THOMPSON, IA · Hancock County
CRYSTAL LAKE WATER SUPPLY Water System
Consumer Confidence Report status
CRYSTAL LAKE WATER SUPPLY must publish a Consumer Confidence Report — the annual drinking water quality report covering calendar year 2026 — by July 1, 2027.
As of August 1, 2026, EPA's federal records show no open violations for CRYSTAL LAKE WATER SUPPLY.
Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 2026. This is a record-keeping and public-information tool — it does not replace Iowa’s official records. Always confirm current status with Iowa before making decisions based on this information.
System facts
- System ID (PWSID)
- IA4115092
- System type
- Community Water System
- Population served
- 255
- Service connections
- 147
- Ownership
- local government
- Water source
- groundwater (wells)
CRYSTAL LAKE WATER SUPPLY is one of 1,221 community water systems in Iowa in the 500 or fewer people size category, serving 255 people from groundwater.
As of August 1, 2026, its federal record holds 1 entry in 2022, all of which EPA lists as closed. Nothing has been added since 2022.
None of the 1 are monitoring or reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset; these involve water-quality, treatment, or public-notice findings instead. The record involves inorganic chemicals.
Violation history
Maximum Contaminant Level Violation, Single Sample
Health-basedNitrite
October 1, 2022 – November 15, 2022
Resolved
Resolved addressed and confirmed by the state
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| October 1, 2022 – November 15, 2022 | Maximum Contaminant Level Violation, Single Sample | Nitrite | Health-based | Resolved |
Resolved addressed and confirmed by the state
Enforcement actions
- September 30, 1997State Compliance achieved1 linked violation
- September 30, 1997State Compliance achieved3 linked violations
- December 23, 1996State Formal Notice of Violation issued3 linked violations
- December 20, 1996State Public Notification requested12 linked violations
- December 9, 1996State Public Notification received1 linked violation
- October 12, 1988State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
- March 1, 1982State Unresolvedgeneral compliance action — not tied to a specific violation on record
Common questions
Is CRYSTAL LAKE WATER SUPPLY required to publish a Consumer Confidence Report?
- Yes. CRYSTAL LAKE WATER SUPPLY is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.
When is CRYSTAL LAKE WATER SUPPLY’s next Consumer Confidence Report due?
- CRYSTAL LAKE WATER SUPPLY’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does CRYSTAL LAKE WATER SUPPLY have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for CRYSTAL LAKE WATER SUPPLY.
What is a Consumer Confidence Report?
- A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.
Contact
CRYSTAL LAKE WATER SUPPLY
515-590-1557
THOMPSON, IA 50478