Par River downstream of St Austell (North) sewage treatment works

EA name: PAR RIVER D/S ST.AUSTELL (NORTH) STW (also listed as “PAR RIVER DOWNSTREAM OF ST.AUSTELL (NORTH) STW”)
Environment Agency sampling point SW-81610186 · Freshwater - rivers · listed as open (“open” does not mean it is sampled now)

These are samples taken on a date, not live readings of the river. Results reach the Environment Agency's archive days to months after the sample is taken, so the newest here may be weeks or months old. FloodRadar does not grade them.

Where and when

Last sampled
1 Mar 2024, 10:322.6 years ago · time as the Environment Agency records it (UK clock time; the source gives no time zone). Not sampled since, as far as the archive shows: the Environment Agency was asked up to 8 Oct 2026 and had nothing newer.
Samples banked
4 since 5 Oct 2023 Imported periods: 1 Oct 2023 – 8 Oct 2026. Samples outside them are not shown here.
Latest sample
River / running surface water Planned investigation (local monitoring)
Where
National Grid 204518, 58074As published, to the nearest 1 m. Open in a map
River, by its own name
Par
River, by the map
Par RiverPlaced on the river its name gives, 0 m from the line.
Next gauge downstream
Ponts Vale On the Par River · 4.6 km along the river (the path rests on a repair to the map)Beside Luxulyan: too close to say above or below.
Why it was sampled
Environmental monitoring statutory (EU directives) (2 samples)
Planned investigation (local monitoring) (2 samples)

Main measurements, river water

Dissolved oxygen

% saturation · code 9901 · %

90.6%

Sampled 1 Mar 2024, 2.6 years ago · 4 results banked

8990919293%202420252026no sample published after Mar 20245 Oct 2023, 09:18: 91.1%1 Nov 2023, 14:27: 89.5%17 Jan 2024, 13:52: 92.4%1 Mar 2024, 10:32: 90.6%
Every result (4)
SampledResult as publishedReads as
1 Mar 2024, 10:3290.6 90.6%
17 Jan 2024, 13:5292.4 92.4%
1 Nov 2023, 14:2789.5 89.5%
5 Oct 2023, 09:1891.1 91.1%

Dissolved oxygen

as O2 · code 9924 · mg/l

11 mg/l

Sampled 1 Mar 2024, 2.6 years ago · 4 results banked

99.51010.51111.5mg/l202420252026no sample published after Mar 20245 Oct 2023, 09:18: 9.41 mg/l1 Nov 2023, 14:27: 9.62 mg/l17 Jan 2024, 13:52: 11.2 mg/l1 Mar 2024, 10:32: 11 mg/l
Every result (4)
SampledResult as publishedReads as
1 Mar 2024, 10:3211 11 mg/l
17 Jan 2024, 13:5211.2 11.2 mg/l
1 Nov 2023, 14:279.62 9.62 mg/l
5 Oct 2023, 09:189.41 9.41 mg/l

Water temperature

code 0076 · °C

7.1 °C

Sampled 1 Mar 2024, 2.6 years ago · 4 results banked

68101214°C202420252026no sample published after Mar 20245 Oct 2023, 09:18: 13.8 °C1 Nov 2023, 14:27: 12 °C17 Jan 2024, 13:52: 7 °C1 Mar 2024, 10:32: 7.1 °C
Every result (4)
SampledResult as publishedReads as
1 Mar 2024, 10:327.1 7.1 °C
17 Jan 2024, 13:527 7 °C
1 Nov 2023, 14:2712 12 °C
5 Oct 2023, 09:1813.8 13.8 °C

pH

code 0061

6.64

Sampled 1 Mar 2024, 2.6 years ago · 4 results banked

6.56.66.76.86.97202420252026no sample published after Mar 20245 Oct 2023, 09:18: 6.931 Nov 2023, 14:27: 6.617 Jan 2024, 13:52: 6.681 Mar 2024, 10:32: 6.64
Every result (4)
SampledResult as publishedReads as
1 Mar 2024, 10:326.64 6.64
17 Jan 2024, 13:526.68 6.68
1 Nov 2023, 14:276.6 6.6
5 Oct 2023, 09:186.93 6.93

Ammonia

ammoniacal nitrogen as N · code 0111 · mg/l

0.12 mg/l

Sampled 1 Mar 2024, 2.6 years ago · 4 results banked

00.20.40.60.81mg/l202420252026no sample published after Mar 20245 Oct 2023, 09:18: 0.83 mg/l1 Nov 2023, 14:27: 0.26 mg/l17 Jan 2024, 13:52: 0.2 mg/l1 Mar 2024, 10:32: 0.12 mg/l
Every result (4)
SampledResult as publishedReads as
1 Mar 2024, 10:320.12 0.12 mg/l
17 Jan 2024, 13:520.2 0.2 mg/l
1 Nov 2023, 14:270.26 0.26 mg/l
5 Oct 2023, 09:180.83 0.83 mg/l

