Water Data for the Nation

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Scheduled Maintenance Notice
USGS will be performing maintenance on the time series data processing system beginning at 09:00 EDT on September 10, 2026. During this period, delivery of the latest time series data will be delayed. The maintenance is expected to finish within 2 hours, after which all backlogged time series data will be processed and delivered to WDFN web portals and APIs.

Browse monitoring locations within Mason County, Illinois

19N09W-07.4D - IL003-400642090091301
19N09W-08.2F - IL003-400655090074801
19N09W-16.4H - IL003-400615090065901
19N10W-13.8B - IL003-400537090105001
19N10W-23.2B - IL003-400444090110601
19N10W-30.3D Well No. 1 - IL003-400409090155001
19N11W-13.7B - IL003-400541090171801
19N11W-13.8A Well No. 2 - IL003-400534090172601
20N 5W- 7.1a1 - USGS-401154089415601
20N 5W- 8.8f1 - USGS-401214089414501
20N 5W- 8.8f2 - USGS-401215089414501
20N 5W-23.2f1 - USGS-401030089373201
20N 7W-18.2a1 - USGS-401045089554001
20N 7W-20.3g1 - USGS-401033089543901
20N05W-07.1A Well No. 5 - IL003-401139089415401
20N05W-07.1C - IL003-401152089415401
20N05W-09.4D - IL003-401160089400601
20N05W-12.2A - IL003-401141089362401
20N05W-21.8E - IL003-401021089403801
20N05W-22.2A - IL003-400955089383801
20N06W-09.2A - IL003-401138089463701
20N07W-14.8A - IL003-401046089515601
20N07W-19.5G - IL003-401031089560301
20N07W-28.7H - IL003-400946089540401
20N07W-34.6H - IL003-400855089524701
20N07W-34.8B - IL003-400815089530401
20N08W-02.4E - IL003-401252089575801
20N08W-02.5E - IL003-401252089580701
20N08W-03.4A - IL003-401226089590601
20N08W-04.1A - IL003-401226089594901
20N08W-11.3G - IL003-401213089575001
20N08W-11.8D - IL003-401153089583301
20N08W-14.2G - IL003-401121089574201
20N08W-21.2G - IL003-401028089595801
20N08W-26.1B - IL003-400904089573301
20N08W-28.2B - IL003-400904089595701
20N08W-34.2E - IL003-400831089584901
20N09W-03.2G - IL003-401253090053401
20N09W-08.4D - IL003-401155090080701
20N09W-12.2A - IL003-401133090031601
20N09W-17.7A - IL003-401043090083201
20N09W-19.2E - IL003-401017090085701
20N09W-24.1B - IL003-400956090030601
20N09W-24.3H - IL003-401035090032401
20N09W-26.7F - IL003-400929090050701
20N09W-26.8E - IL003-400923090051501
20N09W-28.7B - IL003-400904090072301
20N09W-28.7G - IL003-400937090072401
20N09W-29.2A - IL003-400857090074901
20N09W-30.3B - IL003-400905090090501
20N09W-31.2G - IL003-400845090085701
20N5W-7.1a9 - USGS-401154089415609
20N5W-7a - USGS-401153089415501
20N5W-8.8f9 - USGS-401215089414509
21N 5W- 1.1g - USGS-401811089361801
21N 5W- 1.1g1 - USGS-401811089361601
21N 7W- 2.7b1 - USGS-401238089543901
21N 7W-21.7h - USGS-401509089540401
21N 7W-25.7a1 - USGS-401354089504001
21N 7W-25.7a2 - USGS-401351089503901
21N 7W-34.2a1 - USGS-401305089521001
21N 8W- 6.8e - USGS-401754090032001
