Public water system record
City of Rockville
Serves Rockville, Montgomery County, MD · 52,000 people served
Federal records show no health-based violations and 16 monitoring/reporting issues for City of Rockville 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
- 16
Key facts
- City of Rockville draws water from 1 surface water intake.
- Record on file since 1993, with 1 health-based violation before October 19, 2016.
- Lead pipe inventory: 0 lead and 8,298 unknown out of 8,298 service lines.
Check whether City of Rockville 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 |
|---|---|---|
|
LEAD AND COPPER RULE REVISIONS
RPT
|
Jul 2, 2025 | Resolved |
|
Chlordane
Monitoring and reporting
|
Jul 1, 2023 | Resolved |
|
Benzo(a)pyrene
Monitoring and reporting
|
Jul 1, 2023 | Resolved |
|
HEXACHLOROBENZENE
Monitoring and reporting
|
Jul 1, 2023 | Resolved |
|
Heptachlor epoxide
Monitoring and reporting
|
Jul 1, 2023 | Resolved |
|
Heptachlor
Monitoring and reporting
|
Jul 1, 2023 | Resolved |
|
LASSO
Monitoring and reporting
|
Jul 1, 2023 | Resolved |
|
Atrazine
Monitoring and reporting
|
Jul 1, 2023 | Resolved |
|
Hexachlorocyclopentadiene
Monitoring and reporting
|
Jul 1, 2023 | Resolved |
|
Di(2-ethylhexyl) phthalate
Monitoring and reporting
|
Jul 1, 2023 | Resolved |
|
Simazine
Monitoring and reporting
|
Jul 1, 2023 | Resolved |
|
Di(2-ethylhexyl) adipate
Monitoring and reporting
|
Jul 1, 2023 | Resolved |
|
Toxaphene
Monitoring and reporting
|
Jul 1, 2023 | Resolved |
|
Methoxychlor
Monitoring and reporting
|
Jul 1, 2023 | Resolved |
|
BHC-GAMMA
Monitoring and reporting
|
Jul 1, 2023 | Resolved |
|
Endrin
Monitoring and reporting
|
Jul 1, 2023 | Resolved |
Full record since 1993
EPA's records for City of Rockville go back to 1993. Before October 19, 2016 they list 1 health-based violation (1 resolved) and 71 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 0 | 21 |
| 2000s | 1 | 49 |
| 2010 to October 18, 2016 | 0 | 1 |
| 2020s | 0 | 16 |
Most recent health-based violation before October 19, 2016: Total Trihalomethanes (TTHMs), began October 2008, Resolved.
Show the health-based violation before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 82.4 µg/L, federal limit 80 µg/L (at or just above the limit)
|
Oct 1, 2008 | Resolved |
Where the water comes from
City of Rockville draws water from 1 surface water intake. It also has an emergency connection to Washington Suburban Sanitary Commission.
Emergency or part-time connections to
- Washington Suburban Sanitary Commission Laurel, MD
Annual water quality report
City of Rockville 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 Maryland.
Certified drinking water labs by state EPA guidance for private wells