Public water system record
Knierim Water Supply
Serves Knierim, Calhoun County, IA · 53 people served
Federal records show 8 health-based violations and no monitoring/reporting issues for Knierim 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
- 8
- Resolved
- 8
- Unresolved
- 0
- Any acute record
- Yes
- Monitoring issues, last 10 years
- 0
Key facts
- Knierim Water Supply draws water from 1 well.
- Highest measured level in the last 10 years: Nitrite, 2.0475 mg/L, federal limit 1 mg/L (2 times the limit), 2022.
- Most recent formal enforcement: compliance order (no penalty) by Iowa, February 2024.
- Record on file since 1987, with 1 health-based violation before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 33 service lines.
Check whether Knierim 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 1.7539 mg/L, federal limit 1 mg/L (1.8 times the limit)
|
330 | Aug 1, 2024 | Resolved | Yes |
|
Nitrite
Contaminant limit exceeded
Measured 1.1235 mg/L, federal limit 1 mg/L (1.1 times the limit)
|
330 | Jul 1, 2024 | Resolved | Yes |
|
Nitrite
Contaminant limit exceeded
Measured 1.951 mg/L, federal limit 1 mg/L (2 times the limit)
|
330 | Jan 1, 2023 | Resolved | Yes |
|
Nitrite
Contaminant limit exceeded
Measured 2.0475 mg/L, federal limit 1 mg/L (2 times the limit)
|
330 | Nov 1, 2022 | Resolved | Yes |
|
Nitrite
Contaminant limit exceeded
Measured 1.6 mg/L, federal limit 1 mg/L (1.6 times the limit)
|
330 | Oct 1, 2022 | Resolved | Yes |
|
Nitrite
Contaminant limit exceeded
Measured 1.157 mg/L, federal limit 1 mg/L (1.2 times the limit)
|
330 | Nov 1, 2020 | Resolved | Yes |
|
Nitrite
Contaminant limit exceeded
Measured 1.765 mg/L, federal limit 1 mg/L (1.8 times the limit)
|
330 | Oct 1, 2020 | Resolved | Yes |
|
Nitrite
Contaminant limit exceeded
Measured 1.5 mg/L, federal limit 1 mg/L (1.5 times the limit)
|
330 | Aug 1, 2019 | Resolved | Yes |
Full record since 1987
EPA's records for Knierim Water Supply go back to 1987. Before October 19, 2016 they list 1 health-based violation (1 resolved) and 2 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1980s | 0 | 1 |
| 2000s | 1 | 1 |
| October 19, 2016 to 2019 | 1 | 0 |
| 2020s | 7 | 0 |
Most recent health-based violation before October 19, 2016: Total Coliform, began July 2006, Resolved.
Show the health-based violation before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform
Contaminant limit exceeded
|
Jul 1, 2006 | Resolved |
Enforcement actions
Iowa regulators took 2 formal enforcement actions against Knierim Water Supply and issued 1 boil water order between 2006 and 2024, filed as 11 records in EPA's data. The most recent was a compliance order (no penalty) in February 2024.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Feb 8, 2024 | Iowa | Compliance order (no penalty) | 5 violations (5 health-based): Nitrite |
| Jan 23, 2023 | Iowa | Compliance order (no penalty) | 5 violations (5 health-based): Nitrite |
| Jul 21, 2006 | Iowa | Boil water order | 1 violation (1 health-based): Total Coliform |
What the violations mean
Nitrite
8 incidentsNitrite exceeded the federal limit
High nitrite is especially dangerous for infants under 6 months
Where the water comes from
Knierim Water Supply draws water from 1 well.
Annual water quality report
Knierim 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 Knierim 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