Introduction to Private Waters

Missouri Department of Health and Senior Services

Program Authority19 CSR 20-3.040 “Environmental Health Standard for the Control of Communicable disease”19 CSR 20-3.050 “Sanitation and Safety Standards for Lodging Establishments”19 CSR 20-1.025 “Missouri Food Code”19 CSR 20-1.040 “Good Manufacturing Practices”30 CSR 60, 61, and 62: Child care licensing rules

IntroductionTypes of Water SuppliesWell ConstructionWater SamplesDisinfectionRegulated Facilities

Objective/GoalsRecognize the different supply types and well typesBecome familiar with the different tests available through the State Public Health LaboratoryInterpret resultsMake recommendations based on test results

Supply Types

Public vs. Private

Types of Drinking Water Systems

C o m m u n ity W a te r S y stem 15 or m ore service connections

or serves at leas t 25 o r m ore p e o p le o n a y e a r rou n d b a s is

T r a n sie n t N on c o m m u n ityW a te r S y stem

15 serv ice connections o r at leas t25 D IF F E RE N T persons for at leas t 60 days

N o n tr a n sie n t N o n co m m u n ityW a te r S y stem

15 serv ice connections or 25 o r m oreS A M E persons daily fo r at leas t 6 m onths/yr

N o n co m m u n ityW a te r S y stem

P u b lic W a terS y ste m s

P r iv a teD o m es tic W e lls

P ro v id e s w a te r to fe w e r th an 2 5 p e op le o n pe rm a n e ntb a s is a nd p ro d uc e s le ss th a n 7 0g a l/m in.

M u lt i F a m ilyW e lls

m o re th an 3 d w e lling s , less th a n 15 se v icec o n n e c tio n s, se rv e s le ss th a n 2 5 p e rso n s 6 0 d a ys o u t o f y e ar

P r iv a te W a terS y ste m s

D r in k in g W a terS y ste m s

Private Used By General Public

Do not fit DNR Non-Community criteriaUsed by general publicRegulated by DHSS or LPHA

Well Construction

Well Construction Types

DrilledDrivenSpringBoredDug

Below Surface Construction

CasingScreeningPump

Surface Construction

Cross-section view of well at surface

Well Certification

All private wells drilled after Oct. 1987Proof of certification must be provided to us for wells regulated by DHSS drilled after Oct 1987.Well drillers are regulated by DNR.

What tests can we run?

ChemicalBacteriological

Bacteriological Water Testing

WhatWhenWhereHow

When do we take a water sample?

RequestResult of a disease investigationRoutine inspection

What Happens When The Results are Unsatisfactory?

DisinfectionChlorinationChlorination orChlorination

http://www.youtube.com/watch?v=MZJ6FxK6cwk

Methods of ChlorinationShock chlorinationContinuous Feed Chlorination

ChlorinationUse method recognized by DNR for PublicMinimum 0.5 ppm free chlorine addedMinimum 0.2 ppm chlorine in system30 minute retention time based on pump capacityPositive feed (not drop feed or erosion)

What we doCheck surface construction and setback distancesTroubleshoot systemsCollect water samples (bacterial and chemical)Distribute sample collection bottlesMake recommendations based on EPA, DHSS, and DNR regulations and policies

Questions?