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Public water system record

Nolensville-College Grove U.D.

Serves an area of Williamson County, TN that includes Nolensville and Brentwood · 32,793 people served

Federal records show no health-based violations and no monitoring or reporting issues for Nolensville-College Grove U.D. in the last ten years.

  • TN0000511
  • NOLENSVILLE
  • TN
  • 32,793 served

System profile

Source water Purchased surface water
ZIP 37135
EPA system ID TN0000511

Verify this system on EPA ECHO →

Health-based violations, last 10 years
0
Resolved
0
Unresolved
0
Any acute record
No
Monitoring issues, last 10 years
0

Key facts

  • Nolensville-College Grove U.D. buys its water from Smyrna Water System and Mallory Valley U.D.
  • Most recent formal enforcement: signed compliance agreement by Tennessee, May 1994.
  • Record on file since 1990, with 8 health-based violations before October 19, 2016.
  • Lead pipe inventory: 0 lead and 0 unknown out of 11,234 service lines.

Check whether Nolensville-College Grove U.D. serves your address

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Health-based violations

Since October 2016

Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.

None since October 2016, and no monitoring or reporting violations either.

Full record since 1990

EPA's records for Nolensville-College Grove U.D. go back to 1990. Before October 19, 2016 they list 8 health-based violations (3 resolved, 5 archived by EPA without a recorded fix) and 9 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
1990s 3 5
2000s 2 2
2010 to October 18, 2016 3 2

Most recent health-based violation before October 19, 2016: Total Trihalomethanes (TTHMs), began April 2015, Resolved.

Show all 8 health-based violations before October 19, 2016
Contaminant Start date Status
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.081 mg/L, federal limit 0.08 mg/L (at or just above the limit)
 Apr 1, 2015 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.0925 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
 Jul 1, 2014 Resolved
Total Coliform
Contaminant limit exceeded
 Nov 1, 2010 Resolved
Total Coliform
Contaminant limit exceeded
 Oct 1, 2001 Archived
Total Coliform
Contaminant limit exceeded
 Jun 1, 2001 Archived
Total Coliform
Contaminant limit exceeded
 Dec 1, 1990 Archived
Total Coliform
Contaminant limit exceeded
 Nov 1, 1990 Archived
Total Coliform
Contaminant limit exceeded
 Sep 1, 1990 Archived

Enforcement actions

Tennessee regulators took 1 formal enforcement action against Nolensville-College Grove U.D. in 1994, filed as 2 records in EPA's data. The most recent was a signed compliance agreement in May 1994.

Date By Action Violations covered
May 2, 1994 Tennessee Signed compliance agreement 2 violations: Lead and Copper Rule

Where the water comes from

Nolensville-College Grove U.D. buys its water from Smyrna Water System and Mallory Valley U.D. It lists no wells or intakes of its own. It also has seasonal connections to Metro Water Services and Brentwood Water Department and an emergency connection to Milcrofton Utility District. 1 other community water system buys water from Nolensville-College Grove U.D.

Buys water from

Emergency or part-time connections to

Community systems that buy water from it

Annual water quality report

Nolensville-College Grove U.D. 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 Tennessee.

Certified drinking water labs by state EPA guidance for private wells