EWG's drinking water quality report shows results of tests conducted by the water utility and provided to the Environmental Working Group by the Missouri Department of Natural Resources - Public Drinking Water Program, as well as information from the U.S. EPA Enforcement and Compliance History database (ECHO). For the latest quarter assessed by the EPA (July 2018 - September 2018), tap water provided by this water utility was in compliance with federal health-based drinking water standards.
Includes chemicals detected in 2015 for which annual utility averages exceeded an EWG-selected health guideline established by a federal or state public health authority; radiological contaminants detected between 2010 and 2015.
Chromium is a naturally occurring metal, but industrial uses can elevate its levels in water. One form, hexavalent chromium, causes cancer. Total chromium is not a good indicator of the amount of hexavalent chromium in drinking water.
How your levels compareThe State and National averages were calculated using the averages of the contaminant measurements for each utility in 2010-2015.
ppb = parts per billion.
Testing summary by quarter
ABOVE LEGAL LIMIT
- Utility Average 2010-2015: 0.770 ppb
- Health Guideline Exceeded 2010-2015: No
- Legal Limit Exceeded 2010-2015: No
2010 2011 2012 2013 2014 2015 0.770 ppb No No
Nitrate and nitrite✕
Nitrate and nitrite enter water from fertilizer runoff, septic tanks and urban runoff. These contaminants can cause oxygen deprivation for infants and increase the risk of cancer. Nitrite is significantly more toxic than nitrate. Click here to read more about nitrate.
How your levels compareThe State and National averages were calculated using the averages of the contaminant measurements for each utility in 2015.
ppm = parts per million.
Health risks of nitrate and nitrite in excess of health guideline
The health guideline of 5 ppm for nitrate and nitrite was defined by EWG based on studies by scientists at the National Cancer Institute and other independent researchers. This health guideline protects against cancer and harm to fetal growth and development.
Testing summary by quarter
ABOVE HEALTH GUIDELINE
ABOVE LEGAL LIMIT
- Utility Average 2015: 0.00750 ppm
- Health Guideline Exceeded 2015: No
- Legal Limit Exceeded 2015: No
2010 2011 2012 2013 2014 2015 0.00750 ppm No No
Includes chemicals detected in 2015 for which annual utility averages were lower than an EWG-selected health guideline established by a federal or state public health authority; chemicals detected under the EPA's Unregulated Contaminant Monitoring Rule (UCMR 3) program in 2013 to 2015, for which annual utility averages were lower than an EWG-selected health guideline established by a federal or state public health authority.
Click on each pollution source to see from which source contaminants come.
Silex compliance with legally mandated federal standards
- From October 2015 to September 2018, Silex complied with health-based drinking water standards.
- 12 QUARTERSin violation of any federal drinking water standard from October 2015 to September 2018
- Over the last 3 years this water utility has spent 4 QUARTERSin significant violation of federal drinking water standards
Other contaminants tested✕
Contaminants detected between 2010 and 2014 and were not part of EPA's UCMR-3 testing program:
Chemicals tested for but not detected from 2010 to 2015:
1,1,1,2-Tetrachloroethane, 1,1,1-Trichloroethane, 1,1,2,2-Tetrachloroethane, 1,1,2-Trichloroethane, 1,1-Dichloroethane, 1,1-Dichloroethylene, 1,1-Dichloropropene, 1,2,3-Trichlorobenzene, 1,2,3-Trichloropropane, 1,2,4-Trichlorobenzene, 1,2,4-Trimethylbenzene, 1,2-Dibromo-3-chloropropane (DBCP), 1,2-Dichloroethane, 1,2-Dichloropropane, 1,3,5-Trimethylbenzene, 1,3-Dichloropropane, 2,2-Dichloropropane, Aluminum, Antimony, Arsenic, Benzene, Beryllium, Bromobenzene, Bromochloroacetic acid, Bromochloromethane, Bromodichloroacetic acid, Bromomethane, Cadmium, Carbon tetrachloride, Chlorodibromoacetic acid, Chloroethane, Chloromethane, cis-1,2-Dichloroethylene, cis-1,3-Dichloropropene, Combined uranium, Dibromoacetic acid, Dibromomethane, Dichloroacetic acid, Dichlorodifluoromethane, Dichloromethane (methylene chloride), Ethylbenzene, Ethylene dibromide, Haloacetic acids (HAA5), Hexachlorobutadiene, Isopropylbenzene, m- & p-Xylene, m-Dichlorobenzene, Mercury (inorganic), Monobromoacetic acid, Monochloroacetic acid, Monochlorobenzene (chlorobenzene), MTBE, n-Butylbenzene, n-Propylbenzene, Naphthalene, o-Chlorotoluene, o-Dichlorobenzene, o-Xylene, p-Chlorotoluene, p-Dichlorobenzene, p-Isopropyltoluene, sec-Butylbenzene, Selenium, Silver, Styrene, tert-Butylbenzene, Tetrachloroethylene (perchloroethylene), Thallium, Toluene, Total trihalomethanes (TTHMs), trans-1,2-Dichloroethylene, trans-1,3-Dichloropropene, Tribromoacetic acid, Trichloroacetic acid, Trichloroethylene, Trichlorofluoromethane, Vinyl chloride, Xylenes (total)