GB/T 25499-2010The reuse of urban recycling water - Water quality standard for green space irrigation (English PDF)

Foreword

This Standard is one of series of standards of "the reuse of urban recycling water".

1 Scope

This Standard specifies the water quality indicators and limits, sampling and monitoring for green space irrigation of reuse of urban recycling water.

This Standard is applicable to the recycled water used for green space irrigation that takes the urban recycling water as water source.

2 Normative references

The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

GB/T 5750 (all parts), Standard examination methods for drinking water

GB/T 6920, Water quality - Determination of pH value - Glass electrode method

GB/T 7467, Water quality - Determination of chromium(6) - 1.5 Diphenylcarbahydrazide spectrophotometric method

GB/T 7468, Water quality - Determination of total mercury - Cold atomic absorption spectrophotometry

GB/T 7470, Water quality - Determination of lead - Spectrophotometric method with dithizone

GB/T 7471, Water quality - Determination of cadmium - Spectrophotometric method with dithizone

GB/T 7472, Water quality - Determination of zinc - Spectrophotometric method with dithizone

GB/T 7473, Water quality - Determination of copper - 2,9-Dimethyl-1,10-phenanthroline spectrophotometric method

GB/T 7474, Water quality - Determination of copper - Sodium diethyldithiocarbamate spectrophotometric method

GB/T 7475, Water quality - Determination of copper, zinc, lead and cadmium - Atomic absorption spectrometry

GB/T 7476, Water quality - Determination of calcium - EDTA titrimetric method

GB/T 7479, Water quality - Determination of ammonium - Nessler's reagent colorimetric method

GB/T 7481, Water quality - Determination of ammonium - Spectrophotometric method with salicylic acid

GB/T 7483, Water quality - Determination of fluoride; Fluor reagent spectrophotometric method

GB/T 7484, Water quality - Determination of fluoride - ion selective electrode method

GB/T 7485, Water quality - Determination of total arsenic - Silver diethyldithiocarbamate spectrophotometric method

GB/T 7486, Water quality - Determination of cyanide - Part 1. Determination of total cyanide

GB/T 7487, Water quality - Determination of cyanide - Part 2. Determination of cyanide

GB/T 7488, Water quality - Determination of biochemical oxygen demand after 5 days (BOD5) - Dilution and seeding method

GB/T 7494, Water quality - Determination of anionic surfactants - Methylene blue spectrophotometric method

GB 7959, Sanitary Standard for the non-hazardous treatment of night soil

GB/T 8538, Methods for examination of drinking natural mineral water

GB/T 11890, Water quality - Determination of benzene and its analogies - Gas chromatographic method

GB/T 11896, Water quality - Determination of chloride - Silver nitrate titration method

GB/T 11898, Water quality - Determination of free chlorine and total chlorine - Spectrophotometric method using N,N-diethyl-1,4 phenylenediamine

5 Other provisions

5.1 Before the irrigation of urban recycling water to green space, the basic control projects and selective control projects of the recycling water sources shall be fully tested. Carry out the irrigation test according to local climatic conditions, green plant species and soil conditions to confirm the selective control items and irrigation system.

5.2 Ancient trees must not be irrigated with the recycling water. Special flowers and newly introduced plants shall be carefully irrigated with the recycling water.

5.3 When using the recycling water to irrigate the green space, an emergency preparation plan shall be made. When an emergency occurs, stop using the recycling water immediately.

6 Sampling and monitoring

22 Benzene <=2.5

NOTE Except item 1, the unit for other items shall be mg/L. a, where the concentration units for sodium, calcium, magnesium ion are expressed in mmol/L. […]