21N 8W-16.6a - USGS-401542090004701
21N 9W- 1.1f1 - USGS-401801090032701
21N 9W- 1.1f2 - USGS-401802090032801
21N 9W-12.8f1 - USGS-401704090042501
21N 9W-12.8f2 - USGS-401704090042601
21N 9W-12.8f3 - USGS-401707090042501
21N 9W-12.8f4 - USGS-401708090042401
21N 9W-12.8f5 - USGS-401706090043001
21N 9W-12.8f6 - USGS-401707090042901
21N 9W-12.8f7 - USGS-401703090043101
21N05W-07.6H - IL003-401722089423401
21N05W-08.1H - IL003-401721089404301
21N05W-08.4H - IL003-401721089410901
21N05W-09.8D - IL003-401655089403501
21N05W-17.1E - IL003-401609089404201
21N05W-20.1E - IL003-401517089404201
21N05W-24.6A - IL003-401454089365301
21N05W-27.2G - IL003-401440089383301
21N05W-32.1G - IL003-401346089404001
21N06W-04.3G - IL003-401805089464001
21N06W-04.7H - IL003-401811089471401
21N06W-05.4H - IL003-401809089475701
21N06W-05.5H - IL003-401809089480501
21N06W-06.5H - IL003-401808089491301
21N06W-16.1B - IL003-401549089462101
21N06W-16.8D - IL003-401602089472101
21N06W-25.3A - IL003-401360089431401
21N07W-04.6B - IL003-401732089535201
21N07W-05.6F - IL003-401758089550301
21N07W-05.8F - IL003-401758089552001
21N07W-15.1A - IL003-401541089520201
21N07W-15.3F - IL003-401613089521901
21N07W-15.7G - IL003-401620089525401
21N07W-17.2F - IL003-401614089542701
21N07W-22.6C - IL003-401502089524601
21N07W-25.7A Well No. 1 - IL003-401357089503701
21N07W-26.1E - IL003-401423089505401
21N07W-30.3G - IL003-401436089554401
21N07W-34.8H - IL003-401350089530301
21N08W-01.2G - IL003-401807089564501
21N08W-01.8F - IL003-401760089573601
21N08W-02.4C - IL003-401741089580901
21N08W-02.5G - IL003-401807089581701
21N08W-02.8H - IL003-401813089584301
21N08W-03.2G - IL003-401806089590101
21N08W-04.1G - IL003-401806090000101
21N08W-05.7C - IL003-401738090020101
21N08W-06.8E Well No. 5 - IL003-401751090032001
21N08W-07.7H - IL003-401719090031001
21N08W-08.2B - IL003-401640090011801
21N08W-11.2A - IL003-401635089575101
21N08W-11.2G - IL003-401715089575201
21N08W-12.2C - IL003-401648089564501
21N08W-15.4B - IL003-401549089591801
21N08W-15.8F - IL003-401615089595201
21N08W-15.8H - IL003-401629089595301
21N08W-16.1C - IL003-401557090000201
21N08W-18.1A - IL003-401541090021901
21N08W-21.4B - IL003-401457090002701
21N08W-23.8G - IL003-401530089584301
21N08W-24.2G - IL003-401529089564501
21N08W-24.6E - IL003-401516089571901
21N08W-25.2G - IL003-401437089564501
21N08W-28.1B - IL003-401405090000201
21N08W-28.1G - IL003-401438090000201
21N08W-33.3D - IL003-401324090001901
21N08W-36.3C - IL003-401318089565301
21N08W-36.7B - IL003-401311089572701
21N09W-01.1F - IL003-401759090032701
21N09W-11.6C - IL003-401645090052001
21N09W-14.2D - IL003-401559090044701
21N09W-24.3H - IL003-401535090034601
21N09W-24.5G - IL003-401529090040301
21N8W-6.8e9 - USGS-401754090032009
21N9W-1.1f9 - USGS-401802090032809
22N 5E- 3.7h - USGS-402328089525401
22N 6W- 5.2b1 - USGS-402248089473701
