Water Quality Data Table

The tables below list all of the drinking water contaminants that we detected during the calendar year of this report. The presence of contaminants in the water does not necessarily indicate that the water poses a health risk. Unless otherwise noted, the data presented in this table is from testing done in the calendar year of the report. The EPA or the State requires us to monitor for certain contaminants less than once per year because the concentrations of these contaminants do not change frequently.

 

 

 

Testing Results for Gardnerville Water Company

 

 

 

Microbiological

Result

MCL

MCLG

Typical Source

COLIFORM (TCR)

In the month of November  1 sample returned as positive

MCL: Systems that Collect less than 40 Samples per Month – No more than 1 positive monthly sample

0

Naturally present in the environment

 

 

 

 

 

Disinfection By-Products

Monitoring
 Period

RAA

Range

Unit

MCL

MCLG

Typical Source

No Detected Results were Found in the Calendar Year of 2015

 

 

 

Lead and Copper

   Date

90th
Percentile

95th
Percentile

Range

Unit

AL

Sites
Over ALL

Typical Source

COPPER

2013

0.43

0.44

ppm

1.3

0

Corrosion of household plumbing systems; Erosion of natural deposits; leaching from wood preservatives.

LEAD

2013

3

1.3

ppb

15

0

Corrosion of household plumbing systems; Erosion of natural deposits.

 

 

 

Regulated Contaminants

    Collection
    Date

Highest
Value

Range

Unit

MCL

MCLG

Typical Source

BARIUM

12/7/2010

.22

0.098-0.22

ppm

2

2

Discharge of drilling wastes; Discharge from metal refineries; Erosion of natural deposits

FLUORIDE

4/1/2013

0.11

0.11

ppm

2

4

Natural Deposits; Water additive which promotes strong teeth.

NITRATE

4/18/2015

2.7

1.0 – 2.7

ppm

10

10

Runoff from fertilizer use; Leaching from septic tanks, sewage; Erosion of natural deposits.

 

               

 

Radionuclides

Collection
Date

Highest
Value

Range

Unit

MCL

MCLG

Typical Source

COMBINED URANIUM

4/1/2013

8.0

1.3-8.0

pCi/L

30

0

Erosion of natural deposits

GROSS ALPHA, ADJUSTED

1/9/2007

3.6

0.5-3.6

pCi/L

15

0

Erosion of natural deposits

GROSS ALPHA, Incl.

Radon & Uranium

9/15/2011

1.1

1.1-1.1

pCi/L

15

0

Decay of natural and man-made deposits

GROSS BETA PARTICLE ACTIVITY

1/10/2007

4.6

4.4-4.6

pCi/L

50

0

Decay of natural and man-made deposits

 

 

 

 

 

Secondary Contaminants

Collection
Date

Highest
Value

Range

Unit

MCL

MCLG

Typical Source

CHLORIDE

4/1/2013

13

5.4-13

mg/L

250

COLOR

4/1/2013

5

5

CU

15

IRON

4/1/2013

0.18

0.085-0.18

mg/L

0.3

MAGNESIUM

4/1/2013

20

8.6-20

mg/L

150

Ph

4/1/2013

7.67

6.98-7.67

pH

8.5

SODIUM

4/1/2013

26

17-26

mg/L

200

20

SULFATE

4/1/2013

34

20-34

mg/L

250

TDS

4/1/2013

340

180-340

Mg/L

500

 

ZINC

4/1/2013

340

180-340

mg/L

500

Calcium

4/7/2014

71

28-71

mg/L

 

Hardness, Total (AS CACO3)

4/7/2014

260

110-260

MG/L

 

Magnesium

4/7/2014

20

8.4-20

Mg/L

150

                 

 

                                                               

 

Violations

 

During the 2015 calendar year, GWC had no violations to report.  

 

 

Unit Description

Term

Definition

ug/L

ug/L: Number of micrograms of substance in one liter of water

ppm

ppm: Parts per million, or milligrams per liter (mg/L)

ppb

ppb: Parts per billion, or micrograms per liter (mg/L)

Positive samples/month

Positive samples/month: Number of samples taken monthly that were found to be positive

NA

NA: Not applicable

ND

ND: Not detected

NR

NR: Monitoring not required, but recommended