No open health-based violations on EPA record in the last 10 years.
Serves about 589 people (332 connections) with groundwater bought from Kingbrook II Rural Water System.
From EPA's record for SD4600398. PurityMap is independent of Lake Preston.
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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 May 2017 | Stage 1 Disinfectants and Disinfection Byproducts 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 →Lake Preston's phone number on EPA record is 6058474140. Its mailing address is 111 NE THIRD STREET; PO BOX 39, LAKE PRESTON, SD 57249.
According to EPA's record, Lake Preston uses groundwater bought from Kingbrook II Rural Water System.
EPA's record shows 1 health-based violation for Lake Preston in the 10 years to July 9, 2026. No open health-based violations on EPA record in the last 10 years. EPA also lists 3 missed or late tests or reports in 10 years. The record comes from EPA's SDWIS compliance database.
The 90th-percentile lead result in Lake Preston's latest lead and copper round, which ended in December 2024, was 7 µg/L, below the federal action level of 15 µg/L.
PurityMap has no verified website for Lake Preston. Its phone number on EPA record is 6058474140. Its mailing address on EPA record is 111 NE THIRD STREET; PO BOX 39, LAKE PRESTON, SD 57249. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.