Public water system record
Crystal Lake Water Supply
Serves Crystal Lake, Hancock County, IA · 255 people served
Federal records show 1 health-based violation and no monitoring/reporting issues for Crystal Lake Water Supply in the last ten years. The most serious issue in this window was a resolved Nitrite violation.
System profile
- Health-based violations, last 10 years
- 1
- Resolved
- 1
- Unresolved
- 0
- Any acute record
- Yes
- Monitoring issues, last 10 years
- 0
Key facts
- Crystal Lake Water Supply draws water from 2 wells.
- Highest measured level in the last 10 years: Nitrite, 1.426 mg/L, federal limit 1 mg/L (1.4 times the limit), 2022.
- Record on file since 1996, with 2 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 147 service lines.
Check whether Crystal Lake Water Supply serves your address
Health-based violations
Since October 2016Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.
| Contaminant | Rule family | Start date | Status | Acute |
|---|---|---|---|---|
|
Nitrite
Contaminant limit exceeded
Measured 1.426 mg/L, federal limit 1 mg/L (1.4 times the limit)
|
330 | Oct 1, 2022 | Resolved | Yes |
Full record since 1996
EPA's records for Crystal Lake Water Supply go back to 1996. Before October 19, 2016 they list 2 health-based violations (2 resolved) and 1 monitoring or reporting violation.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 2 | 1 |
| 2020s | 1 | 0 |
Most recent health-based violation before October 19, 2016: Total Coliform, began December 1996, Resolved.
Show all 2 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform
Contaminant limit exceeded
|
Dec 1, 1996 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Oct 1, 1996 | Resolved |
What the violations mean
Nitrite
1 incidentNitrite exceeded the federal limit
High nitrite is especially dangerous for infants under 6 months
Where the water comes from
Crystal Lake Water Supply draws water from 2 wells.
Annual water quality report
Crystal Lake Water Supply must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.
Systems serving 500 or fewer people may meet the rule by telling customers the report is available on request, so you may need to ask Crystal Lake Water Supply for a copy.
Find a posted report with EPA's Consumer Confidence Report search
Testing your own water
To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by Iowa.
Certified drinking water labs by state EPA guidance for private wells