22N 6W-35.4c1 - USGS-401831089443101
22N 7W- 3.3h1 - USGS-402326089521601
22N 7W- 3.3h2 - USGS-402325089521501
22N06W-02.1F - IL003-402313089440801
22N06W-02.6G - IL003-402320089445101
22N06W-02.6H - IL003-402326089445101
22N06W-09.2A - IL003-402147089463101
22N06W-12.1C - IL003-402202089430101
22N06W-13.8G - IL003-402136089436001
22N06W-16.4G - IL003-402133089464901
22N06W-18.2B - IL003-402059089484901
22N06W-18.4F - IL003-402125089490601
22N06W-18.7C - IL003-402106089493201
22N06W-19.1A - IL003-402000089484101
22N06W-28.2B - IL003-401915089463101
22N06W-29.3D - IL003-401928089474901
22N06W-29.5A - IL003-401908089480601
22N06W-32.1G - IL003-401855089473101
22N06W-33.2B - IL003-401823089463101
22N06W-33.7B - IL003-401823089471401
22N07W-03.4H Well No. 13 - IL003-402325089522601
22N07W-07.6B - IL003-402158089561201
22N07W-11.1B - IL003-402155089505501
22N07W-11.6B - IL003-402155089513801
22N07W-13.3A - IL003-402053089500401
22N07W-13.4A - IL003-402053089501201
22N07W-17.5C - IL003-402110089545501
22N07W-17.5G - IL003-402136089545501
22N07W-18.8G - IL003-402137089562901
22N07W-20.7D - IL003-402024089551201
22N07W-22.7H - IL003-402048089525601
22N07W-23.2B - IL003-402009089510401
22N07W-24.2H - IL003-402047089495501
22N07W-24.4E - IL003-402027089501301
22N07W-24.5H - IL003-402047089502101
22N07W-24.7C - IL003-402014089503801
22N07W-24.8G - IL003-402040089504701
22N07W-25.1F - IL003-401941089494701
22N07W-27.1D - IL003-401929089520601
22N07W-29.1h1 (PZ-1) - USGS-401935089542001
22N07W-29.1h2 (PZ-2) - USGS-401934089542001
22N07W-29.1h3 (PZ-3) - USGS-401933089542001
22N07W-29.1h4 (PZ-4) - USGS-401931089542001
22N07W-29.1h5 (PZ-2B) - USGS-401934089542002
22N07W-29.1h6 (PZ-3B) - USGS-401933089542002
22N07W-29.1h7 (PZ-4B) - USGS-401931089542002
22N07W-29.6A - IL003-401911089550401
22N07W-31.6D - IL003-401839089561301
22N07W-32.4D - IL003-401838089544701
22N07W-33.7F Well No. 10 - IL003-401850089540501
22N07W-33.7G Well No. 11 - IL003-401857089540501
22N07W-34.1A - IL003-401817089520701
22N07W-34.2B - IL003-401823089521501
22N07W-35.2C - IL003-401829089510501
22N07W-35.7C - IL003-401829089514701
22N08W-10.8B - IL003-402157089595101
22N08W-13.5D - IL003-402119089570801
22N08W-23.2B - IL003-402013089575201
22N08W-24.2B - IL003-402013089564301
22N08W-24.3E - IL003-402032089565201
22N08W-25.2B - IL003-401919089564301
22N08W-26.8A - IL003-401913089584301
22N08W-27.4E - IL003-401940089591801
22N08W-27.7G - IL003-401953089594401
22N08W-28.2G - IL003-401954090000901
22N08W-28.6C - IL003-401928090004301
22N08W-29.6B - IL003-401921090015001
22N08W-31.8D - IL003-401840090031701
22N08W-33.4E - IL003-401848090002701
22N08W-33.7A - IL003-401822090005201
22N6W-7.8f1 - USGS-402218089494101
22N6W-7.8f2 - USGS-402218089494102
22N7W-28.5a (Havana lowlands) - USGS-401913089434501
22N7W-28.5a (IL Tree Nursery) - USGS-401913089534501
