1 open health-based violation on EPA record.
Serves about 7,269 people (2,282 connections) with groundwater from its own wells.
From EPA's record for CA0410004. PurityMap is independent of City of Gridley.
Are you this utility? Correct this listing →
1 health-based violation in the last 10 years, from EPA's SDWIS compliance database.
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| From October 2024 | Lead and copper rule revisions | – | – | Unaddressed |
EPA required this system to test for 30 unregulated and emerging contaminants, from June 2024 to December 2024.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| Perfluorooctanesulfonic acid (PFOS) | 10.5 ng/L | 4.0 ng/L federal MCL (2024) | Above a historical reference; current applicability unverified | 2024-06-03 to 2024-12-02 | UCMR5 Analytical Results: CITY OF GRIDLEY (CA0410004) |
| Perfluorohexanesulfonic acid (PFHxS) | 12.8 ng/L | 10 ng/L federal MCL (2024) | Above a historical reference; current applicability unverified | 2024-06-03 to 2024-12-02 | UCMR5 Analytical Results: CITY OF GRIDLEY (CA0410004) |
| Perfluorononanoic acid (PFNA) | 9.9 ng/L | 10 ng/L federal MCL (2024) | Within a historical reference; current applicability unverified | 2024-06-03 to 2024-12-02 | UCMR5 Analytical Results: CITY OF GRIDLEY (CA0410004) |
| Perfluorohexanoic acid (PFHxA) | 5.3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Within a historical reference; current applicability unverified | 2024-06-03 to 2024-12-02 | UCMR5 Analytical Results: CITY OF GRIDLEY (CA0410004) |
| Perfluoroheptanoic acid (PFHpA) | 3.5 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2024-06-03 to 2024-12-02 | UCMR5 Analytical Results: CITY OF GRIDLEY (CA0410004) |
| Perfluoropentanoic acid (PFPeA) | 6.5 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2024-06-03 to 2024-12-02 | UCMR5 Analytical Results: CITY OF GRIDLEY (CA0410004) |
| 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-03 to 2024-12-02 | UCMR5 Analytical Results: CITY OF GRIDLEY (CA0410004) |
| 1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-03 to 2024-12-02 | UCMR5 Analytical Results: CITY OF GRIDLEY (CA0410004) |
| 1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-03 to 2024-12-02 | UCMR5 Analytical Results: CITY OF GRIDLEY (CA0410004) |
| 1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-03 to 2024-12-02 | UCMR5 Analytical Results: CITY OF GRIDLEY (CA0410004) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-03 to 2024-12-02 | UCMR5 Analytical Results: CITY OF GRIDLEY (CA0410004) |
| 9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-03 to 2024-12-02 | UCMR5 Analytical Results: CITY OF GRIDLEY (CA0410004) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-06-03 to 2024-12-02 | UCMR5 Analytical Results: CITY OF GRIDLEY (CA0410004) |
| Lithium | < 9 µg/L | 10 µg/L EPA health reference level (screening, not a legal limit)Screening level, not a legal limit | Not detected above the reporting limit | 2024-06-03 to 2024-12-02 | UCMR5 Analytical Results: CITY OF GRIDLEY (CA0410004) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-03 to 2024-12-02 | UCMR5 Analytical Results: CITY OF GRIDLEY (CA0410004) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-03 to 2024-12-02 | UCMR5 Analytical Results: CITY OF GRIDLEY (CA0410004) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-03 to 2024-12-02 | UCMR5 Analytical Results: CITY OF GRIDLEY (CA0410004) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-03 to 2024-12-02 | UCMR5 Analytical Results: CITY OF GRIDLEY (CA0410004) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-03 to 2024-12-02 | UCMR5 Analytical Results: CITY OF GRIDLEY (CA0410004) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-03 to 2024-12-02 | UCMR5 Analytical Results: CITY OF GRIDLEY (CA0410004) |
| Perfluorobutanesulfonic acid (PFBS) | < 3 ng/L | 2,000 ng/L EPA health advisory (screening, not a legal limit)Screening level, not a legal limit | Not detected above the reporting limit | 2024-06-03 to 2024-12-02 | UCMR5 Analytical Results: CITY OF GRIDLEY (CA0410004) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-03 to 2024-12-02 | UCMR5 Analytical Results: CITY OF GRIDLEY (CA0410004) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-03 to 2024-12-02 | UCMR5 Analytical Results: CITY OF GRIDLEY (CA0410004) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-03 to 2024-12-02 | UCMR5 Analytical Results: CITY OF GRIDLEY (CA0410004) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-03 to 2024-12-02 | UCMR5 Analytical Results: CITY OF GRIDLEY (CA0410004) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-06-03 to 2024-12-02 | UCMR5 Analytical Results: CITY OF GRIDLEY (CA0410004) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-03 to 2024-12-02 | UCMR5 Analytical Results: CITY OF GRIDLEY (CA0410004) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-03 to 2024-12-02 | UCMR5 Analytical Results: CITY OF GRIDLEY (CA0410004) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-03 to 2024-12-02 | UCMR5 Analytical Results: CITY OF GRIDLEY (CA0410004) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-03 to 2024-12-02 | UCMR5 Analytical Results: CITY OF GRIDLEY (CA0410004) |
Screening tells you if something is worth a closer look; a lab result is the number you can act on.
As an Amazon Associate, PurityMap earns from qualifying purchases. Affiliate disclosure
Screening: quick check, not lab-grade
Safe Home (EnviroTestKits)
Lead, read as one of three ranges: 0–4, 5–15 or 15+ ppb
Turnaround: 5 minutes
What it can't tell you: It shows a lead range, not an exact level, and tests nothing else unless you pay extra for the optional lab test.
Lab-certified results
ETR Laboratories
50+ substances, including lead, copper, arsenic, nitrate, hardness and coliform bacteria
Environmental Testing and Research Laboratories (ETR Labs), Leominster, MA · ISO/IEC 17025:2017, ANAB certificate AT-2638 · 2–4 business days after the lab receives it
What it can't tell you: It does not test PFAS, and not every result on the panel falls under the lab's accredited scope.
Get PurityMap updates about this water system.
Follow this water →City of Gridley's phone number on EPA record is 530-846-5695. Its mailing address is 685 Kentucky Street, GRIDLEY, CA 95948.
According to EPA's record, City of Gridley uses groundwater from its own wells.
EPA's record shows 1 health-based violation for City of Gridley in the 10 years to July 9, 2026. EPA's record lists 1 open health-based violation. EPA also lists 1 missed or late test or report in 10 years. The record comes from EPA's SDWIS compliance database.
Lead was not detected at the 90th percentile of tap samples in City of Gridley's latest lead and copper round, which ended in December 2023. The federal action level is 15 µg/L.
PurityMap has no verified website for City of Gridley. Its phone number on EPA record is 530-846-5695. Its mailing address on EPA record is 685 Kentucky Street, GRIDLEY, CA 95948. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.