Public water system record
Twin Valley Lakes Improvement Assn
Serves an area of Johnson County, IA that includes Solon · 100 people served
Federal records show no health-based violations and 7 monitoring/reporting issues for Twin Valley Lakes Improvement Assn in the last ten years.
System profile
- Health-based violations, last 10 years
- 0
- Resolved
- 0
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 7
Key facts
- Twin Valley Lakes Improvement Assn draws water from 1 well.
- Most recent formal enforcement: signed compliance agreement by Iowa, October 2010.
- Record on file since 1985, with 12 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 43 service lines.
Check whether Twin Valley Lakes Improvement Assn 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.
None since October 2016.
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Jul 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Jul 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2022 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2021 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Jun 1, 2020 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Sep 1, 2019 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Dec 1, 2018 | Resolved |
Full record since 1985
EPA's records for Twin Valley Lakes Improvement Assn go back to 1985. Before October 19, 2016 they list 12 health-based violations (12 resolved) and 11 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1980s | 0 | 9 |
| 1990s | 3 | 1 |
| 2000s | 8 | 0 |
| 2010 to October 18, 2016 | 1 | 1 |
| October 19, 2016 to 2019 | 0 | 2 |
| 2020s | 0 | 5 |
Most recent health-based violation before October 19, 2016: Total Coliform, began July 2010, Resolved.
Show all 12 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform
Contaminant limit exceeded
|
Jul 1, 2010 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Sep 1, 2009 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Aug 1, 2009 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jul 1, 2008 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Aug 1, 2004 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jul 1, 2004 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Mar 1, 2004 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Aug 1, 2003 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jul 1, 2002 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Sep 1, 1995 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jul 1, 1993 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Apr 1, 1993 | Resolved |
Enforcement actions
Iowa regulators took 2 formal enforcement actions against Twin Valley Lakes Improvement Assn between 1992 and 2010, filed as 13 records in EPA's data. The most recent was a signed compliance agreement in October 2010.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Oct 12, 2010 | Iowa | Signed compliance agreement | 3 violations (3 health-based): Total Coliform |
| Apr 14, 1992 | Iowa | Compliance order with a penalty | 17 violations: Cadmium, Mercury, Fluoride, Arsenic, Lead and Copper Rule |
Where the water comes from
Twin Valley Lakes Improvement Assn draws water from 1 well.
Annual water quality report
Twin Valley Lakes Improvement Assn 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 Twin Valley Lakes Improvement Assn 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