Your Water Is Safe To Drink! - Snohomish County PUD

6 – Snohomish County PUD Integrated Water System
Snohomish County PUD • 2010 Annual Water Quality Report
The Creswell, Dubuque, Lake Roesiger and Storm Lake Systems are also supplied water from the City of Everett; however, the
systems are not hydraulically linked, which makes them separate or isolated systems. Therefore, in addition to the testing
results found on page 5, the PUD collects supplementary compliance samples as shown in the following tables.
water conservation tip
LAWNS
To reduce evaporation, water the lawn in the
morning or evening. Avoid watering during the
heat of the day or when it is windy.
dubuque water system
The Dubuque system supplies water to just over 1,000 connections in the Dubuque/Dutch Hill area. The water serving this area is purchased directly from
the City of Everett; one tap is on Everett’s No. 3 pipeline, and two taps are on Everett’s No. 5 pipeline. The Dubuque system will ultimately be incorporated
into the PUD’s integrated system.
EPA Regulations
Your Water Testing Results
Ideal Level/ Maximum Min./Max. Average
Substance Major Source Units Goal (MCLG) Allowable (MCL) Range Value Comply?
Total Coliform Bacteria Naturally present in the environment Samples 0 1 positive 0% 0% YES
positive
per month
Total coliform bacteria testing is used to monitor microbial quality in the water distribution system. The PUD collects three coliform samples per month. No unsatisfactory results were
detected in 2010.
Haloacetic Acids By-product of drinking water chlorination ppb N/A 60 3.8 – 40.7 28.1 YES
Total Trihalomethanes By-product of drinking water chlorination ppb N/A 80 33.0 – 47.2 37.9 YES
Free Chlorine Residual Measure of disinfectant added to water ppm 4 (MRDLG) 4 (MRDL) 0.5 – 0.9 0.7 YES
Haloacetic Acids and Trihalomethanes form as by-products of the chlorination process that is used to kill or inactivate disease-causing microbes.
UNREGULATED SUBSTANCES
creswell water system
The Creswell system supplies water to 15 connections along Dubuque Road and Creswell Road. Water is purchased directly from the City of Everett with
taps on Everett’s No. 2 and No. 3 pipelines.
EPA Regulations
Your Water Testing Results
Ideal Level/ Maximum Min./Max. Average
Substance Major Source Units Goal (MCLG) Allowable (MCL) Range Value Comply?
Total Coliform Bacteria Naturally present in the environment % positive 0 1 positive 0% 0% YES
per month
Total coliform bacteria testing is used to monitor microbial quality in the water distribution system. The PUD collects one coliform sample per month. No unsatisfactory results were detected
in 2010.
Haloacetic Acids By-product of drinking water chlorination (ppb) N/A 60 21.7 – 38.6 32.1 YES
Total Trihalomethanes By-product of drinking water chlorination (ppb) N/A 80 33.0 – 40.8 39.1 YES
Free Chlorine Residual Measure of disinfectant added to water (ppm) 4 (MRDLG) 4 (MRDL) 0.3 – 0.8 0.5 YES
Haloacetic Acids and Trihalomethanes form as by-products of the chlorination process that is used to kill or inactivate disease-causing microbes.
UNREGULATED SUBSTANCES
Ideal Your Water Testing Results
Level/Goal Min./Max. Average
Substance (MCLG) Range Value
Bromodichloromethane 1 (ppb) 0 1.6 – 2.0 1.7
Chloroform (trichloromethane) 1 (ppb) 70 31.4 – 39.1 35.6
Dichloroacetic Acid 1 (ppb) 0 11.0 – 17.2 14.7
Trichloroacetic Acid 1 (ppb) 300 10.7 – 21.1 15.9
Monochloroacetic Acid 1 (ppb) 70 3.0 – 3.1 3.1
1
These substances are by-products of the chlorine disinfection process and were monitored
quarterly during 2010 to determine compliance with the Stage 1 Disinfectants/Disinfection
By-products Rule regulation.
Ideal Your Water Testing Results
Level/Goal Min./Max. Average
Substance (MCLG) Range Value
Bromodichloromethane 1 (ppb) 0 1.5 – 2.4 1.8
Chloroform (trichloromethane) 1 (ppb) 70 31.4 – 44.8 36.5
Dichloroacetic Acid 1 (ppb) 0 1.5 – 16.4 12.0
Trichloroacetic Acid 1 (ppb) 300 2.3 – 23.2 14.4
Monochloroacetic Acid 1 (ppb) 70 2.9 – 3.4 3.1
1
These substances are by-products of the chlorine disinfection process and were monitored
quarterly during 2010 to determine compliance with the Stage 1 Disinfectants/Disinfection
By-products Rule regulation.
water conservation tip
RECYCLE
Never pour water down the drain when there
may be another use for it. Use it to water your
indoor plants or garden.