williamson, TX
Total Incidents:
230
Last Incident:
July 01, 2018
Note: Just because the latest incident is in 2017 or 2018 doesn’t mean your water is free of contaminants! There is a considerable lag between when data is collected and when it is published by the EPA.
Contaminants
Fluoride
161
Incidents
Coliform (TCR)
47
Incidents
TTHM
20
Incidents
Total Haloacetic Acids (HAA5)
2
Incidents
Fluoride
Description
Fluoride compounds are salts that form when the element, fluorine, combines with minerals in soil or rocks. Many communities add fluoride to their drinking water to promote dental health.
Health Effects
Bone disease (pain and tenderness of the bones); Children may get mottled teeth
Coliform (TCR)
Description
Coliforms are bacteria that are naturally present in the environment and used as an indicator that other, potentially harmful, bacteria may be present. Coliforms found in more samples than allowed is a warning of potential problems.
Health Effects
Not a health threat in itself; it is used to indicate whether other potentially harmful bacteria may be present5
TTHM
Description
Trihalomethanes occur when naturally-occurring organic and inorganic materials in the water react with the disinfectants, chlorine and chloramine.
Health Effects
Liver, kidney or central nervous system problems; increased risk of cancer
Total Haloacetic Acids (HAA5)
Description
Haloacetic acids occur when naturally-occurring organic and inorganic materials in the water react with the disinfectants, chlorine and chloramine.
Health Effects
Increased risk of cancer
All Incidents
| Water System | Type | Measure | Violation | Effects | Begin Date |
|---|---|---|---|---|---|
| JONAH WATER SUD | TTHM | MCL, Average | Maximum Contaminant Level Violation | Liver, kidney or central nervous system problems; increased risk of cancer | 2018-07-01 |
| JONAH WATER SUD | TTHM | MCL, Average | Maximum Contaminant Level Violation | Liver, kidney or central nervous system problems; increased risk of cancer | 2018-07-01 |
| JONAH WATER SUD | TTHM | MCL, Average | Maximum Contaminant Level Violation | Liver, kidney or central nervous system problems; increased risk of cancer | 2018-07-01 |
| JONAH WATER SUD | TTHM | MCL, Average | Maximum Contaminant Level Violation | Liver, kidney or central nervous system problems; increased risk of cancer | 2018-07-01 |
| SONTERRA MUD | Fluoride | MCL, Average | Maximum Contaminant Level Violation | Bone disease (pain and tenderness of the bones); Children may get mottled teeth | 2017-04-01 |
| SONTERRA MUD | Fluoride | MCL, Average | Maximum Contaminant Level Violation | Bone disease (pain and tenderness of the bones); Children may get mottled teeth | 2017-04-01 |
| SONTERRA MUD | Fluoride | MCL, Average | Maximum Contaminant Level Violation | Bone disease (pain and tenderness of the bones); Children may get mottled teeth | 2017-04-01 |
| SONTERRA MUD | Fluoride | MCL, Average | Maximum Contaminant Level Violation | Bone disease (pain and tenderness of the bones); Children may get mottled teeth | 2017-04-01 |
| SONTERRA MUD | Fluoride | MCL, Average | Maximum Contaminant Level Violation | Bone disease (pain and tenderness of the bones); Children may get mottled teeth | 2017-01-01 |
| SONTERRA MUD | Fluoride | MCL, Average | Maximum Contaminant Level Violation | Bone disease (pain and tenderness of the bones); Children may get mottled teeth | 2017-01-01 |
| SONTERRA MUD | Fluoride | MCL, Average | Maximum Contaminant Level Violation | Bone disease (pain and tenderness of the bones); Children may get mottled teeth | 2017-01-01 |
| SONTERRA MUD | Fluoride | MCL, Average | Maximum Contaminant Level Violation | Bone disease (pain and tenderness of the bones); Children may get mottled teeth | 2017-01-01 |
| CHAPARRAL III | Fluoride | MCL, Average | Maximum Contaminant Level Violation | Bone disease (pain and tenderness of the bones); Children may get mottled teeth | 2016-04-01 |
| CHAPARRAL III | Fluoride | MCL, Average | Maximum Contaminant Level Violation | Bone disease (pain and tenderness of the bones); Children may get mottled teeth | 2016-04-01 |
