Our Findings

Listed are substances detected in Greenville Utilities’ treated water during 2016, unless otherwise noted. Not listed are substances that were tested for (i.e., MTBE, mercury, petroleum products, etc.) but were not detected. Scroll to bottom for Glossary.

Beta Emitters

(pCi/L) Decay of natural and man-made radioactive deposits. Last analyzed in 2015.

Highest Level Allowed [MCL]: 50.0
Highest Level Detected: 18.0
Range Detected: 18.0 – 4.0
(Highest and Lowest Site Values)
Ideal Goals [MCLG]: 0

Bromate

(ppb) By-product of drinking water disinfection.

Highest Level Allowed [MCL]: 10.0
(Running Annual Avg.)
Highest Level Detected: 1.0
(Running Annual Avg.)
Range Detected: 2.0 – <1.0
(Highest and Lowest Site Values)
Ideal Goals [MCLG]: 0

Chloramines

(ppm) Water additive used to control microbes.

Highest Level Allowed [MCL]: 4.0
(Running Annual Avg.)
Highest Level Detected: 2.9
(System Avg.)
Range Detected: 4.6 – 1.1
(Highest and Lowest Site Values)
Ideal Goals [MCLG]: 4.0

Chlorine

(ppm) Water additive used to control microbes.

Highest Level Allowed [MCL]: 4.0
(Running Annual Avg.)
Highest Level Detected: 2.0
(System Avg.)
Range Detected: 4.0 – 0.7
(Highest and lowest site values)
Ideal Goals [MCLG]: 4.0

Copper

(ppm) Occurs naturally in soil, but can be present in drinking water due corrosion of private household plumbing.

Highest Level Allowed [MCL]: 1.3
(Action Level)
Highest Level Detected: 0.2
(90th Percentile)
Range Detected: No sample site exceeded the action level.
Ideal Goals [MCLG]: 1.3

Flouride

(ppm) Naturally occurring mineral; also added to water to promote dental health.

Highest Level Allowed [MCL]: 4.0
Highest Level Detected: 1.2
Range Detected: 1.2 – 0.5
Ideal Goals [MCLG]: 4.0

Haloacetic Acid

(ppb) By-product of drinking water chlorination.

Highest Level Allowed [MCL]: 60.0
(Locational Running Annual Avg.)
Highest Level Detected: 33.0
(Highest Locational Running Annual Avg.)
Range Detected: 60.0 – 15.0
(Highest and lowest site values)
Ideal Goals [MCLG]: n/a

Lead

(ppb) Occurs naturally in soil, but can be present in drinking water due corrosion of private household plumbing.*

Highest Level Allowed [MCL]: 15.0
(Action Level)
Highest Level Detected: <3.0
(90th Percentile)
Range Detected: No sample site exceeded the action level.
Ideal Goals [MCLG]: 0

Total Coliform

(3 Total Coliform detected) Naturally present in the environment.

Highest Level Allowed [MCL]: Presence of coliform bacteria in <5.0% of monthly samples.
Highest Level Detected: 1.0%
Range Detected: n/a
Ideal Goals [MCLG]: 0

Total Organic Carbon Raw

(ppm) Naturally present in the environment.

Highest Level Allowed [MCL]: TT
Highest Level Detected: 12.5
Range Detected: 12.5 – 6.4
(Highest and Lowest Site Values)
Ideal Goals [MCLG]: n/a

Total Organic Carbon Treated

(ppm) Naturally present in the environment.

Highest Level Allowed [MCL]: TT
Highest Level Detected: 3.7
Range Detected: 3.7 – 2.4
(Highest and Lowest Site Values)
Ideal Goals [MCLG]: n/a

Trihalomethanes

(ppb) By-product of drinking water chlorination.

Highest Level Allowed [MCL]: 80.0
(Locational Running Annual Avg.)
Highest Level Detected: 34.0
(Highest Locational Running Annual Avg.)
Range Detected: 70.0 – 12.0
(Highest and Lowest Site Values)
Ideal Goals [MCLG]: n/a

Turbidity

(NTU) A measure of cloudiness in water. It may be caused by inorganic soil particles or fragments of organic matter that can interfere with treatment.

Highest Level Allowed [MCL]: 1.0 and 95% of samples below 0.3 (TT)
Highest Level Detected: 0.18 and 100% of samples below 0.3 (TT)
Range Detected: n/a
Ideal Goals [MCLG]: 0.3

Cryptosporidium (oocyst) Raw Water

Animal waste, sewage.

Highest Level Allowed [MCL]: TT
Highest Level Detected: 1.0
Range Detected: 2 out of 12 samples.
Ideal Goals [MCLG]: 0

*Note on Lead

If present, elevated levels of lead can cause serious health problems, especially for pregnant women and young children. Lead in drinking water is primarily from materials and components associated with service lines and home plumbing. Greenville Utilities is responsible for providing high quality drinking water, but can not control the variety of materials used in plumbing components. When your water has been sitting for several hours, you can minimize the potential for lead exposure by flushing your tap for 30 seconds to 2 minutes before using water for drinking or cooking. If you are concerned about lead in your water, you may wish to have your water tested. Information on lead in drinking water, testing methods, and steps you can take to minimize exposure is available from the Safe Drinking Water Hotline or at http://www.epa.gov.safewater/lead.

Glossary

Action Level – The concentration of a contaminant which, if exceeded, triggers additional treatment measures by the public water system.

Locational Running Annual Average – The average of sample analytical results for samples taken at a particular monitoring location during the previous four calendar quarters under the Stage 2 Disinfectants and Disinfection Byproducts Rule.

Maximum Contaminant Level (MCL) – The highest level of a contaminant allowed in drinking water. MCLs are set as close to the MCLGs as feasible using the best available treatment technique.

Maximum Contaminant Level Goal (MCLG) – The level of a contaminant in drinking water below which there is no known or expected risk to health. MCLGs allow for a margin of safety.

Nephelometric Turbidity Units (NTU) – Turbidity is a measure of cloudiness in water.

Ninetieth Percentile – The concentration value exceeding the lower ninety percent of samples analyzed and exceeded by the upper ten percent.

Parts Per Billion (ppb) – One part per billion is comparable to one minute in two thousand years or one penny in $10,000,000.

Parts Per Million (ppm) – Equivalent to milligrams per liter. One part per million is comparable to one minute in two years, or one penny out of $10,000.

Picocuries Per Liter (pCi/L) – A measurement of radioactivity per liter.

Treatment Techniques (TT) – A required process intended to reduce the level of contaminants.

> – is greater than; < – is less than.