HomeMy WebLinkAbout11-19-2018 WRC Public Drinking Water - L. CameronThank you to Dr.
John Snow
Over 1400 cases, 82 deaths
Salmonella Typhi contaminated Six Mile Creek
One of the 10 deadliest outbreaks in U.S. history
Bacteria
Viruses
Protozoa
Cattle near a
shallow water well
Heavy rains
Then contamination
with Camploybacter
Colorless, odorless, tasteless
Naturally occurring
Known human carcinogen
Increases risk of cardiovascular disease,
diabetes,…
MCL = 10 mg/L (lowered from 50 mg/L in
2006)
Surface water contains organic matter that
reacts with disinfectants such as chlorine
Produces TTHMs and HAA5 –
◦Potential carcinogens
◦May cause reproductive or developmental effects
Concentrations generally increase the longer
the water stays in water pipes
Regulations have recently become stricter
Lead
◦Found in lead pipes and the solder used in pipes
before 1986
◦In children, causes delays in physical and mental
development
◦MCL = 15 ug/L = 15 ppb in water supplies
Nitrate
◦Presence associated with agricultural
◦Monitored and not a public water concern
◦May be present in individual wells
◦MCL = 10 mg/L or 10 ppm
Public Water System:
◦A system which provides piped water to the
public for human consumption, if such system
has at least five service connections or
regularly serves an average of at least 25
individuals daily at least 60 days out of the
year.
Municipal Water
And, if not on municipal water:
◦Mobile Home Parks
◦Schools
◦Factories
◦Restaurants
◦Hotels and Motels
◦Campgrounds
◦Convenience Stores
About 150 public water supplies in Tompkins
Community Water System
Non-Community Water System
◦Transient Non-Community Water System
◦Non-Transient Non-Community Water
System
Monthly Operation Reports
Sampling
E Coli MCL violation
Nitrate/Nitrate MCL violation
Acute Chlorine Dioxide Maximum Residual
Disinfection Level (MRDL) violation
Certain Turbidity Level violations
Hazardous or toxic chemical contamination
Inadequate disinfection
Other violation (e.g. –unapproved source)
Tier 1: within 24 hours of a public health
hazard
Tier 2: within 30 days for a violation with the
potential to have serious adverse effects after
long-term exposure (this includes most MCL
violations that are not public health hazards)
Tier 3: within one year for less serious
violations (includes most monitoring
violations)
Description of the Violation
Any potential adverse health effects
The population at risk
Whether alternative water supplies
should be used
What actions consumers should take
What is being done to correct the
violation
How long it will last
UCMR 1 UCMR 2 UCMR3
2,4-Dinitrotoluene 1,2-Diphenylbrazine 1,2,3-trichloropropane
2,6-Dinitrotoluene Diazinon Methyl bromide
Acetochlor Disulfoton Methyl chloride
DCPA mono-acid degradable Fonofos HALON 1011
DCPA di-acid degradable Nitrobenzine HCFC-22
4,4'-DDE Prometon 1,3-butadiene
EPTC Terbutos 1,1-dichloroethane
Nitrobenzene 2-Methylphenol 1,4-dioxane
Perchlorate 2,4-Dinitrophenol Vanadium
Terbacil 2,4,6-Tricholorphenol Molybdenum
Diuron Cobalt
Linuron Strontium
Chromium1
Chrominum6
Chlorate
PFOS
PFOA
PFBS
PFHxS
PFHpA
PFNA
Wash
your
hands!