| CHAPARRAL III | Fluoride | MCL, Average | Maximum Contaminant Level Violation | Bone disease (pain and tenderness of the bones); Children may get mottled teeth | 2016-04-01 |
| CHAPARRAL III | Fluoride | MCL, Average | Maximum Contaminant Level Violation | Bone disease (pain and tenderness of the bones); Children may get mottled teeth | 2016-04-01 |
| CHAPARRAL III | Fluoride | MCL, Average | Maximum Contaminant Level Violation | Bone disease (pain and tenderness of the bones); Children may get mottled teeth | 2016-04-01 |
| CHAPARRAL III | Fluoride | MCL, Average | Maximum Contaminant Level Violation | Bone disease (pain and tenderness of the bones); Children may get mottled teeth | 2016-01-01 |
| CHAPARRAL III | Fluoride | MCL, Average | Maximum Contaminant Level Violation | Bone disease (pain and tenderness of the bones); Children may get mottled teeth | 2016-01-01 |
| CHAPARRAL III | Fluoride | MCL, Average | Maximum Contaminant Level Violation | Bone disease (pain and tenderness of the bones); Children may get mottled teeth | 2016-01-01 |
| CHAPARRAL III | Fluoride | MCL, Average | Maximum Contaminant Level Violation | Bone disease (pain and tenderness of the bones); Children may get mottled teeth | 2016-01-01 |
| CHAPARRAL III | Fluoride | MCL, Average | Maximum Contaminant Level Violation | Bone disease (pain and tenderness of the bones); Children may get mottled teeth | 2016-01-01 |
| JONAH WATER SUD | TTHM | MCL, Average | Maximum Contaminant Level Violation | Liver, kidney or central nervous system problems; increased risk of cancer | 2015-10-01 |
| CITY OF TAYLOR | Coliform (TCR) | MCL, Monthly (TCR) | Maximum Contaminant Level Violation | Not a health threat in itself; it is used to indicate whether other potentially harmful bacteria may be present5 | 2015-10-01 |
| JONAH WATER SUD | TTHM | MCL, Average | Maximum Contaminant Level Violation | Liver, kidney or central nervous system problems; increased risk of cancer | 2015-10-01 |
| CHAPARRAL III | Fluoride | MCL, Average | Maximum Contaminant Level Violation | Bone disease (pain and tenderness of the bones); Children may get mottled teeth | 2015-10-01 |
| JONAH WATER SUD | TTHM | MCL, Average | Maximum Contaminant Level Violation | Liver, kidney or central nervous system problems; increased risk of cancer | 2015-10-01 |
| CITY OF TAYLOR | Coliform (TCR) | MCL, Monthly (TCR) | Maximum Contaminant Level Violation | Not a health threat in itself; it is used to indicate whether other potentially harmful bacteria may be present5 | 2015-10-01 |
| CITY OF TAYLOR | Coliform (TCR) | MCL, Monthly (TCR) | Maximum Contaminant Level Violation | Not a health threat in itself; it is used to indicate whether other potentially harmful bacteria may be present5 | 2015-10-01 |
| CHAPARRAL III | Fluoride | MCL, Average | Maximum Contaminant Level Violation | Bone disease (pain and tenderness of the bones); Children may get mottled teeth | 2015-10-01 |
| CITY OF TAYLOR | Coliform (TCR) | MCL, Monthly (TCR) | Maximum Contaminant Level Violation | Not a health threat in itself; it is used to indicate whether other potentially harmful bacteria may be present5 | 2015-10-01 |
| JONAH WATER SUD | TTHM | MCL, Average | Maximum Contaminant Level Violation | Liver, kidney or central nervous system problems; increased risk of cancer | 2015-10-01 |
| JONAH WATER SUD | TTHM | MCL, Average | Maximum Contaminant Level Violation | Liver, kidney or central nervous system problems; increased risk of cancer | 2015-10-01 |
| CHAPARRAL III | Fluoride | MCL, Average | Maximum Contaminant Level Violation | Bone disease (pain and tenderness of the bones); Children may get mottled teeth | 2015-10-01 |
| JONAH WATER SUD | TTHM | MCL, Average | Maximum Contaminant Level Violation | Liver, kidney or central nervous system problems; increased risk of cancer | 2015-10-01 |
| CHAPARRAL III | Fluoride | MCL, Average | Maximum Contaminant Level Violation | Bone disease (pain and tenderness of the bones); Children may get mottled teeth | 2015-10-01 |
| JONAH WATER SUD | TTHM | MCL, Average | Maximum Contaminant Level Violation | Liver, kidney or central nervous system problems; increased risk of cancer | 2015-07-01 |
