No open health-based violations on EPA record in the last 10 years.
Serves about 542 people (218 connections) with groundwater from its own wells.
From EPA's record for IA2328024. PurityMap is independent of Delmar Water Supply.
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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 January 2018 | Groundwater Rule | – | – | Resolved |
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.
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Follow this water →Delmar Water Supply's phone number on EPA record is 563-212-0543. Its mailing address is ATTN JAMES CONNOLLY OPERATOR, 701 S NIAGARA ST, MAQUOKETA, IA 52060.
According to EPA's record, Delmar Water Supply uses groundwater from its own wells.
EPA's record shows 1 health-based violation for Delmar Water Supply in the 10 years to July 9, 2026. No open health-based violations on EPA record in the last 10 years. The record comes from EPA's SDWIS compliance database.
The 90th-percentile lead result in Delmar Water Supply's latest lead and copper round, which ended in December 2023, was 2 µg/L, below the federal action level of 15 µg/L.
PurityMap has no verified website for Delmar Water Supply. Its phone number on EPA record is 563-212-0543. Its mailing address on EPA record is ATTN JAMES CONNOLLY OPERATOR, 701 S NIAGARA ST, MAQUOKETA, IA 52060. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.