No health-based violations on EPA record since 2016.
Serves about 7,515 people (1,945 connections) with groundwater from its own wells.
From EPA's record for CA2710005. PurityMap is independent of Castroville Community Services District.
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No health-based violations in the last 10 years, from EPA's SDWIS compliance database.
EPA required this system to test for 30 unregulated and emerging contaminants, from May 2025 to November 2025.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| Lithium | 40.2 µg/L | 10 µg/L EPA health reference level (screening, not a legal limit)Screening level, not a legal limit | Above the referenced health-based guidance value | 2025-05-07 to 2025-11-03 | UCMR5 Analytical Results: CASTROVILLE COMMUNITY SERVICES DISTRICT (CA2710005) |
| 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 | 2025-05-07 to 2025-11-03 | UCMR5 Analytical Results: CASTROVILLE COMMUNITY SERVICES DISTRICT (CA2710005) |
| 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 | 2025-05-07 to 2025-11-03 | UCMR5 Analytical Results: CASTROVILLE COMMUNITY SERVICES DISTRICT (CA2710005) |
| 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 | 2025-05-07 to 2025-11-03 | UCMR5 Analytical Results: CASTROVILLE COMMUNITY SERVICES DISTRICT (CA2710005) |
| 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 | 2025-05-07 to 2025-11-03 | UCMR5 Analytical Results: CASTROVILLE COMMUNITY SERVICES DISTRICT (CA2710005) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-05-07 to 2025-11-03 | UCMR5 Analytical Results: CASTROVILLE COMMUNITY SERVICES DISTRICT (CA2710005) |
| 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 | 2025-05-07 to 2025-11-03 | UCMR5 Analytical Results: CASTROVILLE COMMUNITY SERVICES DISTRICT (CA2710005) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-05-07 to 2025-11-03 | UCMR5 Analytical Results: CASTROVILLE COMMUNITY SERVICES DISTRICT (CA2710005) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-05-07 to 2025-11-03 | UCMR5 Analytical Results: CASTROVILLE COMMUNITY SERVICES DISTRICT (CA2710005) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-05-07 to 2025-11-03 | UCMR5 Analytical Results: CASTROVILLE COMMUNITY SERVICES DISTRICT (CA2710005) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-05-07 to 2025-11-03 | UCMR5 Analytical Results: CASTROVILLE COMMUNITY SERVICES DISTRICT (CA2710005) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-05-07 to 2025-11-03 | UCMR5 Analytical Results: CASTROVILLE COMMUNITY SERVICES DISTRICT (CA2710005) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-05-07 to 2025-11-03 | UCMR5 Analytical Results: CASTROVILLE COMMUNITY SERVICES DISTRICT (CA2710005) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-05-07 to 2025-11-03 | UCMR5 Analytical Results: CASTROVILLE COMMUNITY SERVICES DISTRICT (CA2710005) |
| 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 | 2025-05-07 to 2025-11-03 | UCMR5 Analytical Results: CASTROVILLE COMMUNITY SERVICES DISTRICT (CA2710005) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-05-07 to 2025-11-03 | UCMR5 Analytical Results: CASTROVILLE COMMUNITY SERVICES DISTRICT (CA2710005) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-05-07 to 2025-11-03 | UCMR5 Analytical Results: CASTROVILLE COMMUNITY SERVICES DISTRICT (CA2710005) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-05-07 to 2025-11-03 | UCMR5 Analytical Results: CASTROVILLE COMMUNITY SERVICES DISTRICT (CA2710005) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-05-07 to 2025-11-03 | UCMR5 Analytical Results: CASTROVILLE COMMUNITY SERVICES DISTRICT (CA2710005) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-05-07 to 2025-11-03 | UCMR5 Analytical Results: CASTROVILLE COMMUNITY SERVICES DISTRICT (CA2710005) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-05-07 to 2025-11-03 | UCMR5 Analytical Results: CASTROVILLE COMMUNITY SERVICES DISTRICT (CA2710005) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2025-05-07 to 2025-11-03 | UCMR5 Analytical Results: CASTROVILLE COMMUNITY SERVICES DISTRICT (CA2710005) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-05-07 to 2025-11-03 | UCMR5 Analytical Results: CASTROVILLE COMMUNITY SERVICES DISTRICT (CA2710005) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-05-07 to 2025-11-03 | UCMR5 Analytical Results: CASTROVILLE COMMUNITY SERVICES DISTRICT (CA2710005) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-05-07 to 2025-11-03 | UCMR5 Analytical Results: CASTROVILLE COMMUNITY SERVICES DISTRICT (CA2710005) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-05-07 to 2025-11-03 | UCMR5 Analytical Results: CASTROVILLE COMMUNITY SERVICES DISTRICT (CA2710005) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-05-07 to 2025-11-03 | UCMR5 Analytical Results: CASTROVILLE COMMUNITY SERVICES DISTRICT (CA2710005) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-05-07 to 2025-11-03 | UCMR5 Analytical Results: CASTROVILLE COMMUNITY SERVICES DISTRICT (CA2710005) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-05-07 to 2025-11-03 | UCMR5 Analytical Results: CASTROVILLE COMMUNITY SERVICES DISTRICT (CA2710005) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-05-07 to 2025-11-03 | UCMR5 Analytical Results: CASTROVILLE COMMUNITY SERVICES DISTRICT (CA2710005) |
Screening tells you if something is worth a closer look; a lab result is the number you can act on.
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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 →Castroville Community Services District's phone number on EPA record is 831-633-2560. Its mailing address is 11499 Geil Street, CASTROVILLE, CA 95012.
According to EPA's record, Castroville Community Services District uses groundwater from its own wells.
No health-based violations on EPA record since 2016. EPA also lists 2 missed or late tests or reports in 10 years. The record comes from EPA's SDWIS compliance database.
Lead was not detected at the 90th percentile of tap samples in Castroville Community Services District's latest lead and copper round, which ended in December 2025. The federal action level is 15 µg/L.
PurityMap has no verified website for Castroville Community Services District. Its phone number on EPA record is 831-633-2560. Its mailing address on EPA record is 11499 Geil Street, CASTROVILLE, CA 95012. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.