| JONAH WATER SUD | TTHM | MCL, Average | Maximum Contaminant Level Violation | Liver, kidney or central nervous system problems; increased risk of cancer | 2015-07-01 |
| CHAPARRAL III | Fluoride | MCL, Average | Maximum Contaminant Level Violation | Bone disease (pain and tenderness of the bones); Children may get mottled teeth | 2015-07-01 |
| CHAPARRAL III | Fluoride | MCL, Average | Maximum Contaminant Level Violation | Bone disease (pain and tenderness of the bones); Children may get mottled teeth | 2015-07-01 |
| JONAH WATER SUD | TTHM | MCL, Average | Maximum Contaminant Level Violation | Liver, kidney or central nervous system problems; increased risk of cancer | 2015-07-01 |
| CHAPARRAL III | Fluoride | MCL, Average | Maximum Contaminant Level Violation | Bone disease (pain and tenderness of the bones); Children may get mottled teeth | 2015-07-01 |
| JONAH WATER SUD | TTHM | MCL, Average | Maximum Contaminant Level Violation | Liver, kidney or central nervous system problems; increased risk of cancer | 2015-07-01 |
| JONAH WATER SUD | TTHM | MCL, Average | Maximum Contaminant Level Violation | Liver, kidney or central nervous system problems; increased risk of cancer | 2015-07-01 |
| CHAPARRAL III | Fluoride | MCL, Average | Maximum Contaminant Level Violation | Bone disease (pain and tenderness of the bones); Children may get mottled teeth | 2015-07-01 |
| JONAH WATER SUD | TTHM | MCL, Average | Maximum Contaminant Level Violation | Liver, kidney or central nervous system problems; increased risk of cancer | 2015-07-01 |
| CITY OF TAYLOR | Coliform (TCR) | MCL, Monthly (TCR) | Maximum Contaminant Level Violation | Not a health threat in itself; it is used to indicate whether other potentially harmful bacteria may be present5 | 2015-05-01 |
| CITY OF TAYLOR | Coliform (TCR) | MCL, Monthly (TCR) | Maximum Contaminant Level Violation | Not a health threat in itself; it is used to indicate whether other potentially harmful bacteria may be present5 | 2015-05-01 |
| CITY OF TAYLOR | Coliform (TCR) | MCL, Monthly (TCR) | Maximum Contaminant Level Violation | Not a health threat in itself; it is used to indicate whether other potentially harmful bacteria may be present5 | 2015-05-01 |
| CITY OF TAYLOR | Coliform (TCR) | MCL, Monthly (TCR) | Maximum Contaminant Level Violation | Not a health threat in itself; it is used to indicate whether other potentially harmful bacteria may be present5 | 2015-05-01 |
| CHAPARRAL III | Fluoride | MCL, Average | Maximum Contaminant Level Violation | Bone disease (pain and tenderness of the bones); Children may get mottled teeth | 2015-04-01 |
| CITY OF HUTTO | Coliform (TCR) | MCL, Monthly (TCR) | Maximum Contaminant Level Violation | Not a health threat in itself; it is used to indicate whether other potentially harmful bacteria may be present5 | 2015-04-01 |
| CITY OF HUTTO | Coliform (TCR) | MCL, Monthly (TCR) | Maximum Contaminant Level Violation | Not a health threat in itself; it is used to indicate whether other potentially harmful bacteria may be present5 | 2015-04-01 |
| CITY OF HUTTO | Coliform (TCR) | MCL, Monthly (TCR) | Maximum Contaminant Level Violation | Not a health threat in itself; it is used to indicate whether other potentially harmful bacteria may be present5 | 2015-04-01 |
| CHAPARRAL III | Fluoride | MCL, Average | Maximum Contaminant Level Violation | Bone disease (pain and tenderness of the bones); Children may get mottled teeth | 2015-04-01 |
| CHAPARRAL III | Fluoride | MCL, Average | Maximum Contaminant Level Violation | Bone disease (pain and tenderness of the bones); Children may get mottled teeth | 2015-04-01 |
| CITY OF HUTTO | Coliform (TCR) | MCL, Monthly (TCR) | Maximum Contaminant Level Violation | Not a health threat in itself; it is used to indicate whether other potentially harmful bacteria may be present5 | 2015-04-01 |
| CHAPARRAL III | Fluoride | MCL, Average | Maximum Contaminant Level Violation | Bone disease (pain and tenderness of the bones); Children may get mottled teeth | 2015-04-01 |
