Public water system record
City of Oswego
Serves Oswego, Labette County, KS · 1,680 people served
Federal records show 2 health-based violations and 10 monitoring/reporting issues for City of Oswego in the last ten years. The most serious issue in this window was a resolved Chlorite violation.
System profile
- Health-based violations, last 10 years
- 2
- Resolved
- 2
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 10
Key facts
- City of Oswego draws water from 1 surface water intake.
- Highest measured level in the last 10 years: Chlorite, 3.1 mg/L, federal limit 1 mg/L (3.1 times the limit), 2018.
- Most recent formal enforcement: signed compliance agreement by Kansas, October 2005.
- Record on file since 1994, with 33 health-based violations before October 19, 2016.
Check whether City of Oswego 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 |
|---|---|---|---|---|
|
Chlorite
Contaminant limit exceeded
Measured 1.02 mg/L, federal limit 1 mg/L (at or just above the limit)
|
210 | Jul 1, 2021 | Resolved | No |
|
Chlorite
Contaminant limit exceeded
Measured 3.1 mg/L, federal limit 1 mg/L (3.1 times the limit)
|
210 | Mar 1, 2018 | Resolved | No |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Surface Water Treatment Rule
Monitoring and reporting
|
Aug 1, 2024 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
Jun 1, 2023 | Resolved |
|
Long Term 2 Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
May 1, 2019 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
May 1, 2019 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
Public Notice
OTHER
|
Jun 9, 2018 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Sep 28, 2017 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Mar 11, 2017 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Sep 29, 2016 | Resolved |
Full record since 1994
EPA's records for City of Oswego go back to 1994. Before October 19, 2016 they list 33 health-based violations (33 resolved) and 37 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 0 | 2 |
| 2000s | 27 | 32 |
| 2010 to October 18, 2016 | 6 | 3 |
| October 19, 2016 to 2019 | 1 | 7 |
| 2020s | 1 | 3 |
Most recent health-based violation before October 19, 2016: Haloacetic Acids (HAA5), began July 2014, Resolved.
Show all 33 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.064 mg/L, federal limit 0.06 mg/L (1.1 times the limit)
|
Jul 1, 2014 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Jul 1, 2013 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.084 mg/L, federal limit 0.06 mg/L (1.4 times the limit)
|
Jul 1, 2013 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.079 mg/L, federal limit 0.06 mg/L (1.3 times the limit)
|
Apr 1, 2013 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Apr 1, 2013 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.061 mg/L, federal limit 0.06 mg/L (at or just above the limit)
|
Apr 1, 2010 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.102 mg/L, federal limit 0.08 mg/L (1.3 times the limit)
|
Jan 1, 2008 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.133 mg/L, federal limit 0.08 mg/L (1.7 times the limit)
|
Oct 1, 2007 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.14 mg/L, federal limit 0.08 mg/L (1.8 times the limit)
|
Jul 1, 2007 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Apr 1, 2007 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.131 mg/L, federal limit 0.08 mg/L (1.6 times the limit)
|
Apr 1, 2007 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Jan 1, 2007 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.111 mg/L, federal limit 0.08 mg/L (1.4 times the limit)
|
Jan 1, 2007 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Oct 1, 2006 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.093 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
|
Oct 1, 2006 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Jul 1, 2006 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.101 mg/L, federal limit 0.08 mg/L (1.3 times the limit)
|
Jul 1, 2006 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Apr 1, 2006 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.147 mg/L, federal limit 0.08 mg/L (1.8 times the limit)
|
Apr 1, 2006 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Jan 1, 2006 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.149 mg/L, federal limit 0.08 mg/L (1.9 times the limit)
|
Jan 1, 2006 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 148 µg/L, federal limit 80 µg/L (1.9 times the limit)
|
Oct 1, 2005 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 158 µg/L, federal limit 80 µg/L (2 times the limit)
|
Jul 1, 2005 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 102.5 µg/L, federal limit 60 µg/L (1.7 times the limit)
|
Apr 1, 2005 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 163 µg/L, federal limit 80 µg/L (2 times the limit)
|
Apr 1, 2005 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 160 µg/L, federal limit 60 µg/L (2.7 times the limit)
|
Jan 1, 2005 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 185.5 µg/L, federal limit 80 µg/L (2.3 times the limit)
|
Jan 1, 2005 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 192.5 µg/L, federal limit 80 µg/L (2.4 times the limit)
|
Oct 1, 2004 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 192.5 µg/L, federal limit 60 µg/L (3.2 times the limit)
|
Oct 1, 2004 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 140 µg/L, federal limit 60 µg/L (2.3 times the limit)
|
Jul 1, 2004 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 152.5 µg/L, federal limit 80 µg/L (1.9 times the limit)
|
Jul 1, 2004 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 90 µg/L, federal limit 60 µg/L (1.5 times the limit)
|
Apr 1, 2004 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 90 µg/L, federal limit 80 µg/L (1.1 times the limit)
|
Apr 1, 2004 | Resolved |
Enforcement actions
Kansas regulators took 1 formal enforcement action against City of Oswego in 2005, filed as 2 records in EPA's data. The most recent was a signed compliance agreement in October 2005.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Oct 18, 2005 | Kansas | Signed compliance agreement | 56 violations (28 health-based): Interim Enhanced Surface Water Treatment Rule, CARBON, TOTAL, Haloacetic Acids (HAA5), Total Trihalomethanes (TTHMs), Public Notice |
What the violations mean
Chlorite
2 incidentsTest results for Chlorite were above the federal limit (a maximum contaminant level violation).
The utility had to notify customers about each of these violations.
Where the water comes from
City of Oswego draws water from 1 surface water intake. 1 other community water system buys water from City of Oswego.
Community systems that buy water from it
- Labette Co RWD 1C Oswego, KS
Annual water quality report
City of Oswego 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.
Where the state allows it, systems serving fewer than 10,000 people may publish the report in a local newspaper or news site instead of mailing it, and must provide a copy on request.
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 Kansas.
Certified drinking water labs by state EPA guidance for private wells