22N7W-29.1d1 (DP-1) - USGS-401934089541701
22N7W-29.1d2 (SH-1) - USGS-401934089541702
22N7W-29.1d3 (DP-2) - USGS-401934089541703
22N7W-29.1d4 (SH-2) - USGS-401934089541704
22N7W-29.1d5 (DP-3) - USGS-401934089541705
22N7W-29.1d6 (SH-3) - USGS-401934089541706
22N7W-29.1d7 (SH-4) - USGS-401934089541707
23N 6W-21.3a1 - USGS-402518089464501
23N 6W-21.3a2 - USGS-402515089464301
23N 6W-21.3d1 - USGS-402536089464301
23N 6W-21.3d2 - USGS-402536089464302
23N 6W-21.4b1 - USGS-402530089464201
23N 7W-26.8g - USGS-402504089515101
23N 7W-34.1b - USGS-402334089515901
23N06W-21.3A Well No. 5 - IL003-402516089464401
23N06W-24.3E - IL003-402545089432201
23N06W-24.8E - IL003-402545089440501
23N07W-22.8H - IL003-402603089530201
23N07W-25.5B - IL003-402429089502001
23N07W-27.5D - IL003-402444089523701
23N07W-27.5E - IL003-402450089523701
23N07W-27.6F - IL003-402457089524601
23N07W-27.6G - IL003-402503089524601
23N07W-27.6H - IL003-402510089524601
23N07W-28.8E - IL003-402451089541001
23N07W-28.8G - IL003-402504089541001
23N07W-29.2B - IL003-402433089543101
23N07W-29.7D - IL003-402446089551401
23N07W-32.2H - IL003-402420089543001
23N07W-34.3A Well No. 12 - IL003-402330089522001
23N6W-21.3a9 - USGS-402518089464509
Bulk Dep Site at Tree Nursery Well NR Topeka, IL - USGS-401913089534502
Crane Creek Near Easton, IL - USGS-05582500
East Branch Illinois River Outlet NR Bath, IL - USGS-400923090120401
Havana - USGS-91700000891
Herget Drainage Ditch Near Kilbourne, IL - USGS-400856089562001
Illinois River Near Havana, IL (Corps) - USCE-401734090040701
Illinois River at Havana Velocity - USGS-05570505
Illinois River at Havana, IL - USGS-05570500
Illinois River at Liverpool, IL - USGS-05568670
Illinois River at Power Company at Havana, IL - USGS-05570520
Intake on Illinois River near Havana, IL - IL003-401644090045701
Mason Tazewell Drainage D NR Nursery NR Topeka, IL - USGS-05568703
Mason Tazewell Drainage D Rain Gage NR Topeka, IL - USGS-401934089541708
Mason Tazewell Drainage D at CR2350E NR Topeka, IL - USGS-05568705
Mason Tazewell Drainage Ditch NR Topeka, IL - USGS-05568704
Mason Tazewell Drainage Ditch at Forest City, IL - USGS-05568700
Quiver Lake Near Havana, IL - USGS-402017090023501
Rain Gage at Illinois River at Havana, IL - USCE-401734090040700
Rain Gage at Sangamon River Near Oakford, IL - USCE-400727089590600
Sand Ridge ST Forest Well NO 3 - USGS-402328089525901
Sangamon River Near Chandlerville, IL (Corps) - USCE-400343090092101
Sangamon River Near Chandlerville, IL - USGS-05583500
Sangamon River Near Oakford, IL - USGS-05583000
Well 1 Havana, IL - IL003-401529090050001
Well 2 Havana, IL - IL003-401528090044401
Well 3 Havana, IL - IL003-401528090042101
Well 4 Havana, IL - IL003-401533090045801
Well 6 Havana, IL - IL003-401630090044301

Important

This list uses USGS Water Data OGC APIs. View the Swagger documentation for this API