| CHAPARRAL III | Fluoride | MCL, Average | Maximum Contaminant Level Violation | Bone disease (pain and tenderness of the bones); Children may get mottled teeth | 2015-01-01 |
| CITY OF CEDAR PARK | TTHM | MCL, Average | Maximum Contaminant Level Violation | Liver, kidney or central nervous system problems; increased risk of cancer | 2015-01-01 |
| CITY OF CEDAR PARK | TTHM | MCL, Average | Maximum Contaminant Level Violation | Liver, kidney or central nervous system problems; increased risk of cancer | 2015-01-01 |
| CHAPARRAL III | Fluoride | MCL, Average | Maximum Contaminant Level Violation | Bone disease (pain and tenderness of the bones); Children may get mottled teeth | 2015-01-01 |
| CITY OF CEDAR PARK | TTHM | MCL, Average | Maximum Contaminant Level Violation | Liver, kidney or central nervous system problems; increased risk of cancer | 2015-01-01 |
| CHAPARRAL III | Fluoride | MCL, Average | Maximum Contaminant Level Violation | Bone disease (pain and tenderness of the bones); Children may get mottled teeth | 2015-01-01 |
| CHAPARRAL III | Fluoride | MCL, Average | Maximum Contaminant Level Violation | Bone disease (pain and tenderness of the bones); Children may get mottled teeth | 2015-01-01 |
| CITY OF CEDAR PARK | TTHM | MCL, Average | Maximum Contaminant Level Violation | Liver, kidney or central nervous system problems; increased risk of cancer | 2015-01-01 |
| CITY OF BARTLETT | Coliform (TCR) | MCL, Monthly (TCR) | Maximum Contaminant Level Violation | Not a health threat in itself; it is used to indicate whether other potentially harmful bacteria may be present5 | 2014-11-01 |
| CITY OF BARTLETT | Coliform (TCR) | MCL, Monthly (TCR) | Maximum Contaminant Level Violation | Not a health threat in itself; it is used to indicate whether other potentially harmful bacteria may be present5 | 2014-11-01 |
| CITY OF BARTLETT | Coliform (TCR) | MCL, Monthly (TCR) | Maximum Contaminant Level Violation | Not a health threat in itself; it is used to indicate whether other potentially harmful bacteria may be present5 | 2014-11-01 |
| CITY OF BARTLETT | Coliform (TCR) | MCL, Monthly (TCR) | Maximum Contaminant Level Violation | Not a health threat in itself; it is used to indicate whether other potentially harmful bacteria may be present5 | 2014-11-01 |
| CITY OF BARTLETT | Coliform (TCR) | MCL, Monthly (TCR) | Maximum Contaminant Level Violation | Not a health threat in itself; it is used to indicate whether other potentially harmful bacteria may be present5 | 2014-11-01 |
| CITY OF BARTLETT | Coliform (TCR) | MCL, Monthly (TCR) | Maximum Contaminant Level Violation | Not a health threat in itself; it is used to indicate whether other potentially harmful bacteria may be present5 | 2014-11-01 |
| CHAPARRAL III | Fluoride | MCL, Average | Maximum Contaminant Level Violation | Bone disease (pain and tenderness of the bones); Children may get mottled teeth | 2014-10-01 |
| CHAPARRAL III | Fluoride | MCL, Average | Maximum Contaminant Level Violation | Bone disease (pain and tenderness of the bones); Children may get mottled teeth | 2014-10-01 |
| CHAPARRAL III | Fluoride | MCL, Average | Maximum Contaminant Level Violation | Bone disease (pain and tenderness of the bones); Children may get mottled teeth | 2014-10-01 |
| CHAPARRAL III | Fluoride | MCL, Average | Maximum Contaminant Level Violation | Bone disease (pain and tenderness of the bones); Children may get mottled teeth | 2014-10-01 |
| NOACK WSC | Coliform (TCR) | MCL, Monthly (TCR) | Maximum Contaminant Level Violation | Not a health threat in itself; it is used to indicate whether other potentially harmful bacteria may be present5 | 2014-08-01 |
| NOACK WSC | Coliform (TCR) | MCL, Monthly (TCR) | Maximum Contaminant Level Violation | Not a health threat in itself; it is used to indicate whether other potentially harmful bacteria may be present5 | 2014-08-01 |
| NOACK WSC | Coliform (TCR) | MCL, Monthly (TCR) | Maximum Contaminant Level Violation | Not a health threat in itself; it is used to indicate whether other potentially harmful bacteria may be present5 | 2014-08-01 |
