Tap Truth EPA drinking water records, in plain English

Public water system record

Harris County MUD 105

Serves an area of Harris County, TX · 14,925 people served

Federal records show no health-based violations and 1 monitoring/reporting issue for Harris County MUD 105 in the last ten years. At least one of these issues remains unresolved.

  • TX1011227
  • HOUSTON
  • TX
  • 14,925 served

System profile

Source water Purchased surface water
ZIP 77019
EPA system ID TX1011227

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
1

Key facts

  • Harris County MUD 105 draws water from 4 wells.
  • Most recent formal enforcement: signed compliance agreement by Texas, October 2010.
  • Record on file since 2003, with 18 health-based violations before October 19, 2016.
  • Lead pipe inventory: 0 lead and 0 unknown out of 4,571 service lines.

Check whether Harris County MUD 105 serves your address

Address suggestions by Mapbox

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.

Monitoring and reporting issues

Since October 2016

Missed tests or reports, not contaminants found above a limit.

Issue Start date Status
Public Notice
OTHER
 Mar 1, 2010 Active

Full record since 2003

EPA's records for Harris County MUD 105 go back to 2003. Before October 19, 2016 they list 18 health-based violations (18 resolved) and 8 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
2000s 4 2
2010 to October 18, 2016 14 6

Most recent health-based violation before October 19, 2016: Arsenic, began October 2011, Resolved.

Show all 18 health-based violations before October 19, 2016
Contaminant Start date Status
Arsenic
Contaminant limit exceeded
Measured 0.013 mg/L, federal limit 0.01 mg/L (1.3 times the limit)
 Oct 1, 2011 Resolved
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 18 pCi/L, federal limit 15 pCi/L (1.2 times the limit)
 Jul 1, 2011 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.011 mg/L, federal limit 0.01 mg/L (1.1 times the limit)
 Jul 1, 2011 Resolved
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 19 pCi/L, federal limit 15 pCi/L (1.3 times the limit)
 Apr 1, 2011 Resolved
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
 Jan 1, 2011 Resolved
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 19 pCi/L, federal limit 15 pCi/L (1.3 times the limit)
 Jan 1, 2011 Resolved
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
 Oct 1, 2010 Resolved
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 23 pCi/L, federal limit 15 pCi/L (1.5 times the limit)
 Oct 1, 2010 Resolved
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
 Jul 1, 2010 Resolved
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 22 pCi/L, federal limit 15 pCi/L (1.5 times the limit)
 Jul 1, 2010 Resolved
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
 Apr 1, 2010 Resolved
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 23 pCi/L, federal limit 15 pCi/L (1.5 times the limit)
 Apr 1, 2010 Resolved
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
 Jan 1, 2010 Resolved
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 23 pCi/L, federal limit 15 pCi/L (1.5 times the limit)
 Jan 1, 2010 Resolved
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 17 pCi/L, federal limit 15 pCi/L (1.1 times the limit)
 Oct 1, 2009 Resolved
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 18 pCi/L, federal limit 15 pCi/L (1.2 times the limit)
 Jul 1, 2009 Resolved
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 16 pCi/L, federal limit 15 pCi/L (1.1 times the limit)
 Apr 1, 2009 Resolved
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 16 pCi/L, federal limit 15 pCi/L (1.1 times the limit)
 Oct 1, 2008 Resolved

Enforcement actions

Texas regulators took 1 formal enforcement action against Harris County MUD 105 in 2010. The most recent was a signed compliance agreement in October 2010.

Date By Action Violations covered
Oct 13, 2010 Texas Signed compliance agreement 2 violations (2 health-based): Gross Alpha, Excl. Radon and U

Where the water comes from

Harris County MUD 105 draws water from 4 wells. It also buys water from West Harris County Regional Water Author. It also has emergency connections to Harris County MUD 165, Harris County MUD 157 and Harris County MUD 167. 1 other community water system buys water from Harris County MUD 105. 2 other public water systems have emergency connections to Harris County MUD 105.

Buys water from

Emergency or part-time connections to

Community systems that buy water from it

Annual water quality report

Harris County MUD 105 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 Texas.

Certified drinking water labs by state EPA guidance for private wells