science

Improved water source

Improved water source is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Improved water source rather than just read about it. In short: An improved water source (or improved drinking-water source or improved water supply) is a term used to categorize certain types or levels of water supply for monitoring purposes. It is defined as a type of water source that, by nature of its construction or through active intervention, is likely to be protected from outside contamination, in particular from contamination with fecal matter.

Key takeaways

Improved water source belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Improved water source to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Improved water source from memory before moving on to harder problems.

Reference excerpt

An improved water source (or improved drinking-water source or improved water supply) is a term used to categorize certain types or levels of water supply for monitoring purposes. It is defined as a type of water source that, by nature of its construction or through active intervention, is likely to be protected from outside contamination, in particular from contamination with fecal matter. The term was coined by the Joint Monitoring Program (JMP) for Water Supply and Sanitation of UNICEF and WHO in 2002 to help monitor the progress towards Goal Number 7 of the Millennium Development Goals (MDGs). The opposite of "improved water source" has been termed "unimproved water source" in the JMP definitions.

The same terms are used to monitor progress towards Sustainable Development Goal 6 (Target 6.1, Indicator 6.1.1) from 2015 onwards. Here, they are a component of the definition for "safely managed drinking water service".

Definitions

During SDG period (2015 to 2030) Indicator 6.1.1 of SDG 6 is "Proportion of population using safely managed drinking water services". The term "safely managed drinking water services" is defined as: "Drinking water from an improved water source that is located on premises, available when needed and free from fecal and priority chemical contamination". In 2017, the JMP defined a new term: "basic water service". This is defined as the drinking water coming from an improved source, and provided the collection time is not more than 30 minutes for a round trip. A lower level of service is now called "limited water service" which is the same as basic service but the collection time is longer than 30 minutes. Service levels are defined as (from lowest to highest): Surface water, unimproved, limited, basic, safely managed.

During MDG period (2000 until 2015) To allow for international comparability of estimates for monitoring the Millennium Development Goals (MDGs), the World Health Organization/UNICEF Joint Monitoring Program (JMP) for Water Supply and Sanitation defines "improved" drinking water sources as follows:

Piped water into dwelling Piped water into yard/plot Public tap/standpipes Tubewell/boreholes Protected dug wells Protected springs (normally part of a spring supply) Rainwater collection Bottled water, if the secondary source used by the household for cooking and personal hygiene is improved Water sources that are not considered as "improved" are:

Unprotected dug wells Unprotected springs Vendor provided water Cart with small tank/drum Bottled water, if the secondary source used by the household for cooking and personal hygiene is unimproved Tanker-truck Surface water

See also Human right to water and sanitation

References

Illustrations

Worked examples

Example 1 — a first encounter with Improved water source

Start with the simplest possible case. Write down what Improved water source claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Improved water source before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Improved water source ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Improved water source

In research: Improved water source appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Improved water source in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Improved water source is common in secondary-school and first-year university syllabi. It links to neighbouring topics Water supply, so understanding it makes those chapters shorter.
In everyday life: Look for Improved water source outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Improved water source in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Improved water source means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Improved water source out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Improved water source in simple terms?

Why does Improved water source matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Improved water source?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Improved water source.