No open health-based violations on EPA record in the last 10 years.
Serves about 230 people (77 connections) with surface water from its own intake.
From EPA's record for CA3500006. PurityMap is independent of CSA No. 31 Stonegate WS.
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1 health-based violation in the last 10 years, from EPA's SDWIS compliance database.
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| From April 2022 | Carbon, total | – | TT | Archived |
No lab results for other contaminants (like PFAS) are on file for this system. EPA required that testing from systems serving more than 3,300 people, plus a sample of smaller ones.
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 →CSA No. 31 Stonegate WS's phone number on EPA record is 831-636-4170. Its mailing address is 2301 Technology Parkway, HOLLISTER, CA 95023.
According to EPA's record, CSA No. 31 Stonegate WS uses surface water from its own intake.
EPA's record shows 1 health-based violation for CSA No. 31 Stonegate WS in the 10 years to July 9, 2026. No open health-based violations on EPA record in the last 10 years. 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 CSA No. 31 Stonegate WS'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 CSA No. 31 Stonegate WS. Its phone number on EPA record is 831-636-4170. Its mailing address on EPA record is 2301 Technology Parkway, HOLLISTER, CA 95023. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.