Example: tourism industry

DENR ADMINISTRATIVE ORDER NO. 26-A Series 1994 Subject ...

PRIME-M4 Page 1 of 14 DENR ADMINISTRATIVE ORDERNO. 26-ASeries 1994 Subject :PHILIPPINE STANDARDS FOR DRINKING WATER1993 UNDER THE PROVISION OF CHAPTER II,SECTION 9 OF PD 856, OTHERWISE KNOWN AS THECODE ON SANITATION OF THE implement the provisions of section 9, otherwise known as the PrescribedStandards and Procedures of Chapter ll of the Code on Sanitation of the Philippines, PD856, this Philippine National Standards for Drinking Water 1993 hereby revises andupdates the 1978 National Standards for Drinking Philippine National Standards for Drinking Water 1993 (PNSDW 1993)is designed to guide the Waterworks Officials, Developers and Operators of WaterSupply Systems both Government and Private entities, health and sanitation authoritiesand the general public and all other new standards cover requirements for the acceptable values of thedetermined parameters in measuring water quality.

Hydrogen Sulfide Iron Manganese pH Sodium Sulfate Total Dissolved Solids Zinc Unobjectionable Unobjectionable 5 TCU 5 NTU 0.2 250 1 300 (as CaCo3) * 0.05 1 0.5 6.5 - 8.5 200 * 250 500 5 * Table 3.5 Standard Values for Disinfectants and Disinfectant By - Products Constituents Maximum Level (mg/L) a. Disinfectant Chlorine (residual) b ...

Tags:

  Sodium, Hydrogen, Hydrogen sulfide, Sulfide

Information

Domain:

Source:

Link to this page:

Please notify us if you found a problem with this document:

Other abuse

Transcription of DENR ADMINISTRATIVE ORDER NO. 26-A Series 1994 Subject ...

1 PRIME-M4 Page 1 of 14 DENR ADMINISTRATIVE ORDERNO. 26-ASeries 1994 Subject :PHILIPPINE STANDARDS FOR DRINKING WATER1993 UNDER THE PROVISION OF CHAPTER II,SECTION 9 OF PD 856, OTHERWISE KNOWN AS THECODE ON SANITATION OF THE implement the provisions of section 9, otherwise known as the PrescribedStandards and Procedures of Chapter ll of the Code on Sanitation of the Philippines, PD856, this Philippine National Standards for Drinking Water 1993 hereby revises andupdates the 1978 National Standards for Drinking Philippine National Standards for Drinking Water 1993 (PNSDW 1993)is designed to guide the Waterworks Officials, Developers and Operators of WaterSupply Systems both Government and Private entities, health and sanitation authoritiesand the general public and all other new standards cover requirements for the acceptable values of thedetermined parameters in measuring water quality.

2 These parameters includemicrobiological, physical, chemical and radiological compositions of the water. Thestandard also delineates values established in conforming with the medical and healthimplication of the parameters as opposed to values established purely to satisfyaesthetic 1. DEFINITION OF TERMS1. Aesthetic - aspects of drinking water quality perceived by senses, including odor,taste, color and Aerobe - An organism capable of growing in the presence of Aerobic - Description of biological or chemical processes that can occur only inpresence of Anaerobic - Life processes or chemical reactions that occur in the absence ofoxygen or a condition in which Dissolved Oxygen (DO), is not detectable in theaquatic Available residual Chlorine - Generally refers to the part of the chlorine that willwith orthotolidine or ampero-metric tests and exhibits significant Bottled water - means water that is placed in a sealed container or package and isoffered for sale for human consumption as 2 of 147.

3 Coliform Organism (total coliforms) - refers to any rod- shaped, non-spore-forming, gram negative bacteria capable of growth in the presence of bile salts, orother surface-active agents with similar growth-inhibiting properties which arecytochrome-oxidase negative and able to ferment lactose at either 35 or 37 C withthe production of acid, gas and aldehyde within 24-48 Composite Sample - refers to a mixture of grab samples collected at the samesampling points at different Contamination - A general term referring to the introduction of materials notnormally found in water that make the water less desirable or unfit for its Disinfection - Water treatment processes designed to destroy disease - causingmicro-organisms. The efficacy of disinfection is often assessd by measuring thecoliform group of indicator Drinking Water - Water intended for direct human consumption or for use in foodpreparation.

4 Where high quality waters are scarce, the quality of water used forother domestic purposes does not need to be as high as that of drinking Facultative anaerobic - Organisms that can use free oxygen or can grow in theabsence of atmospheric oxygen13. Facultative bacteria - Bacteria that can adapt themselves to growth andmetabolism under aerobic or anaerobic conditions. Many organism of interest inwastewater stabilization are among this Thermotolerant (Fecal) Coliform - A subgroup of coliform bacteria that has highpositive correlation with fecal contamination associated with all warm bloodedanimals. These organisms can ferment lactose at C and produce gas in amultiple tube procedure (EC - Confirmation) or acidity with the Membrane Filterprocedure (M-FC Medium).15. Gram or Catch Sample - A sample collected at a particular time and place andcan represent only the composition of the source at the time and Grab-negative bacteria - Bacteria that decolorize and accept that safranin stainwhich appears pink using the gram-stain Gross alpha and gross beta radioactivity - Radio activity emanating fromradionuclides belonging to the uranium, thorium and actinium Series which areterrestrial in origin.

