Public water system record
Mount Prospect
Serves Mount Prospect, Cook County, IL · 41,000 people served
Federal records show no health-based violations and 9 monitoring/reporting issues for Mount Prospect in the last ten years. At least one of these issues remains unresolved.
System profile
- Health-based violations, last 10 years
- 0
- Resolved
- 0
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 9
Key facts
- Mount Prospect buys its water from Northwest Suburban Municipal Jawa.
- Record on file since 1977, with 1 health-based violation before October 19, 2016.
- Lead pipe inventory: 700 lead and 65 unknown out of 11,654 service lines.
Check whether Mount Prospect 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 |
|---|---|---|
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2025 | Active |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2025 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Dec 1, 2024 | Resolved |
|
Benzene
Monitoring and reporting
|
Jul 1, 2024 | Resolved |
|
Ethylbenzene
Monitoring and reporting
|
Jul 1, 2024 | Resolved |
|
Toluene
Monitoring and reporting
|
Jul 1, 2024 | Resolved |
|
Xylenes, Total
Monitoring and reporting
|
Jul 1, 2024 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Dec 30, 2020 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2017 | Resolved |
Full record since 1977
EPA's records for Mount Prospect go back to 1977. Before October 19, 2016 they list 1 health-based violation (1 archived by EPA without a recorded fix) and 3 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1970s | 0 | 1 |
| 1990s | 1 | 1 |
| 2010 to October 18, 2016 | 0 | 1 |
| October 19, 2016 to 2019 | 0 | 1 |
| 2020s | 0 | 8 |
Most recent health-based violation before October 19, 2016: Total Coliform, began October 1992, Archived.
Show the health-based violation before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform
Contaminant limit exceeded
|
Oct 1, 1992 | Archived |
Where the water comes from
Mount Prospect buys its water from Northwest Suburban Municipal Jawa. EPA also lists 4 wells, all for emergency, seasonal or other part-time use. 1 smaller public system such as schools, businesses or campgrounds buys water from Mount Prospect. 3 other public water systems have emergency connections to Mount Prospect.
Buys water from
- Northwest Suburban Municipal Jawa Elk Grove Village, IL
Annual water quality report
Mount Prospect 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 10,000 or more people must mail or deliver the report to every customer, and from 2027 they must send it twice a year.
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 Illinois.
Certified drinking water labs by state EPA guidance for private wells