1, 3, 4, 5, 7 & 8 & Lopez / 4010001801
PFBA	< 0.005 µg/L	0.005 µg/L	2024-09-10	Wells 1, 3, 4, 5, 7 & 8 & Lopez / 4010001801
PFBS	0.011 µg/L	0.003 µg/L	2024-09-10	Wells 1, 3, 4, 5, 7 & 8 & Lopez / 4010001801
PFDA	< 0.003 µg/L	0.003 µg/L	2024-09-10	Wells 1, 3, 4, 5, 7 & 8 & Lopez / 4010001801
PFDoA	< 0.003 µg/L	0.003 µg/L	2024-09-10	Wells 1, 3, 4, 5, 7 & 8 & Lopez / 4010001801
PFEESA	< 0.003 µg/L	0.003 µg/L	2024-09-10	Wells 1, 3, 4, 5, 7 & 8 & Lopez / 4010001801
PFHpA	< 0.003 µg/L	0.003 µg/L	2024-09-10	Wells 1, 3, 4, 5, 7 & 8 & Lopez / 4010001801
PFHpS	< 0.003 µg/L	0.003 µg/L	2024-09-10	Wells 1, 3, 4, 5, 7 & 8 & Lopez / 4010001801
PFHxA	0.0033 µg/L	0.003 µg/L	2024-09-10	Wells 1, 3, 4, 5, 7 & 8 & Lopez / 4010001801
PFHxS	0.0043 µg/L	0.003 µg/L	2024-09-10	Wells 1, 3, 4, 5, 7 & 8 & Lopez / 4010001801
PFMBA	< 0.003 µg/L	0.003 µg/L	2024-09-10	Wells 1, 3, 4, 5, 7 & 8 & Lopez / 4010001801
PFMPA	< 0.004 µg/L	0.004 µg/L	2024-09-10	Wells 1, 3, 4, 5, 7 & 8 & Lopez / 4010001801
PFNA	< 0.004 µg/L	0.004 µg/L	2024-09-10	Wells 1, 3, 4, 5, 7 & 8 & Lopez / 4010001801
PFOA	0.0046 µg/L	0.004 µg/L	2024-09-10	Wells 1, 3, 4, 5, 7 & 8 & Lopez / 4010001801
PFOS	0.0056 µg/L	0.004 µg/L	2024-09-10	Wells 1, 3, 4, 5, 7 & 8 & Lopez / 4010001801
PFPeA	0.0033 µg/L	0.003 µg/L	2024-09-10	Wells 1, 3, 4, 5, 7 & 8 & Lopez / 4010001801
PFPeS	< 0.004 µg/L	0.004 µg/L	2024-09-10	Wells 1, 3, 4, 5, 7 & 8 & Lopez / 4010001801
PFTA	< 0.008 µg/L	0.008 µg/L	2024-09-10	Wells 1, 3, 4, 5, 7 & 8 & Lopez / 4010001801
PFTrDA	< 0.007 µg/L	0.007 µg/L	2024-09-10	Wells 1, 3, 4, 5, 7 & 8 & Lopez / 4010001801
PFUnA	< 0.002 µg/L	0.002 µg/L	2024-09-10	Wells 1, 3, 4, 5, 7 & 8 & Lopez / 4010001801
lithium	14.0 µg/L	9 µg/L	2024-09-10	Wells 1, 3, 4, 5, 7 & 8 & Lopez / 4010001801

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	2024-01-01 – 2026-12-31	2026Q3
Lead (PB90)	0 mg/L	2021-01-01 – 2023-12-31	2026Q3
Lead (PB90)	0 mg/L	2018-01-01 – 2020-12-31	2026Q3
Lead (PB90)	0 mg/L	2017-01-01 – 2019-12-31	2026Q3
Lead (PB90)	0 mg/L	2014-01-01 – 2016-12-31	2026Q3
Lead (PB90)	0.011 mg/L	2011-01-01 – 2013-12-31	2026Q3
Lead (PB90)	0 mg/L	2008-01-01 – 2010-12-31	2026Q3
Lead (PB90)	0 mg/L	2005-01-01 – 2007-12-31	2026Q3

Twelve most recent imported state laboratory records
Substance	Published result	Sample date	Location / source
MANGANESE	44 UG/L	2026-06-23	WELL 07 / California DDW laboratory results
IRON	300 UG/L	2026-06-23	WELL 07 / California DDW laboratory results
PERFLUOROUNDECANOIC ACID (PFUNA)	< 2.000000000 NG/L	2026-06-11	WELL 01 / California DDW laboratory results
PERFLUOROOCTANE SULFONIC ACID 6:2 FTS	< 5.000000000 NG/L	2026-06-11	WELL 03 / California DDW laboratory results
PERFLUOROHEPTANESULFONIC ACID (PFHPS)	< 2.000000000 NG/L	2026-06-11	WELL 09 (1990) / California DDW laboratory results
PERFLUOROBUTANE SULFONIC ACID (PFBS)	26 NG/L	2026-06-11	WELL 04 / California DDW laboratory results
PERFLUOROCTANOIC ACID (PFOA)	12 NG/L	2026-06-11	WELL 01 / California DDW laboratory results
PERFLUOROBUTANOIC ACID (PFBA)	5.0 NG/L	2026-06-11	WELL 03 / California DDW laboratory results
PERFLUOROPENTANESULFONIC ACID (PFPES)	< 2.000000000 NG/L	2026-06-11	WELL 08 (1990) / California DDW laboratory results
PERFLUORO PFMBA	< 2.000000000 NG/L	2026-06-11	WELL 01 / California DDW laboratory results
PERFLUOROCTANOIC ACID (PFOA)	5.7 NG/L	2026-06-11	WELL 05 SERVICE YARD / California DDW laboratory results
PERFLUOROOCTANE SULFONIC ACID 6:2 FTS	< 5.000000000 NG/L	2026-06-11	WELL 01 / 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)	2025-05-01 – 2025-06-30	Archived	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: 2026-10-18

Administrative contact (EPA filing)

Hix, Hailie: 805-473-5464

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