5 It also includes radionuclides that occur singly and areproduced by cosmic rays and are terrestrial in Integrated Samples - For certain purposes, the information needed is providedanalyzing mixtures of grab samples collected from different pointssimultaneously,or as nearly as Large Water Supply System - more than 5,000 service 3 of 1420. Level l (Point source) - a protected well or a developed spring with an outlet butwithout a distribution system, generally adaptable for rural areas where the housesare thinly scattered. A level l facility normally serves around 15 to 25 householdsand its outreach must not be more than 250 meters from the farthest user. Theyeild or discharge is generally from 40 to 140 liters per Level ll (Communal Faucet System or Standposts)-A system composed of asource, a reservoir, a piped distribution network and communal faucets, located atnot more than 25 meters from the farthest house.

6 The system is designed todeliver 40-80 liters of water per capita per day to an average of 100 households,with one faucet per 4 to 6 households. Generally suitable for rural and urban areaswhere houses are clustered densely to justify a simple piped Level lll (Waterworks System or Individual House Connections) - a systemwith a source, a reservoir, a piped distribution network and household taps. It isgenerally suited for densely populated urban areas. This level of facility requires aminimum treatment of MPN (Most Probable Number) - A statistical method of determining microbialpopulations. A multiple dilution tube technique is utilized with a standard mediumand observations are made for specific individual tube effects. Resultant coding istranslated by mathematical probability tables into population Non-spore forming - not capable of producing spores, the defense mechanism ofbacteria under favorable growth conditions such as heat, drying, pH change, Pollutant - Dredged spoil, solid waste, incinerator residue, sewage, garbage,sewage sludge, munitions, chemical waste, biological materials, radioactivematerials, heat, wrecked or discarded equipment, rock sand and industrial,municipal, agricultural waste discharge into Potable water - water suitable (from both health and aesthetic considerations)

7 Fordrinking and cooking Protected well - it is a borehole well either deep or shallow well which havesanitary protective measures such as concrete apron, grouting, safe distances totoilets and other source of Radioactivity - the spontaneous emission of radiation, generally alpha or betaparticles often accompanied by gamma rays, from the nucleus of an Raw water - untreated, undisinfected surface or Residual Clorine - when sufficient dosage of chlorine is applied to water, micro-organisms of sanitary significance are destroyed and all the oxidizable matter arereacted upon. After all of these reactions have taken place, at the end of aspecified contact time, there remains a certain minute quantity of chlorine in thewater. This is detected as residual chlorine, Its presence in water is usually anindication, and is therefore an assurance of protection of the bacteriological 4 of 1431.

8 Small Water Supply System - less than 1,000 service Standard Methods - Methods of analysis prescribed by a joint action of AmericanPublic Health Association, American Waterworks Association, Water PollutionControl Federation or US Environmental Pollution Control Federation or USEnvironmental Protection Agency. Methods accepted by Water Quality - from the user's point of view the term "water quality" is used todefine those bacteriological, chemical, physical, biological or radiologicalcharacterestics which evaluates the acceptability of the water. The term "quality"must be considered relative to the proposed use of the Water Quality Guideline - a water guideline in this document is a level for a waterconstituent which does not result in significant health risk and which ensuresaesthetically acceptable Water Supplier - an entity government or private responsible for sourcedevelopment, water abstraction, treatment and distribution of 2.

9 EXAMINATION OF WATERR egular examination of water will have to be carried out in ORDER to determine results of this examination shall be expressed as follows:a) BacteriologicalMultiple Tube FermentationMPN/100mL; or absence or absenceof coliform organismsMembrane Filter Colonies / 100mLMMO-MUG(Auto-analysis Colilert)presence or absence of coliformorganismsb)Biological Counts /mLc)Chemical mg/L or unless otherwise statedd)Physical as appropriatee)Radiological Becquerel/Liter (Bq/L)Adequate treatment will have to be made available to deal with changes in thequality of the raw water and to consistently produce a finished product which is 5 of 14 Microbiological testing may be supplemented with the much simpler colorimetrictest for free residual chlorine (free residual chlorine of - mg/L in the distributionsystem to reduce the risk of microbial regrowth).

10 Absence of the residual chlorine isindicator of the entry of oxidizable matter into the distribution system, or a malfunctioningof the treatment 3. STANDARD PARAMETERS AND VALUES FOR DRINKING-WATER QUALITYT able Standard Values for Bacteriological QualitySource and Mode ofSupplyBacteriaStandard Value(No. / 100mL)a. All drinking-watersupplies under allcircumstances (Level l,ll, lll, Bottled water andEmergency WaterSupplies)E. Coli or Thermotolerant(fecal) coliform bacteria0b. Treated water enteringthe distribution systemE. Coli or Thermotolerant(fecal) coliform bacterialTotal Coliforms00c. Treated water in thedistribution systemE. Coli or Thermotolerant(fecal) coliform bacteriaTotal Coliforms0 Must not bedetectable in any100mL sample. Incase of large supplieswhere sufficientsamples areexamined, it must notbe present in 95% ofsamples takenthroughout anytwelve month periodPRIME-M4 Page 6 of 14 Table Standard Value for Biological OrganismsConstituentsPermissible LimitTotal Count/mL10 Table Standard Values for Physical and Chemical Quality:Health SignificanceA.