Nitrate

as nitrogen (N) · code 0117 · mg/l

1.19 mg/l

Sampled 1 Mar 2024, 2.6 years ago · 4 results banked

0.7511.251.51.752mg/l202420252026no sample published after Mar 20245 Oct 2023, 09:18: 0.956 mg/l1 Nov 2023, 14:27: 1.07 mg/l17 Jan 2024, 13:52: 1.88 mg/l1 Mar 2024, 10:32: 1.19 mg/l
Every result (4)
SampledResult as publishedReads as
1 Mar 2024, 10:321.19 1.19 mg/l
17 Jan 2024, 13:521.88 1.88 mg/l
1 Nov 2023, 14:271.07 1.07 mg/l
5 Oct 2023, 09:180.956 0.956 mg/l

Phosphate

orthophosphate, reactive, as P · code 0180 · mg/l

0.081 mg/l

Sampled 1 Mar 2024, 2.6 years ago · 4 results banked

00.20.40.60.8mg/l202420252026no sample published after Mar 20245 Oct 2023, 09:18: 0.67 mg/l1 Nov 2023, 14:27: 0.49 mg/l17 Jan 2024, 13:52: 0.22 mg/l1 Mar 2024, 10:32: 0.081 mg/l
Every result (4)
SampledResult as publishedReads as
1 Mar 2024, 10:320.081 0.081 mg/l
17 Jan 2024, 13:520.22 0.22 mg/l
1 Nov 2023, 14:270.49 0.49 mg/l
5 Oct 2023, 09:180.67 0.67 mg/l

Conductivity

at 25 °C · code 0077 · µS/cm

149 µS/cm

Sampled 1 Mar 2024, 2.6 years ago · 4 results banked

100150200250300µS/cm202420252026no sample published after Mar 20245 Oct 2023, 09:18: 269 µS/cm1 Nov 2023, 14:27: 205 µS/cm17 Jan 2024, 13:52: 254 µS/cm1 Mar 2024, 10:32: 149 µS/cm
Every result (4)
SampledResult as publishedReads as
1 Mar 2024, 10:32149 149 µS/cm
17 Jan 2024, 13:52254 254 µS/cm
1 Nov 2023, 14:27205 205 µS/cm
5 Oct 2023, 09:18269 269 µS/cm

Everything measured here

18 determinands, each kept by its code, unit and sample material: results in different units or on different materials are never mixed. A “below” result is under the laboratory's detection limit, not zero.

Show all 18 rows
DeterminandMaterialResults First – lastLatest result
Oxygen, Dissolved, % Saturation 9901 River water 4 Oct 2023 – Mar 2024 90.6% 1 Mar 2024
Oxygen, Dissolved as O2 9924 River water 4 Oct 2023 – Mar 2024 11 mg/l 1 Mar 2024
Temperature of Water 0076 River water 4 Oct 2023 – Mar 2024 7.1 °C 1 Mar 2024
pH 0061 River water 4 Oct 2023 – Mar 2024 6.64 1 Mar 2024
Ammoniacal Nitrogen as N 0111 River water 4 Oct 2023 – Mar 2024 0.12 mg/l 1 Mar 2024
Nitrate as N 0117 River water 4 Oct 2023 – Mar 2024 1.19 mg/l 1 Mar 2024
Orthophosphate, reactive as P 0180 River water 4 Oct 2023 – Mar 2024 0.081 mg/l 1 Mar 2024
Conductivity at 25 C 0077 River water 4 Oct 2023 – Mar 2024 149 µS/cm 1 Mar 2024
Alkalinity to pH 4.5 as CaCO3 0162 River water 4 Oct 2023 – Mar 2024 17 mg/l 1 Mar 2024
Ammonia un-ionised as N 0119 River water 4 Oct 2023 – Mar 2024 0.00008 mg/l 1 Mar 2024
Calcium, Dissolved 0239 River water 2 Oct 2023 – Jan 2024 9.4 mg/l 17 Jan 2024
Carbon, Organic, Dissolved as C :- {DOC} 0301 River water 2 Oct 2023 – Jan 2024 2.7 mg/l 17 Jan 2024
Iron, Dissolved 6460 River water 2 Oct 2023 – Jan 2024 660 µg/l 17 Jan 2024
Magnesium, Dissolved 0235 River water 2 Oct 2023 – Jan 2024 3.5 mg/l 17 Jan 2024
Nitrite as N 0118 River water 4 Oct 2023 – Mar 2024 0.0097 mg/l 1 Mar 2024
Nitrogen, Total Oxidised as N 0116 River water 4 Oct 2023 – Mar 2024 1.2 mg/l 1 Mar 2024
Solids, non-volatile at 500 C 0143 River water 3 Nov 2023 – Mar 2024 20 mg/l 1 Mar 2024
Solids, Suspended at 105 C 0135 River water 4 Oct 2023 – Mar 2024 28 mg/l 1 Mar 2024

FloodRadar does not grade these results: there is no overall score, and official river classifications are a separate dataset. A sample taken downstream of an overflow does not by itself show where anything in it came from. River connections and distances are traced on OS Open Rivers (edition 2026-04), which leaves out many small channels.

Water samples: Environment Agency Water Quality Archive, © Environment Agency and/or database right 2026, Open Government Licence v3.0.

Contains OS data © Crown copyright and database rights 2026.