| NOACK WSC | Coliform (TCR) | MCL, Monthly (TCR) | Maximum Contaminant Level Violation | Not a health threat in itself; it is used to indicate whether other potentially harmful bacteria may be present5 | 2014-08-01 |
| CHAPARRAL III | Fluoride | MCL, Average | Maximum Contaminant Level Violation | Bone disease (pain and tenderness of the bones); Children may get mottled teeth | 2014-07-01 |
| CHAPARRAL III | Fluoride | MCL, Average | Maximum Contaminant Level Violation | Bone disease (pain and tenderness of the bones); Children may get mottled teeth | 2014-07-01 |
| CHAPARRAL III | Fluoride | MCL, Average | Maximum Contaminant Level Violation | Bone disease (pain and tenderness of the bones); Children may get mottled teeth | 2014-07-01 |
| CHAPARRAL III | Fluoride | MCL, Average | Maximum Contaminant Level Violation | Bone disease (pain and tenderness of the bones); Children may get mottled teeth | 2014-07-01 |
| CITY OF TAYLOR | Coliform (TCR) | MCL, Monthly (TCR) | Maximum Contaminant Level Violation | Not a health threat in itself; it is used to indicate whether other potentially harmful bacteria may be present5 | 2014-06-01 |
| CITY OF TAYLOR | Coliform (TCR) | MCL, Monthly (TCR) | Maximum Contaminant Level Violation | Not a health threat in itself; it is used to indicate whether other potentially harmful bacteria may be present5 | 2014-06-01 |
| CITY OF TAYLOR | Coliform (TCR) | MCL, Monthly (TCR) | Maximum Contaminant Level Violation | Not a health threat in itself; it is used to indicate whether other potentially harmful bacteria may be present5 | 2014-06-01 |
| CITY OF TAYLOR | Coliform (TCR) | MCL, Monthly (TCR) | Maximum Contaminant Level Violation | Not a health threat in itself; it is used to indicate whether other potentially harmful bacteria may be present5 | 2014-06-01 |
| WILLIAMSON COUNTY WSID 3 | Coliform (TCR) | MCL, Monthly (TCR) | Maximum Contaminant Level Violation | Not a health threat in itself; it is used to indicate whether other potentially harmful bacteria may be present5 | 2014-05-01 |
| WILLIAMSON COUNTY WSID 3 | Coliform (TCR) | MCL, Monthly (TCR) | Maximum Contaminant Level Violation | Not a health threat in itself; it is used to indicate whether other potentially harmful bacteria may be present5 | 2014-05-01 |
| WILLIAMSON COUNTY WSID 3 | Coliform (TCR) | MCL, Monthly (TCR) | Maximum Contaminant Level Violation | Not a health threat in itself; it is used to indicate whether other potentially harmful bacteria may be present5 | 2014-05-01 |
| WILLIAMSON COUNTY WSID 3 | Coliform (TCR) | MCL, Monthly (TCR) | Maximum Contaminant Level Violation | Not a health threat in itself; it is used to indicate whether other potentially harmful bacteria may be present5 | 2014-05-01 |
| CHAPARRAL III | Fluoride | MCL, Average | Maximum Contaminant Level Violation | Bone disease (pain and tenderness of the bones); Children may get mottled teeth | 2014-04-01 |
| CHAPARRAL III | Fluoride | MCL, Average | Maximum Contaminant Level Violation | Bone disease (pain and tenderness of the bones); Children may get mottled teeth | 2014-04-01 |
| CHAPARRAL III | Fluoride | MCL, Average | Maximum Contaminant Level Violation | Bone disease (pain and tenderness of the bones); Children may get mottled teeth | 2014-04-01 |
| CHAPARRAL III | Fluoride | MCL, Average | Maximum Contaminant Level Violation | Bone disease (pain and tenderness of the bones); Children may get mottled teeth | 2014-04-01 |
| CHAPARRAL III | Fluoride | MCL, Average | Maximum Contaminant Level Violation | Bone disease (pain and tenderness of the bones); Children may get mottled teeth | 2014-04-01 |
| CHAPARRAL III | Fluoride | MCL, Average | Maximum Contaminant Level Violation | Bone disease (pain and tenderness of the bones); Children may get mottled teeth | 2014-01-01 |
| CHAPARRAL III | Fluoride | MCL, Average | Maximum Contaminant Level Violation | Bone disease (pain and tenderness of the bones); Children may get mottled teeth | 2014-01-01 |
| CHAPARRAL III | Fluoride | MCL, Average | Maximum Contaminant Level Violation | Bone disease (pain and tenderness of the bones); Children may get mottled teeth | 2014-01-01 |